fun: animules

This reverts commit 05350e6ccf.

app/astride/sandbox.js

@@ -704,7 +704,10 @@ export default class Sandbox {
     switch (result.yield) {
       case YIELD_PROMISE: {
         stepResult.async = true;
-        stepResult.value = Promise.resolve(result.value)
+        const promise = result.value instanceof Promise
+          ? result.value
+          : Promise.resolve(result.value);
+        promise
           .then((value) => {
             const top = this.$$execution.stack[this.$$execution.stack.length - 1];
             this.$$execution.deferred.set(top, {
@@ -712,6 +715,7 @@ export default class Sandbox {
               yield: YIELD_NONE,
             });
           });
+        stepResult.value = promise;
         break;
       }
       case YIELD_LOOP_UPDATE: {

app/ecs/component.js

@@ -2,10 +2,9 @@ import Schema from './schema.js';
 
 export default class Component {
 
-  data = [];
   ecs;
   Instance;
-  map = {};
+  instances = {};
   pool = [];
   static properties = {};
   static $$schema;
@@ -21,7 +20,7 @@ export default class Component {
       results.push(
         this.pool.length > 0
           ? this.pool.pop()
-          : this.data.push(new this.Instance()) - 1,
+          : new this.Instance(),
       )
       count -= 1;
     }
@@ -38,35 +37,51 @@ export default class Component {
       return [];
     }
     const allocated = this.allocateMany(entries.length);
-    const {properties} = this.constructor.schema.specification.concrete;
+    const {
-    const Schema = this.constructor.schema.constructor;
+      constructor: Schema,
-    const keys = Object.keys(properties);
+      specification: {concrete: {properties}},
+    } = this.constructor.schema;
+    const defaults = {};
+    for (const key in properties) {
+      defaults[key] = ((key) => () => Schema.defaultValue(properties[key]))(key);
+      switch (properties[key].type) {
+        case 'float32':
+        case 'float64':
+        case 'int8':
+        case 'int16':
+        case 'int32':
+        case 'int64':
+        case 'string':
+        case 'uint8':
+        case 'uint16':
+        case 'uint32':
+        case 'uint64': {
+          defaults[key] = defaults[key]();
+          break;
+        }
+      }
+    }
+    const keys = new Set(Object.keys(defaults));
     const promises = [];
     for (let i = 0; i < entries.length; ++i) {
-      const [entityId, values = {}] = entries[i];
+      const [entityId, values] = entries[i];
-      this.map[entityId] = allocated[i];
+      const instance = allocated[i];
-      this.data[allocated[i]].entity = entityId;
+      instance.entity = entityId;
-      for (let k = 0; k < keys.length; ++k) {
+      this.instances[entityId] = instance;
-        const j = keys[k];
+      for (const key in values) {
-        const instance = this.data[allocated[i]];
+        keys.delete(key);
-        if (j in values) {
-          instance[j] = values[j];
       }
-        else {
+      const defaultValues = {};
-          const defaultValue = Schema.defaultValue(properties[j]);
+      for (const key of keys) {
-          if ('undefined' !== typeof defaultValue) {
+        defaultValues[key] = 'function' === typeof defaults[key]
-            instance[j] = defaultValue;
+          ? defaults[key]()
+          : defaults[key];
       }
-        }
+      instance.initialize(values, defaultValues);
-      }
+      promises.push(this.load(instance));
-      promises.push(this.load(this.data[allocated[i]]));
     }
     await Promise.all(promises);
-    const created = [];
+    return allocated;
-    for (let i = 0; i < allocated.length; ++i) {
-      created.push(this.data[allocated[i]]);
-    }
-    return created;
   }
 
   deserialize(entityId, view, offset) {
@@ -79,22 +94,18 @@ export default class Component {
   }
 
   destroy(entityId) {
-    this.destroyMany([entityId]);
+    this.destroyMany(new Set([entityId]));
   }
 
-  destroyMany(entities) {
+  destroyMany(entityIds) {
-    this.freeMany(
+    for (const entityId of entityIds) {
-      entities
+      const instance = this.instances[entityId];
-        .map((entityId) => {
+      if ('undefined' === typeof instance) {
-          if ('undefined' !== typeof this.map[entityId]) {
-            return this.map[entityId];
-          }
         throw new Error(`can't free for non-existent id ${entityId}`);
-        }),
+      }
-    );
+      instance.destroy();
-    for (let i = 0; i < entities.length; i++) {
+      this.pool.push(instance);
-      this.data[this.map[entities[i]]].destroy();
+      delete this.instances[entityId];
-      this.map[entities[i]] = undefined;
     }
   }
 
@@ -110,14 +121,8 @@ export default class Component {
     return json;
   }
 
-  freeMany(indices) {
-    for (let i = 0; i < indices.length; ++i) {
-      this.pool.push(indices[i]);
-    }
-  }
-
   get(entityId) {
-    return this.data[this.map[entityId]];
+    return this.instances[entityId];
   }
 
   async insertMany(entities) {
@@ -127,25 +132,25 @@ export default class Component {
   instanceFromSchema() {
     const Component = this;
     const {concrete} = Component.constructor.schema.specification;
-    const Schema = Component.constructor.schema.constructor;
     const Instance = class {
       $$entity = 0;
-      constructor() {
-        this.$$reset();
-      }
-      $$reset() {
-        for (const key in concrete.properties) {
-          this[`$$${key}`] = Schema.defaultValue(concrete.properties[key]);
-        }
-      }
       destroy() {}
+      initialize(values, defaults) {
+        for (const key in values) {
+          this[`$$${key}`] = values[key];
+        }
+        for (const key in defaults) {
+          this[`$$${key}`] = defaults[key];
+        }
+        Component.ecs.markChange(this.entity, {[Component.constructor.componentName]: values})
+      }
       toNet(recipient, data) {
         return data || Component.constructor.filterDefaults(this);
       }
       toJSON() {
         return Component.constructor.filterDefaults(this);
       }
-      update(values) {
+      async update(values) {
         for (const key in values) {
           if (concrete.properties[key]) {
             this[`$$${key}`] = values[key];
@@ -163,7 +168,6 @@ export default class Component {
       },
       set: function set(v) {
         this.$$entity = v;
-        this.$$reset();
       },
     };
     for (const key in concrete.properties) {
@@ -214,10 +218,12 @@ export default class Component {
   }
 
   async updateMany(entities) {
+    const promises = [];
     for (let i = 0; i < entities.length; i++) {
       const [entityId, values] = entities[i];
-      this.get(entityId).update(values);
+      promises.push(this.get(entityId).update(values));
     }
+    return Promise.all(promises);
   }
 
 }

app/ecs/components/alive.js

@@ -19,6 +19,7 @@ export default class Alive extends Component {
         this.$$dead = true;
         const {Ticking} = ecs.get(this.entity);
         if (Ticking) {
+          this.$$death.context.entity = ecs.get(this.entity);
           const ticker = this.$$death.ticker();
           ecs.addDestructionDependency(this.entity.id, ticker);
           Ticking.add(ticker);
@@ -35,7 +36,6 @@ export default class Alive extends Component {
       instance.deathScript,
       {
         ecs: this.ecs,
-        entity: this.ecs.get(instance.entity),
       },
     );
     if (0 === instance.maxHealth) {

app/ecs/components/behaving.js

@@ -2,11 +2,13 @@ import Component from '@/ecs/component.js';
 
 export default class Behaving extends Component {
   instanceFromSchema() {
+    const {ecs} = this;
     return class BehavingInstance extends super.instanceFromSchema() {
       $$routineInstances = {};
       tick(elapsed) {
         const routine = this.$$routineInstances[this.currentRoutine];
         if (routine) {
+          routine.context.entity = ecs.get(this.entity);
           routine.tick(elapsed);
         }
       }
@@ -20,12 +22,7 @@ export default class Behaving extends Component {
     const promises = [];
     for (const key in instance.routines) {
       promises.push(
-        this.ecs.readScript(
+        this.ecs.readScript(instance.routines[key])
-          instance.routines[key],
-          {
-            entity: this.ecs.get(instance.entity),
-          },
-        )
           .then((script) => {
             instance.$$routineInstances[key] = script;
           }),

app/ecs/components/collider.js

@@ -106,6 +106,7 @@ export default class Collider extends Component {
           if (!hasMatchingIntersection) {
             if (this.$$collisionStart) {
               const script = this.$$collisionStart.clone();
+              script.context.entity = thisEntity;
               script.context.other = otherEntity;
               script.context.pair = [body, otherBody];
               const ticker = script.ticker();
@@ -115,6 +116,7 @@ export default class Collider extends Component {
             }
             if (other.$$collisionStart) {
               const script = other.$$collisionStart.clone();
+              script.context.entity = otherEntity;
               script.context.other = thisEntity;
               script.context.pair = [otherBody, body];
               const ticker = script.ticker();
@@ -229,7 +231,7 @@ export default class Collider extends Component {
         this.$$aabb = {x0: Infinity, x1: -Infinity, y0: Infinity, y1: -Infinity};
         this.$$aabbs = [];
         const {bodies} = this;
-        const {Direction: {direction = 0} = {}} = ecs.get(this.entity);
+        const {Direction: {direction = 0} = {}} = ecs.get(this.entity) || {};
         for (const body of bodies) {
           let x0 = Infinity, x1 = -Infinity, y0 = Infinity, y1 = -Infinity;
           for (const point of transform(body.points, {rotation: direction})) {
@@ -271,14 +273,12 @@ export default class Collider extends Component {
       instance.collisionEndScript,
       {
         ecs: this.ecs,
-        entity: this.ecs.get(instance.entity),
       },
     );
     instance.$$collisionStart = await this.ecs.readScript(
       instance.collisionStartScript,
       {
         ecs: this.ecs,
-        entity: this.ecs.get(instance.entity),
       },
     );
   }

app/ecs/components/index.js

@@ -6,9 +6,13 @@ const Gathered = gather(
 
 const Components = {};
 for (const componentName in Gathered) {
-  Components[componentName] = class Named extends Gathered[componentName] {
+  Components[componentName] = eval(`
-    static componentName = componentName;
+    ((Gathered) => (
-  };
+      class ${componentName} extends Gathered['${componentName}'] {
+        static componentName = '${componentName}';
+      }
+    ))
+  `)(Gathered);
 }
 
 export default Components;

app/ecs/components/interactive.js

@@ -8,7 +8,8 @@ export default class Interactive extends Component {
       interact(initiator) {
         const script = this.$$interact.clone();
         script.context.initiator = initiator;
-        const {Ticking} = ecs.get(this.entity);
+        script.context.subject = ecs.get(this.entity);
+        const {Ticking} = script.context.subject;
         Ticking.add(script.ticker());
       }
       get interacting() {
@@ -28,7 +29,6 @@ export default class Interactive extends Component {
       instance.interactScript,
       {
         ecs: this.ecs,
-        subject: this.ecs.get(instance.entity),
       },
     );
   }

app/ecs/components/sprite.js

@@ -1,9 +1,13 @@
 import Component from '@/ecs/component.js';
+import {hexToHsl, hslToHex} from '@/util/color.js';
 
 export default class Sprite extends Component {
   instanceFromSchema() {
     return class SpriteInstance extends super.instanceFromSchema() {
       $$anchor = {x: 0.5, y: 0.5};
+      $$hue = 0;
+      $$saturation = 0;
+      $$lightness = 1;
       $$scale = {x: 1, y: 1};
       $$sourceJson = {};
       get anchor() {
@@ -14,12 +18,14 @@ export default class Sprite extends Component {
       }
       set anchorX(anchorX) {
         this.$$anchor = {x: anchorX, y: this.anchorY};
+        super.anchorX = anchorX;
       }
       get anchorY() {
         return this.$$anchor.y;
       }
       set anchorY(anchorY) {
         this.$$anchor = {x: this.anchorX, y: anchorY};
+        super.anchorY = anchorY;
       }
       get animation() {
         return super.animation;
@@ -57,6 +63,37 @@ export default class Sprite extends Component {
         }
         return true;
       }
+      get hue() {
+        return this.$$hue;
+      }
+      set hue(hue) {
+        this.$$hue = hue;
+        const [, s, l] = hexToHsl(this.$$tint);
+        super.tint = hslToHex(hue, s, l);
+      }
+      initialize(values, defaults) {
+        let {
+          animation = defaults.animation,
+          anchorX = defaults.anchorX,
+          anchorY = defaults.anchorY,
+          frame = defaults.frame,
+          scaleX = defaults.scaleX,
+          scaleY = defaults.scaleY,
+        } = values;
+        this.$$anchor = {x: anchorX, y: anchorY};
+        this.$$scale = {x: scaleX, y: scaleY};
+        super.initialize(values, defaults);
+        this.frame = frame;
+        this.animation = animation;
+      }
+      get lightness() {
+        return this.$$lightness;
+      }
+      set lightness(lightness) {
+        this.$$lightness = lightness;
+        const [h, s] = hexToHsl(this.$$tint);
+        super.tint = hslToHex(h, s, lightness);
+      }
       get rotates() {
         if (!this.$$sourceJson.meta) {
           return false;
@@ -69,20 +106,37 @@ export default class Sprite extends Component {
         }
         return this.$$sourceJson.meta.rotation;
       }
+      get saturation() {
+        return this.$$saturation;
+      }
+      set saturation(saturation) {
+        this.$$saturation = saturation;
+        const [h, , l] = hexToHsl(this.$$tint);
+        super.tint = hslToHex(h, saturation, l);
+      }
       get scale() {
         return this.$$scale;
       }
+      set scale(scale) {
+        if ('number' === typeof scale) {
+          scale = {x: scale, y: scale};
+        }
+        this.scaleX = scale.x;
+        this.scaleY = scale.y;
+      }
       get scaleX() {
         return this.$$scale.x;
       }
       set scaleX(scaleX) {
         this.$$scale = {x: scaleX, y: this.scaleY};
+        super.scaleX = scaleX;
       }
       get scaleY() {
         return this.$$scale.y;
       }
       set scaleY(scaleY) {
         this.$$scale = {x: this.scaleX, y: scaleY};
+        super.scaleY = scaleY;
       }
       get size() {
         if (!this.$$sourceJson.frames) {
@@ -93,11 +147,48 @@ export default class Sprite extends Component {
           : '';
         return this.$$sourceJson.frames[frame].sourceSize;
       }
+      get tint() {
+        return super.tint;
+      }
+      set tint(tint) {
+        [
+          this.$$hue,
+          this.$$saturation,
+          this.$$lightness,
+        ] = hexToHsl(tint)
+        super.tint = tint;
+      }
       toNet(recipient, data) {
         // eslint-disable-next-line no-unused-vars
         const {elapsed, ...rest} = super.toNet(recipient, data);
         return rest;
       }
+      update(values) {
+        for (const key in values) {
+          switch (key) {
+            case 'anchorX': {
+              this.$$anchor.x = values[key];
+              break;
+            }
+            case 'anchorY': {
+              this.$$anchor.y = values[key];
+              break;
+            }
+            case 'scaleX': {
+              this.$$scale.x = values[key];
+              break;
+            }
+            case 'scaleY': {
+              this.$$scale.y = values[key];
+              break;
+            }
+            default: {
+              continue;
+            }
+          }
+        }
+        return super.update(values);
+      }
     };
   }
   async load(instance) {
@@ -123,6 +214,6 @@ export default class Sprite extends Component {
     scaleY: {defaultValue: 1, type: 'float32'},
     source: {type: 'string'},
     speed: {type: 'float32'},
-    tint: {type: 'uint32'},
+    tint: {defaultValue: 0xffffff, type: 'uint32'},
   };
 }

app/ecs/components/ttl.js

@@ -5,9 +5,15 @@ export default class Ttl extends Component {
     const {ecs} = this;
     return class TtlInstance extends super.instanceFromSchema() {
       $$elapsed = 0;
-      $$reset() {
+      destroy() {
         this.$$elapsed = 0;
       }
+      get elapsed() {
+        return this.$$elapsed;
+      }
+      set elapsed(elapsed) {
+        this.$$elapsed = elapsed;
+      }
       tick(elapsed) {
         this.$$elapsed += elapsed;
         if (this.$$elapsed >= this.ttl) {

app/ecs/ecs.js

@@ -1,7 +1,7 @@
 import {Encoder, Decoder} from '@msgpack/msgpack';
 import {LRUCache} from 'lru-cache';
 
-import {Ticker, withResolvers} from '@/util/promise.js';
+import {withResolvers} from '@/util/promise.js';
 import Script from '@/util/script.js';
 
 import EntityFactory from './entity-factory.js';
@@ -23,16 +23,22 @@ export default class Ecs {
 
   deferredChanges = {}
 
+  $$deindexing = new Set();
+
   $$destructionDependencies = new Map();
 
-  diff = {};
+  $$detached = new Set();
 
-  Systems = {};
+  diff = {};
 
   $$entities = {};
 
   $$entityFactory = new EntityFactory();
 
+  $$reindexing = new Set();
+
+  Systems = {};
+
   constructor({Systems, Components} = {}) {
     for (const componentName in Components) {
       this.Components[componentName] = new Components[componentName](this);
@@ -58,7 +64,7 @@ export default class Ecs {
 
   async apply(patch) {
     const creating = [];
-    const destroying = [];
+    const destroying = new Set();
     const inserting = [];
     const removing = [];
     const updating = [];
@@ -66,7 +72,7 @@ export default class Ecs {
       const entityId = parseInt(entityIdString);
       const components = patch[entityId];
       if (false === components) {
-        destroying.push(entityId);
+        destroying.add(entityId);
         continue;
       }
       const componentsToRemove = [];
@@ -82,22 +88,26 @@ export default class Ecs {
       if (componentsToRemove.length > 0) {
         removing.push([entityId, componentsToRemove]);
       }
-      if (this.$$entities[entityId]) {
+      if (this.$$entities[entityIdString]) {
-        const entity = this.$$entities[entityId];
+        const entity = this.$$entities[entityIdString];
+        let isInserting = false;
         const entityInserts = {};
+        let isUpdating = false;
         const entityUpdates = {};
         for (const componentName in componentsToUpdate) {
           if (entity[componentName]) {
             entityUpdates[componentName] = componentsToUpdate[componentName];
+            isUpdating = true;
           }
           else {
             entityInserts[componentName] = componentsToUpdate[componentName];
+            isInserting = true;
           }
         }
-        if (Object.keys(entityInserts).length > 0) {
+        if (isInserting) {
           inserting.push([entityId, entityInserts]);
         }
-        if (Object.keys(entityUpdates).length > 0) {
+        if (isUpdating) {
           updating.push([entityId, entityUpdates]);
         }
       }
@@ -105,9 +115,6 @@ export default class Ecs {
         creating.push([entityId, componentsToUpdate]);
       }
     }
-    if (destroying.length > 0) {
-      this.destroyMany(destroying);
-    }
     const promises = [];
     if (inserting.length > 0) {
       promises.push(this.insertMany(inserting));
@@ -119,11 +126,30 @@ export default class Ecs {
       promises.push(this.createManySpecific(creating));
     }
     await Promise.all(promises);
+    if (destroying.size > 0) {
+      this.destroyMany(destroying);
+    }
     if (removing.length > 0) {
       this.removeMany(removing);
     }
   }
 
+  applyDeferredChanges(entityId) {
+    const changes = this.deferredChanges[entityId];
+    delete this.deferredChanges[entityId];
+    for (const components of changes) {
+      this.markChange(entityId, components);
+    }
+  }
+
+  attach(entityIds) {
+    for (const entityId of entityIds) {
+      this.$$detached.delete(entityId);
+      this.$$reindexing.add(entityId);
+      this.applyDeferredChanges(entityId);
+    }
+  }
+
   changed(criteria) {
     const it = Object.entries(this.diff).values();
     return {
@@ -158,10 +184,27 @@ export default class Ecs {
     return entityId;
   }
 
+  async createDetached(components = {}) {
+    const [entityId] = await this.createManyDetached([components]);
+    return entityId;
+  }
+
   async createMany(componentsList) {
     const specificsList = [];
     for (const components of componentsList) {
-      specificsList.push([this.$$caret++, components]);
+      specificsList.push([this.$$caret, components]);
+      this.$$caret += 1;
+    }
+    return this.createManySpecific(specificsList);
+  }
+
+  async createManyDetached(componentsList) {
+    const specificsList = [];
+    for (const components of componentsList) {
+      specificsList.push([this.$$caret, components]);
+      this.$$detached.add(this.$$caret);
+      this.deferredChanges[this.$$caret] = [];
+      this.$$caret += 1;
     }
     return this.createManySpecific(specificsList);
   }
@@ -170,19 +213,20 @@ export default class Ecs {
     if (0 === specificsList.length) {
       return;
     }
-    const entityIds = [];
+    const entityIds = new Set();
     const creating = {};
     for (let i = 0; i < specificsList.length; i++) {
       const [entityId, components] = specificsList[i];
+      if (!this.$$detached.has(entityId)) {
         this.deferredChanges[entityId] = [];
+      }
       const componentNames = [];
       for (const componentName in components) {
         if (this.Components[componentName]) {
           componentNames.push(componentName);
         }
       }
-      entityIds.push(entityId);
+      entityIds.add(entityId);
-      this.rebuild(entityId, () => componentNames);
       for (const componentName of componentNames) {
         if (!creating[componentName]) {
           creating[componentName] = [];
@@ -197,28 +241,38 @@ export default class Ecs {
     }
     await Promise.all(promises);
     for (let i = 0; i < specificsList.length; i++) {
-      const [entityId] = specificsList[i];
+      const [entityId, components] = specificsList[i];
-      const changes = this.deferredChanges[entityId];
+      this.$$reindexing.add(entityId);
-      delete this.deferredChanges[entityId];
+      this.rebuild(entityId, () => Object.keys(components));
-      for (const components of changes) {
+      if (this.$$detached.has(entityId)) {
-        this.markChange(entityId, components);
+        continue;
       }
+      this.applyDeferredChanges(entityId);
     }
-    this.reindex(entityIds);
     return entityIds;
   }
 
   async createSpecific(entityId, components) {
-    return this.createManySpecific([[entityId, components]]);
+    const [created] = await this.createManySpecific([[entityId, components]]);
+    return created;
   }
 
   deindex(entityIds) {
+    // Stage 4 Draft / July 6, 2024
+    // const attached = entityIds.difference(this.$$detached);
+    const attached = new Set(entityIds);
+    for (const detached of this.$$detached) {
+      attached.delete(detached);
+    }
+    if (0 === attached.size) {
+      return;
+    }
     for (const systemName in this.Systems) {
       const System = this.Systems[systemName];
       if (!System.active) {
         continue;
       }
-      System.deindex(entityIds);
+      System.deindex(attached);
     }
   }
 
@@ -259,14 +313,11 @@ export default class Ecs {
     return dependencies.resolvers.promise;
   }
 
-  destroyAll() {
-    this.destroyMany(this.entities);
-  }
-
   destroyMany(entityIds) {
     const destroying = {};
-    this.deindex(entityIds);
+    // this.deindex(entityIds);
     for (const entityId of entityIds) {
+      this.$$deindexing.add(entityId);
       if (!this.$$entities[entityId]) {
         throw new Error(`can't destroy non-existent entity ${entityId}`);
       }
@@ -286,6 +337,13 @@ export default class Ecs {
     }
   }
 
+  detach(entityIds) {
+    for (const entityId of entityIds) {
+      this.$$deindexing.add(entityId);
+      this.$$detached.add(entityId);
+    }
+  }
+
   get entities() {
     const ids = [];
     for (const entity of Object.values(this.$$entities)) {
@@ -306,7 +364,6 @@ export default class Ecs {
     const inserting = {};
     const unique = new Set();
     for (const [entityId, components] of entities) {
-      this.rebuild(entityId, (componentNames) => [...new Set(componentNames.concat(Object.keys(components)))]);
       const diff = {};
       for (const componentName in components) {
         if (!inserting[componentName]) {
@@ -323,7 +380,10 @@ export default class Ecs {
       promises.push(this.Components[componentName].insertMany(inserting[componentName]));
     }
     await Promise.all(promises);
-    this.reindex(unique.values());
+    for (const [entityId, components] of entities) {
+      this.$$reindexing.add(entityId);
+      this.rebuild(entityId, (componentNames) => [...new Set(componentNames.concat(Object.keys(components)))]);
+    }
   }
 
   markChange(entityId, components) {
@@ -337,13 +397,7 @@ export default class Ecs {
     }
     // Created?
     else if (!this.diff[entityId]) {
-      const filtered = {};
+      this.diff[entityId] = components;
-      for (const componentName in components) {
-        filtered[componentName] = false === components[componentName]
-          ? false
-          : components[componentName];
-      }
-      this.diff[entityId] = filtered;
     }
     // Otherwise, merge.
     else {
@@ -415,12 +469,21 @@ export default class Ecs {
   }
 
   reindex(entityIds) {
+    // Stage 4 Draft / July 6, 2024
+    // const attached = entityIds.difference(this.$$detached);
+    const attached = new Set(entityIds);
+    for (const detached of this.$$detached) {
+      attached.delete(detached);
+    }
+    if (0 === attached.size) {
+      return;
+    }
     for (const systemName in this.Systems) {
       const System = this.Systems[systemName];
       if (!System.active) {
         continue;
       }
-      System.reindex(entityIds);
+      System.reindex(attached);
     }
   }
 
@@ -442,12 +505,14 @@ export default class Ecs {
         removing[componentName].push(entityId);
       }
       this.markChange(entityId, diff);
-      this.rebuild(entityId, (componentNames) => componentNames.filter((type) => !components.includes(type)));
     }
     for (const componentName in removing) {
       this.Components[componentName].destroyMany(removing[componentName]);
     }
-    this.reindex(unique);
+    for (const [entityId, components] of entities) {
+      this.$$reindexing.add(entityId);
+      this.rebuild(entityId, (componentNames) => componentNames.filter((type) => !components.includes(type)));
+    }
   }
 
   static serialize(ecs, view) {
@@ -468,6 +533,7 @@ export default class Ecs {
   }
 
   tick(elapsed) {
+    // tick systems
     for (const systemName in this.Systems) {
       const System = this.Systems[systemName];
       if (!System.active) {
@@ -483,6 +549,7 @@ export default class Ecs {
         System.elapsed -= System.frequency;
       }
     }
+    // destroy entities
     const destroying = new Set();
     for (const [entityId, {promises}] of this.$$destructionDependencies) {
       if (0 === promises.size) {
@@ -496,6 +563,15 @@ export default class Ecs {
         this.$$destructionDependencies.delete(entityId);
       }
     }
+    // update indices
+    if (this.$$deindexing.size > 0) {
+      this.deindex(this.$$deindexing);
+      this.$$deindexing.clear();
+    }
+    if (this.$$reindexing.size > 0) {
+      this.reindex(this.$$reindexing);
+      this.$$reindexing.clear();
+    }
   }
 
   toJSON() {
@@ -528,6 +604,7 @@ export default class Ecs {
         }
         updating[componentName].push([entityId, components[componentName]]);
       }
+      this.$$reindexing.add(entityId);
       unique.add(entityId);
     }
     const promises = [];
@@ -535,7 +612,6 @@ export default class Ecs {
       promises.push(this.Components[componentName].updateMany(updating[componentName]));
     }
     await Promise.all(promises);
-    this.reindex(unique.values());
   }
 
 }

app/ecs/ecs.test.js

@@ -110,11 +110,11 @@ test('destroys entities', async () => {
     .to.deep.equal(JSON.stringify({Empty: {}, Position: {y: 128}}));
   expect(ecs.get(entity))
     .to.not.be.undefined;
-  ecs.destroyAll();
+  ecs.destroyMany(new Set([entity]));
   expect(ecs.get(entity))
     .to.be.undefined;
   expect(() => {
-    ecs.destroyMany([entity]);
+    ecs.destroyMany(new Set([entity]));
   })
     .to.throw();
 });
@@ -122,10 +122,10 @@ test('destroys entities', async () => {
 test('inserts components into entities', async () => {
   const ecs = new Ecs({Components: {Empty, Position}});
   const entity = await ecs.create({Empty: {}});
-  ecs.insert(entity, {Position: {y: 128}});
+  await ecs.insert(entity, {Position: {y: 128}});
   expect(JSON.stringify(ecs.get(entity)))
     .to.deep.equal(JSON.stringify({Empty: {}, Position: {y: 128}}));
-  ecs.insert(entity, {Position: {y: 64}});
+    await ecs.insert(entity, {Position: {y: 64}});
   expect(JSON.stringify(ecs.get(entity)))
     .to.deep.equal(JSON.stringify({Empty: {}, Position: {y: 64}}));
 });
@@ -197,6 +197,39 @@ test('schedules entities to be deleted when ticking systems', async () => {
     .to.be.undefined;
 });
 
+test('skips indexing detached entities', async () => {
+  const ecs = new Ecs({
+    Components: {Empty},
+    Systems: {
+      Indexer: class extends System {
+        static queries() {
+          return {
+            default: ['Empty'],
+          };
+        }
+      },
+    },
+  });
+  const {$$map: map} = ecs.system('Indexer').queries.default;
+  ecs.system('Indexer').active = true;
+  const attached = await ecs.create({Empty: {}});
+  ecs.tick(0);
+  expect(Array.from(map.keys()))
+    .to.deep.equal([attached]);
+  ecs.destroyMany(new Set([attached]));
+  ecs.tick(0);
+  expect(Array.from(map.keys()))
+    .to.deep.equal([]);
+  const detached = await ecs.createDetached({Empty: {}});
+  ecs.tick(0);
+  expect(Array.from(map.keys()))
+    .to.deep.equal([]);
+  ecs.destroyMany(new Set([detached]));
+  ecs.tick(0);
+  expect(Array.from(map.keys()))
+    .to.deep.equal([]);
+});
+
 test('generates diffs for entity creation', async () => {
   const ecs = new Ecs();
   let entity;
@@ -210,7 +243,7 @@ test('generates diffs for adding and removing components', async () => {
   let entity;
   entity = await ecs.create();
   ecs.setClean();
-  ecs.insert(entity, {Position: {x: 64}});
+  await ecs.insert(entity, {Position: {x: 64}});
   expect(ecs.diff)
     .to.deep.equal({[entity]: {Position: {x: 64}}});
   ecs.setClean();
@@ -246,6 +279,23 @@ test('generates diffs for entity mutations', async () => {
     .to.deep.equal({});
 });
 
+test('generates no diffs for detached entities', async () => {
+  const ecs = new Ecs({Components: {Position}});
+  let entity;
+  entity = await ecs.createDetached();
+  expect(ecs.diff)
+    .to.deep.equal({});
+  await ecs.insert(entity, {Position: {x: 64}});
+  expect(ecs.diff)
+    .to.deep.equal({});
+  ecs.get(entity).Position.x = 128;
+  expect(ecs.diff)
+    .to.deep.equal({});
+  ecs.remove(entity, ['Position']);
+  expect(ecs.diff)
+    .to.deep.equal({});
+});
+
 test('generates coalesced diffs for components', async () => {
   const ecs = new Ecs({Components: {Position}});
   let entity;
@@ -253,7 +303,7 @@ test('generates coalesced diffs for components', async () => {
   ecs.remove(entity, ['Position']);
   expect(ecs.diff)
     .to.deep.equal({[entity]: {Position: false}});
-  ecs.insert(entity, {Position: {}});
+  await ecs.insert(entity, {Position: {}});
   expect(ecs.diff)
     .to.deep.equal({[entity]: {Position: {}}});
 });
@@ -290,11 +340,11 @@ test('applies creation patches', async () => {
     .to.equal(64);
 });
 
-test('applies update patches', () => {
+test('applies update patches', async () => {
   const ecs = new Ecs({Components: {Position}});
-  ecs.createSpecific(16, {Position: {x: 64}});
+  await ecs.createSpecific(16, {Position: {x: 64}});
-  ecs.apply({16: {Position: {x: 128}}});
+  await ecs.apply({16: {Position: {x: 128}}});
-  expect(Array.from(ecs.entities).length)
+  expect(Object.keys(ecs.$$entities).length)
     .to.equal(1);
   expect(ecs.get(16).Position.x)
     .to.equal(128);
@@ -318,9 +368,9 @@ test('applies component deletion patches', async () => {
     .to.deep.equal(['Position']);
 });
 
-test('calculates entity size', () => {
+test('calculates entity size', async () => {
   const ecs = new Ecs({Components: {Empty, Position}});
-  ecs.createSpecific(1, {Empty: {}, Position: {}});
+  await ecs.createSpecific(1, {Empty: {}, Position: {}});
   // ID + # of components + Empty + Position + x + y + z
   // 4  + 2               + 2 + 4 + 2 + 4    + 4 + 4 + 4 = 30
   expect(ecs.get(1).size())
@@ -329,8 +379,8 @@ test('calculates entity size', () => {
 
 test('serializes and deserializes', async () => {
   const ecs = new Ecs({Components: {Empty, Name, Position}});
-  ecs.createSpecific(1, {Empty: {}, Position: {x: 64}});
+  await ecs.createSpecific(1, {Empty: {}, Position: {x: 64}});
-  ecs.createSpecific(16, {Name: {name: 'foobar'}, Position: {x: 128}});
+  await ecs.createSpecific(16, {Name: {name: 'foobar'}, Position: {x: 128}});
   expect(ecs.toJSON())
     .to.deep.equal({
       entities: {
@@ -362,8 +412,8 @@ test('serializes and deserializes', async () => {
 
 test('deserializes from compatible ECS', async () => {
   const ecs = new Ecs({Components: {Empty, Name, Position}});
-  ecs.createSpecific(1, {Empty: {}, Position: {x: 64}});
+  await ecs.createSpecific(1, {Empty: {}, Position: {x: 64}});
-  ecs.createSpecific(16, {Name: {name: 'foobar'}, Position: {x: 128}});
+  await ecs.createSpecific(16, {Name: {name: 'foobar'}, Position: {x: 128}});
   const view = Ecs.serialize(ecs);
   const deserialized = await Ecs.deserialize(
     new Ecs({Components: {Empty, Name}}),

app/ecs/entity-factory.js

@@ -23,6 +23,9 @@ export default class EntityFactory {
         static componentNames = sorted;
         constructor(id) {
           this.id = id;
+          for (const type of sorted) {
+            this[type] = Components[type].get(id);
+          }
         }
         size() {
           let size = 0;
@@ -34,15 +37,6 @@ export default class EntityFactory {
           return size + 4 + 2;
         }
       }
-      const properties = {};
-      for (const type of sorted) {
-        properties[type] = {};
-        const get = Components[type].get.bind(Components[type]);
-        properties[type].get = function() {
-          return get(this.id);
-        };
-      }
-      Object.defineProperties(Entity.prototype, properties);
       Entity.prototype.updateAttachments = new Function('update', `
         ${
           sorted

app/ecs/query.js

@@ -2,7 +2,7 @@ export default class Query {
 
   $$criteria = {with: [], without: []};
   $$ecs;
-  $$index = new Set();
+  $$map = new Map();
 
   constructor(parameters, ecs) {
     this.$$ecs = ecs;
@@ -20,19 +20,19 @@ export default class Query {
   }
 
   get count() {
-    return this.$$index.size;
+    return this.$$map.size;
   }
 
   deindex(entityIds) {
     for (const entityId of entityIds) {
-      this.$$index.delete(entityId);
+      this.$$map.delete(entityId);
     }
   }
 
   reindex(entityIds) {
     if (0 === this.$$criteria.with.length && 0 === this.$$criteria.without.length) {
       for (const entityId of entityIds) {
-        this.$$index.add(entityId);
+        this.$$map.set(entityId, this.$$ecs.get(entityId));
       }
       return;
     }
@@ -53,28 +53,16 @@ export default class Query {
         }
       }
       if (should) {
-        this.$$index.add(entityId);
+        this.$$map.set(entityId, this.$$ecs.get(entityId));
       }
       else if (!should) {
-        this.$$index.delete(entityId);
+        this.$$map.delete(entityId);
       }
     }
   }
 
   select() {
-    const it = this.$$index.values();
+    return this.$$map.values();
-    return {
-      [Symbol.iterator]() {
-        return this;
-      },
-      next: () => {
-        const result = it.next();
-        if (result.done) {
-          return {done: true, value: undefined};
-        }
-        return {done: false, value: this.$$ecs.get(result.value)};
-      },
-    };
   }
 
 }

app/ecs/query.test.js

@@ -1,37 +1,39 @@
 import {expect, test} from 'vitest';
 
+import Ecs from './ecs';
 import Component from './component.js';
 import Query from './query.js';
 
-function wrapProperties(name, properties) {
+const Components = [
-  return class WrappedComponent extends Component {
+  ['A', {a: {type: 'int32', defaultValue: 64}}],
-    static name = name;
+  ['B', {b: {type: 'int32', defaultValue: 32}}],
+  ['C', {c: {type: 'int32'}}],
+]
+  .reduce((Components, [componentName, properties]) => {
+    return {
+      ...Components,
+      [componentName]: class extends Component {
+        static componentName = componentName;
         static properties = properties;
+      },
     };
-}
+  }, {})
 
-const A = new (wrapProperties('A', {a: {type: 'int32', defaultValue: 420}}));
+const ecsTest = test.extend({
-const B = new (wrapProperties('B', {b: {type: 'int32', defaultValue: 69}}));
+  ecs: async ({}, use) => {
-const C = new (wrapProperties('C', {c: {type: 'int32'}}));
+    const ecs = new Ecs({Components});
-
+    await ecs.createManySpecific([
-const Components = {A, B, C};
+      [1, {B: {}}],
-Components.A.createMany([[2], [3]]);
+      [2, {A: {}, B: {}, C: {}}],
-Components.B.createMany([[1], [2]]);
+      [3, {A: {}}],
-Components.C.createMany([[2], [4]]);
+      [4, {C: {}}],
-
+    ]);
-const fakeEcs = (Components) => ({
+    await use(ecs);
-  Components,
-  get(id) {
-    return Object.fromEntries(
-      Object.entries(Components)
-        .map(([componentName, Component]) => [componentName, Component.get(id)])
-        .concat([['id', id]])
-    );
   },
 });
 
-function testQuery(parameters, expected) {
+async function testQuery(ecs, parameters, expected) {
-  const query = new Query(parameters, fakeEcs(Components));
+  const query = new Query(parameters, ecs);
   query.reindex([1, 2, 3]);
   expect(query.count)
     .to.equal(expected.length);
@@ -41,22 +43,22 @@ function testQuery(parameters, expected) {
   }
 }
 
-test('can query all', () => {
+ecsTest('can query all', async ({ecs}) => {
-  testQuery([], [1, 2, 3]);
+  await testQuery(ecs, [], [1, 2, 3]);
 });
 
-test('can query some', () => {
+ecsTest('can query some', async ({ecs}) => {
-  testQuery(['A'], [2, 3]);
+  await testQuery(ecs, ['A'], [2, 3]);
-  testQuery(['A', 'B'], [2]);
+  await testQuery(ecs, ['A', 'B'], [2]);
 });
 
-test('can query excluding', () => {
+ecsTest('can query excluding', async ({ecs}) => {
-  testQuery(['!A'], [1]);
+  await testQuery(ecs, ['!A'], [1]);
-  testQuery(['A', '!B'], [3]);
+  await testQuery(ecs, ['A', '!B'], [3]);
 });
 
-test('can deindex', () => {
+ecsTest('can deindex', async ({ecs}) => {
-  const query = new Query(['A'], fakeEcs(Components));
+  const query = new Query(['A'], ecs);
   query.reindex([1, 2, 3]);
   expect(query.count)
     .to.equal(2);
@@ -65,24 +67,22 @@ test('can deindex', () => {
     .to.equal(1);
 });
 
-test('can reindex', () => {
+ecsTest('can reindex', async ({ecs}) => {
-  const Test = new (wrapProperties('Test', {a: {type: 'int32', defaultValue: 420}}));
+  const query = new Query(['B'], ecs);
-  Test.createMany([[2], [3]]);
+  query.reindex([1, 2]);
-  const query = new Query(['Test'], fakeEcs({Test}));
-  query.reindex([2, 3]);
   expect(query.count)
     .to.equal(2);
-  Test.destroy(2);
+  ecs.destroyMany(new Set([2]));
-  query.reindex([2, 3]);
+  query.reindex([1, 2]);
   expect(query.count)
     .to.equal(1);
 });
 
-test('can select', () => {
+ecsTest('can select', async ({ecs}) => {
-  const query = new Query(['A'], fakeEcs(Components));
+  const query = new Query(['A'], ecs);
   query.reindex([1, 2, 3]);
   const it = query.select();
   const {value: {A}} = it.next();
   expect(A.a)
-    .to.equal(420);
+    .to.equal(64);
 });

app/ecs/schema.js

@@ -35,6 +35,7 @@ export default class Schema {
     return {
       $: this.$$types[type],
       concrete: $$type.normalize ? $$type.normalize(rest) : rest,
+      type,
     };
   }
 

app/ecs/system.js

@@ -20,7 +20,6 @@ export default class System {
     for (const i in queries) {
       this.queries[i] = new Query(queries[i], ecs);
     }
-    this.reindex(ecs.entities);
   }
 
   deindex(entityIds) {
@@ -45,6 +44,10 @@ export default class System {
     }
   }
 
+  schedule() {
+    this.elapsed = this.frequency;
+  }
+
   select(query) {
     return this.queries[query].select();
   }

app/ecs/systems/integrate-physics.js

@@ -10,8 +10,8 @@ export default class IntegratePhysics extends System {
 
   tick(elapsed) {
     for (const {Position, Forces} of this.select('default')) {
-      Position.x += elapsed * (Forces.impulseX + Forces.forceX);
+      Position.x = Position.$$x + elapsed * (Forces.$$impulseX + Forces.$$forceX);
-      Position.y += elapsed * (Forces.impulseY + Forces.forceY);
+      Position.y = Position.$$y + elapsed * (Forces.$$impulseY + Forces.$$forceY);
     }
   }
 

app/ecs/systems/maintain-collider-hash.js

@@ -54,9 +54,11 @@ export default class MaintainColliderHash extends System {
 
   within(query) {
     const within = new Set();
+    if (this.hash) {
       for (const id of this.hash.within(query)) {
         within.add(this.ecs.get(id));
       }
+    }
     return within;
   }
 

app/particles/emitter.js

@@ -1,22 +1,50 @@
 import K from 'kefir';
 
+import * as easings from '@/util/easing.js';
+import {TAU} from '@/util/math.js';
+
 export default class Emitter {
   constructor(ecs) {
     this.ecs = ecs;
     this.scheduled = [];
   }
-  async allocate({entity, shape}) {
+  async configure(entityId, {fields, shape}) {
-    const allocated = this.ecs.get(await this.ecs.create(entity));
+    const entity = this.ecs.get(entityId);
     if (shape) {
       switch (shape.type) {
+        case 'circle': {
+          const r = Math.random() * TAU;
+          entity.Position.x += Math.cos(r) * shape.payload.radius;
+          entity.Position.y += Math.sin(r) * shape.payload.radius;
+          break;
+        }
+        case 'filledCircle': {
+          const r = Math.random() * TAU;
+          entity.Position.x += Math.cos(r) * Math.random() * shape.payload.radius;
+          entity.Position.y += Math.sin(r) * Math.random() * shape.payload.radius;
+          break;
+        }
         case 'filledRect': {
-          allocated.Position.x += Math.random() * shape.payload.width - (shape.payload.width / 2);
+          entity.Position.x += Math.random() * shape.payload.width - (shape.payload.width / 2);
-          allocated.Position.y += Math.random() * shape.payload.height - (shape.payload.height / 2);
+          entity.Position.y += Math.random() * shape.payload.height - (shape.payload.height / 2);
           break;
         }
       }
     }
-    return allocated;
+    if (fields) {
+      for (const {easing = 'linear', path, value} of fields) {
+        let walk = entity;
+        const pathCopy = path.slice(0);
+        const final = pathCopy.pop();
+        for (const key of pathCopy) {
+          walk = walk[key];
+        }
+        const c = Math.random() * (value.length - 1);
+        const i = Math.floor(c);
+        walk[final] = easings[easing](c - i, value[i], value[i + 1] - value[i], 1);
+      }
+    }
+    return entity;
   }
   emit(particle) {
     particle = {
@@ -24,59 +52,60 @@ export default class Emitter {
       entity: {
         Position: {},
         Sprite: {},
-        VisibleAabb: {},
         ...particle.entity,
       },
     }
     let {count = 1} = particle;
-    const {frequency = 0} = particle;
+    const {entity, frequency = 0, spurt = 1, ttl = 0} = particle;
-    const stream = K.stream((emitter) => {
+    if (ttl > 0) {
-      if (0 === frequency) {
+      count = Math.floor(ttl / frequency);
-        const promises = [];
+    }
-        for (let i = 0; i < count; ++i) {
+    const specifications = Array(count);
-          promises.push(
+    for (let i = 0; i < count * spurt; ++i) {
-            this.allocate(particle)
+      specifications[i] = entity;
-              .then((entity) => {
+    }
-                emitter.emit(entity);
+    const stream = K.stream(async (emitter) => {
-              }),
+      const entityIds = await this.ecs.createManyDetached(specifications);
-          );
+      if (0 === frequency) {
+        this.ecs.attach(entityIds);
+        for (const entityId of entityIds) {
+          emitter.emit(this.configure(entityId, particle));
         }
-        Promise.all(promises)
-          .then(() => {
         emitter.end();
-          });
         return;
       }
-      const promise = this.allocate(particle)
+      const it = entityIds.values();
-        .then((entity) => {
+      const batch = new Set();
-          emitter.emit(entity);
+      for (let i = 0; i < spurt; ++i) {
-        });
+        batch.add(it.next().value);
+      }
+      this.ecs.attach(batch);
+      for (const entityId of batch) {
+        emitter.emit(this.configure(entityId, particle));
+      }
       count -= 1;
       if (0 === count) {
-        promise.then(() => {
         emitter.end();
-        });
         return;
       }
-      const promises = [promise];
       let accumulated = 0;
       const scheduled = (elapsed) => {
         accumulated += elapsed;
         while (accumulated > frequency && count > 0) {
-          promises.push(
+          const batch = new Set();
-            this.allocate(particle)
+          for (let i = 0; i < spurt; ++i) {
-              .then((entity) => {
+            batch.add(it.next().value);
-                emitter.emit(entity);
+          }
-              }),
+          this.ecs.attach(batch);
-          );
+          for (const entityId of batch) {
+            emitter.emit(this.configure(entityId, particle));
+          }
           accumulated -= frequency;
           count -= 1;
         }
         if (0 === count) {
           this.scheduled.splice(this.scheduled.indexOf(scheduled), 1);
-          Promise.all(promises).then(() => {
           emitter.end();
-          });
         }
       };
       this.scheduled.push(scheduled);

app/particles/emitter.test.js

@@ -32,10 +32,8 @@ test('emits particles over time', async () => {
     current.onValue(resolve);
   }))
     .to.deep.include({id: 1});
-  expect(ecs.get(1))
+  expect(Array.from(ecs.$$detached))
-    .to.not.be.undefined;
+    .to.deep.equal([2]);
-  expect(ecs.get(2))
-    .to.be.undefined;
   emitter.tick(0.06);
   expect(await new Promise((resolve) => {
     current.onValue(resolve);
@@ -47,6 +45,6 @@ test('emits particles over time', async () => {
     current.onValue(resolve);
   }))
     .to.deep.include({id: 2});
-  expect(ecs.get(2))
+  expect(Array.from(ecs.$$detached))
-    .to.not.be.undefined;
+    .to.deep.equal([]);
 });

app/react/components/devtools.jsx

@@ -1,8 +1,8 @@
-import {useState} from 'react';
+import {useCallback, useState} from 'react';
 import {Tab, Tabs, TabList, TabPanel} from 'react-tabs';
 import 'react-tabs/style/react-tabs.css';
 
-import {useEcs, useEcsTick} from '@/react/context/ecs.js';
+import {useEcsTick} from '@/react/context/ecs.js';
 import {useMainEntity} from '@/react/context/main-entity.js';
 
 import styles from './devtools.module.css';
@@ -12,15 +12,15 @@ import Tiles from './devtools/tiles.jsx';
 export default function Devtools({
   eventsChannel,
 }) {
-  const [ecs] = useEcs();
   const [mainEntity] = useMainEntity();
   const [mainEntityJson, setMainEntityJson] = useState('');
-  useEcsTick(() => {
+  const onEcsTick = useCallback((payload, ecs) => {
-    if (!ecs || !mainEntity) {
+    if (!mainEntity) {
       return;
     }
     setMainEntityJson(JSON.stringify(ecs.get(mainEntity), null, 2));
-  }, [ecs, mainEntity]);
+  }, [mainEntity]);
+  useEcsTick(onEcsTick);
   return (
     <div className={styles.devtools}>
       <Tabs>

app/react/components/dom/damages.jsx

@@ -1,6 +1,7 @@
 import {memo, useCallback, useRef} from 'react';
 
 import {DamageTypes} from '@/ecs/components/vulnerable.js';
+import {useEcsTick} from '@/react/context/ecs.js';
 import useAnimationFrame from '@/react/hooks/use-animation-frame.js';
 import {easeInOutExpo, easeInQuint, easeOutQuad, linear} from '@/util/easing.js';
 
@@ -25,142 +26,143 @@ function damageHue(type) {
   return hue;
 }
 
-function createDamageNode() {
+class Damage {
-  const damage = document.createElement('div');
+  elapsed = 0;
-  damage.classList.add(styles.damage);
+  hue = [0, 30];
-  damage.appendChild(document.createElement('p'));
+  offsetX = 0;
-  return damage;
+  offsetY = 0;
+  step = 0;
+  constructor() {
+    const element = document.createElement('div');
+    element.classList.add(styles.damage);
+    element.appendChild(document.createElement('p'));
+    this.element = element;
+  }
+  reset(key, scale, {amount, position, type}) {
+    this.elapsed = 0;
+    [this.hueStart, this.hueEnd] = damageHue(type);
+    this.offsetX = 20 * scale * 1 * (Math.random() - 0.5);
+    this.offsetY = -1 * (10 + Math.random() * 45 * scale);
+    this.step = 0;
+    const {element} = this;
+    element.style.setProperty('rotate', `${Math.random() * (Math.PI / 16) - (Math.PI / 32)}rad`);
+    element.style.setProperty('--magnitude', Math.max(1, Math.floor(Math.log10(Math.abs(amount)))));
+    element.style.setProperty('--positionX', `${position.x * scale}px`);
+    element.style.setProperty('--positionY', `${position.y * scale}px`);
+    element.style.setProperty('zIndex', key);
+    const p = element.querySelector('p');
+    p.style.scale = scale / 2;
+    p.innerText = Math.abs(amount);
+  }
+  tick(elapsed, stepSize) {
+    this.elapsed += elapsed;
+    this.step += elapsed;
+    // offset
+    let offsetX = 0, offsetY = 0;
+    if (this.elapsed <= 0.5) {
+      offsetX = easeOutQuad(this.elapsed, 0, this.offsetX, 0.5);
+      offsetY = easeOutQuad(this.elapsed, 0, this.offsetY, 0.5);
+    }
+    else if (this.elapsed > 1.375) {
+      offsetX = easeOutQuad(this.elapsed - 1.375, this.offsetX, -this.offsetX, 0.125);
+      offsetY = easeOutQuad(this.elapsed - 1.375, this.offsetY, -this.offsetY, 0.125);
+    }
+    else {
+      offsetX = this.offsetX;
+      offsetY = this.offsetY;
+    }
+    this.element.style.setProperty('--offsetX', offsetX);
+    this.element.style.setProperty('--offsetY', offsetY);
+    if (this.step > stepSize) {
+      this.step = this.step % stepSize;
+      // scale
+      let scale = 0.35;
+      if (this.elapsed <= 0.5) {
+        scale = easeOutQuad(this.elapsed, 0, 1, 0.5);
+      }
+      else if (this.elapsed > 0.5 && this.elapsed < 0.6) {
+        scale = linear(this.elapsed - 0.5, 1, 0.5, 0.1);
+      }
+      else if (this.elapsed > 0.6 && this.elapsed < 0.675) {
+        scale = easeInQuint(this.elapsed - 0.6, 1, 0.25, 0.075);
+      }
+      else if (this.elapsed > 0.675 && this.elapsed < 1.375) {
+        scale = 1;
+      }
+      else if (this.elapsed > 1.375) {
+        scale = easeOutQuad(this.elapsed - 1.375, 1, -1, 0.125);
+      }
+      this.element.style.setProperty('--scale', scale);
+      // opacity
+      let opacity = 0.75;
+      if (this.elapsed <= 0.375) {
+        opacity = linear(this.elapsed, 0.75, 0.25, 0.375);
+      }
+      else if (this.elapsed > 0.375 && this.elapsed < 1.375) {
+        opacity = 1;
+      }
+      else if (this.elapsed > 1.375) {
+        opacity = linear(this.elapsed - 1.375, 1, -1, 0.125);
+      }
+      this.element.style.setProperty('--opacity', opacity);
+      // hue
+      this.element.style.setProperty(
+        '--hue',
+        easeInOutExpo(
+          Math.abs((this.elapsed % 0.3) - 0.15) / 0.15,
+          this.hueStart,
+          this.hueEnd,
+          1,
+        ),
+      );
+    }
+  }
 }
 
-function Damages({damages, scale}) {
+function Damages({scale}) {
-  const animations = useRef({});
+  const damages = useRef({});
-  const pool = useRef([]);
   const damagesRef = useRef();
+  const pool = useRef([]);
+  const onEcsTick = useCallback((payload) => {
+    for (const id in payload) {
+      const update = payload[id];
+      if (false === update || !update.Vulnerable?.damage) {
+        continue;
+      }
+      const {damage: damageUpdate} = update.Vulnerable;
+      for (const key in damageUpdate) {
+        const damage = pool.current.length > 0 ? pool.current.pop() : new Damage();
+        damage.reset(key, scale, damageUpdate[key]);
+        damages.current[key] = damage;
+        damagesRef.current.appendChild(damage.element);
+      }
+    }
+  }, [scale]);
+  useEcsTick(onEcsTick);
   const frame = useCallback((elapsed) => {
     if (!damagesRef.current) {
       return;
     }
-    if (0 === pool.current.length) {
+    const keys = Object.keys(damages.current);
-      for (let i = 0; i < 512; ++i) {
+    if (0 === keys.length && 0 === pool.current.length) {
-        const damage = createDamageNode();
+      for (let i = 0; i < 500; ++i) {
-        damagesRef.current.appendChild(damage);
+        pool.current.push(new Damage());
+      }
+    }
+    const stepSize = keys.length > 150 ? (keys.length / 500) * 0.5 : elapsed;
+    for (const key of keys) {
+      const damage = damages.current[key];
+      damage.tick(elapsed, stepSize);
+      if (damage.elapsed > 1.5) {
+        damagesRef.current.removeChild(damage.element);
+        delete damages.current[key];
+        if (pool.current.length < 1000) {
           pool.current.push(damage);
         }
       }
-    const keys = Object.keys(animations.current);
-    for (const key of keys) {
-      const animation = animations.current[key];
-      if (!damages[key]) {
-        if (animation.element) {
-          if (pool.current.length < 512) {
-            pool.current.push(animation.element);
     }
-          animation.element = undefined;
+  }, []);
-        }
-        delete animations.current[key];
-        continue;
-      }
-      if (!animation.element) {
-        const {amount, position} = damages[key];
-        let damage;
-        if (pool.current.length > 0) {
-          damage = pool.current.pop();
-        }
-        else {
-          damage = createDamageNode();
-          damagesRef.current.appendChild(damage);
-        }
-        const p = damage.querySelector('p');
-        p.style.scale = scale / 2;
-        p.innerText = Math.abs(amount);
-        damage.style.setProperty('--randomnessX', animation['--randomnessX']);
-        damage.style.setProperty('--randomnessY', animation['--randomnessY']);
-        damage.style.setProperty('rotate', animation['rotate']);
-        damage.style.setProperty('rotate', animation['rotate']);
-        damage.style.setProperty('--magnitude', Math.max(1, Math.floor(Math.log10(Math.abs(amount)))));
-        damage.style.setProperty('--positionX', `${position.x * scale}px`);
-        damage.style.setProperty('--positionY', `${position.y * scale}px`);
-        damage.style.setProperty('zIndex', key);
-        animation.element = damage;
-      }
-      animation.elapsed += elapsed;
-      animation.step += elapsed;
-      const offsetX = 20 * scale * animation['--randomnessX'];
-      const offsetY = -1 * (10 + animation['--randomnessY'] * 45 * scale);
-      // offset
-      if (animation.elapsed <= 0.5) {
-        animation['--offsetX'] = easeOutQuad(animation.elapsed, 0, offsetX, 0.5);
-        animation['--offsetY'] = easeOutQuad(animation.elapsed, 0, offsetY, 0.5);
-      }
-      else if (animation.elapsed > 1.375) {
-        animation['--offsetX'] = offsetX - easeOutQuad(animation.elapsed - 1.375, 0, offsetX, 0.125);
-        animation['--offsetY'] = offsetY - easeOutQuad(animation.elapsed - 1.375, 0, offsetY, 0.125);
-      }
-      // scale
-      if (animation.elapsed <= 0.5) {
-        animation['--scale'] = easeOutQuad(animation.elapsed, 0, 1, 0.5);
-      }
-      else if (animation.elapsed > 0.5 && animation.elapsed < 0.6) {
-        animation['--scale'] = linear(animation.elapsed - 0.5, 1, 0.5, 0.1);
-      }
-      else if (animation.elapsed > 0.6 && animation.elapsed < 0.675) {
-        animation['--scale'] = 1.5 - easeInQuint(animation.elapsed - 0.6, 1, 0.5, 0.075);
-      }
-      else if (animation.elapsed > 0.675 && animation.elapsed < 1.375) {
-        animation['--scale'] = 1;
-      }
-      else if (animation.elapsed > 1.375) {
-        animation['--scale'] = 1 - easeOutQuad(animation.elapsed - 1.375, 0, 1, 0.125);
-      }
-      // fade
-      if (animation.elapsed <= 0.375) {
-        animation['--opacity'] = linear(animation.elapsed, 0.75, 0.25, 0.375);
-      }
-      else if (animation.elapsed > 0.375 && animation.elapsed < 1.375) {
-        animation['--opacity'] = 1;
-      }
-      else if (animation.elapsed > 1.375) {
-        animation['--opacity'] = 1 - linear(animation.elapsed - 1.375, 0, 1, 0.125);
-      }
-      // hue
-      const h = Math.abs((animation.elapsed % 0.3) - 0.15) / 0.15;
-      animation['--hue'] = easeInOutExpo(h, animation.hue[0], animation.hue[1], 1);
-      const step = keys.length > 150 ? (keys.length / 500) * 0.25 : elapsed;
-      if (animation.step > step) {
-        animation.step = animation.step % step;
-        animation.element.style.setProperty('--hue', animation['--hue']);
-        animation.element.style.setProperty('--opacity', animation['--opacity']);
-        animation.element.style.setProperty('--offsetX', animation['--offsetX']);
-        animation.element.style.setProperty('--offsetY', animation['--offsetY']);
-        animation.element.style.setProperty('--scale', animation['--scale']);
-      }
-      if (animation.elapsed > 1.5) {
-        if (pool.current.length < 512) {
-          pool.current.push(animation.element);
-        }
-        animation.element.style.setProperty('--opacity', 0);
-        animation.element = undefined;
-        damages[key].onClose();
-      }
-    }
-  }, [damages, scale]);
   useAnimationFrame(frame);
-  for (const key in damages) {
-    if (!animations.current[key]) {
-      animations.current[key] = {
-        elapsed: 0,
-        hue: damageHue(damages[key].type),
-        rotate: `${Math.random() * (Math.PI / 16) - (Math.PI / 32)}rad`,
-        step: 0,
-        '--scale': 0.35,
-        '--opacity': 0.75,
-        '--offsetX': 0,
-        '--offsetY': 0,
-        '--randomnessX': 1 * (Math.random() - 0.5),
-        '--randomnessY': Math.random(),
-      };
-    }
-  }
   return (
     <div
       className={styles.damages}

app/react/components/dom/damages.module.css

@@ -23,22 +23,10 @@
   inherits: false;
   syntax: '<number>';
 }
-@property --randomnessX {
-  initial-value: 0;
-  inherits: false;
-  syntax: '<number>';
-}
-@property --randomnessY {
-  initial-value: 0;
-  inherits: false;
-  syntax: '<number>';
-}
 
 .damage {
   --hue: 0;
   --opacity: 0.75;
-  --randomnessX: 0;
-  --randomnessY: 0;
   --scale: 0.35;
   --background: hsl(var(--hue) 100% 12.5%);
   --foreground: hsl(var(--hue) 100% 50%);

app/react/components/dom/dialogue.jsx

@@ -1,7 +1,8 @@
-import {useEffect, useMemo, useRef, useState} from 'react';
+import {useCallback, useEffect, useMemo, useRef, useState} from 'react';
 
 import {useDomScale} from '@/react/context/dom-scale.js';
 import {useRadians} from '@/react/context/radians.js';
+import useAnimationFrame from '@/react/hooks/use-animation-frame.js';
 import {RESOLUTION} from '@/util/constants.js';
 import {render} from '@/util/dialogue.js';
 
@@ -56,20 +57,13 @@ export default function Dialogue({
       clearTimeout(handle);
     }
   }, [caret, dialogue]);
-  useEffect(() => {
+  const updateDimensions = useCallback(() => {
-    let handle;
-    function track() {
     if (ref.current) {
       const {height, width} = ref.current.getBoundingClientRect();
       setDimensions({h: height / domScale, w: width / domScale});
     }
-      handle = requestAnimationFrame(track);
+  }, [domScale]);
-    }
+  useAnimationFrame(updateDimensions);
-    handle = requestAnimationFrame(track);
-    return () => {
-      cancelAnimationFrame(handle);
-    };
-  }, [dialogue, domScale, ref]);
   const localRender = useMemo(
     () => render(dialogue.letters, styles.letter),
     [dialogue.letters],

app/react/components/dom/dialogue.module.css

@@ -17,6 +17,7 @@
   ;
   top: 0;
   transform: translate(-50%, -50%);
+  transition: translate 100ms;
   user-select: none;
   max-width: 66%;
 }

app/react/components/dom/entities.jsx

@@ -1,7 +1,7 @@
-import {useState} from 'react';
+import {useCallback, useState} from 'react';
 
 import {usePacket} from '@/react/context/client.js';
-import {useEcs, useEcsTick} from '@/react/context/ecs.js';
+import {useEcsTick} from '@/react/context/ecs.js';
 import {parseLetters} from '@/util/dialogue.js';
 
 import Damages from './damages.jsx';
@@ -13,17 +13,11 @@ export default function Entities({
   setChatMessages,
   setMonopolizers,
 }) {
-  const [ecs] = useEcs();
   const [entities, setEntities] = useState({});
-  const [damages, setDamages] = useState({});
-  const [pendingDamage] = useState({accumulated: [], handle: undefined});
   usePacket('EcsChange', async () => {
     setEntities({});
-  }, [setEntities]);
+  });
-  useEcsTick((payload) => {
+  const onEcsTick = useCallback((payload, ecs) => {
-    if (!ecs) {
-      return;
-    }
     const deleting = {};
     const updating = {};
     for (const id in payload) {
@@ -91,36 +85,6 @@ export default function Entities({
           };
         }
       }
-      const {damage} = update.Vulnerable || {};
-      if (damage) {
-        for (const key in damage) {
-          damage[key].onClose = () => {
-            setDamages((damages) => {
-              const {[key]: _, ...rest} = damages; // eslint-disable-line no-unused-vars
-              return rest;
-            })
-          };
-        }
-        pendingDamage.accumulated.push(damage);
-        if (!pendingDamage.handle) {
-          pendingDamage.handle = setTimeout(() => {
-            const update = {};
-            for (const damage of pendingDamage.accumulated) {
-              for (const key in damage) {
-                update[key] = damage[key];
-              }
-            }
-            pendingDamage.accumulated.length = 0;
-            setDamages((damages) => {
-              return {
-                ...damages,
-                ...update,
-              };
-            });
-            pendingDamage.handle = undefined;
-          }, 50);
-        }
-      }
     }
     setEntities((entities) => {
       for (const id in deleting) {
@@ -131,7 +95,8 @@ export default function Entities({
         ...updating,
       };
     });
-  }, [ecs, setMonopolizers]);
+  }, [setChatMessages, setMonopolizers]);
+  useEcsTick(onEcsTick);
   const renderables = [];
   for (const id in entities) {
     renderables.push(
@@ -154,7 +119,6 @@ export default function Entities({
     >
       {renderables}
       <Damages
-        damages={damages}
         scale={scale}
       />
     </div>

app/react/components/particle-worker.js

@@ -4,6 +4,17 @@ import createEcs from '@/server/create/ecs.js';
 import ClientEcs from './client-ecs.js';
 
 const ecs = createEcs(ClientEcs);
+
+[
+  'ClampPositions',
+  'Colliders',
+  'MaintainColliderHash',
+  'VisibleAabbs',
+]
+  .forEach((system) => {
+    ecs.system(system).active = false;
+  })
+
 ecs.$$caret = Math.pow(2, 31);
 
 const emitter = new Emitter(ecs);
@@ -17,20 +28,22 @@ addEventListener('message', (particle) => {
     .onEnd(() => {});
 });
 
-let last = Date.now();
+let last = performance.now();
-function tick() {
+function tick(now) {
-  const now = Date.now();
   const elapsed = (now - last) / 1000;
   last = now;
-  if (ecs.get(1)) {
+  requestAnimationFrame(tick);
+  if (!ecs.get(1)) {
+    return;
+  }
   ecs.tick(elapsed);
   emitter.tick(elapsed);
   if ('1' in ecs.diff) {
     delete ecs.diff['1'];
   }
+  if (Object.keys(ecs.diff).length > 0) {
     postMessage(ecs.diff);
-    ecs.setClean();
   }
-  requestAnimationFrame(tick);
+  ecs.setClean();
 }
 requestAnimationFrame(tick);

app/react/components/pixi/aabb.js

@@ -0,0 +1,18 @@
+import {Graphics} from '@pixi/graphics';
+
+export default class Aabb extends Graphics {
+  constructor({color, width = 0.5}) {
+    super();
+    this.$$color = color;
+    this.$$width = width;
+  }
+  redraw({x0, y0, x1, y1}) {
+    this.clear();
+    this.lineStyle(this.$$width, this.$$color);
+    this.moveTo(x0, y0);
+    this.lineTo(x1, y0);
+    this.lineTo(x1, y1);
+    this.lineTo(x0, y1);
+    this.lineTo(x0, y0);
+  }
+}

app/react/components/pixi/crosshair.js

@@ -0,0 +1,21 @@
+import {Graphics} from '@pixi/graphics';
+
+export default function crosshair() {
+  const g = new Graphics();
+  g.clear();
+  g.lineStyle(1, 0x000000);
+  g.moveTo(-5, 0);
+  g.lineTo(5, 0);
+  g.moveTo(0, -5);
+  g.lineTo(0, 5);
+  g.lineStyle(0.5, 0xffffff);
+  g.moveTo(-5, 0);
+  g.lineTo(5, 0);
+  g.moveTo(0, -5);
+  g.lineTo(0, 5);
+  g.lineStyle(1, 0x000000);
+  g.drawCircle(0, 0, 3);
+  g.lineStyle(0.5, 0xffffff);
+  g.drawCircle(0, 0, 3);
+  return g;
+}

app/react/components/pixi/ecs.jsx

@@ -1,7 +1,7 @@
 import {Container} from '@pixi/react';
-import {useState} from 'react';
+import {useCallback, useState} from 'react';
 
-import {useEcs, useEcsTick} from '@/react/context/ecs.js';
+import {useEcsTick} from '@/react/context/ecs.js';
 import {useMainEntity} from '@/react/context/main-entity.js';
 
 import Entities from './entities.jsx';
@@ -11,14 +11,13 @@ import TileLayer from './tile-layer.jsx';
 import Water from './water.jsx';
 
 export default function Ecs({camera, monopolizers, particleWorker, scale}) {
-  const [ecs] = useEcs();
   const [mainEntity] = useMainEntity();
   const [layers, setLayers] = useState([]);
   const [hour, setHour] = useState(10);
   const [projected, setProjected] = useState([]);
   const [position, setPosition] = useState({x: 0, y: 0});
   const [water, setWater] = useState();
-  useEcsTick((payload) => {
+  const onEcsTick = useCallback((payload, ecs) => {
     const entity = ecs.get(mainEntity);
     for (const id in payload) {
       const update = payload[id];
@@ -43,7 +42,8 @@ export default function Ecs({camera, monopolizers, particleWorker, scale}) {
       setPosition(Position.toJSON());
       setProjected(Wielder.activeItem()?.project(Position.tile, Direction.quantize(4)));
     }
-  }, [ecs, mainEntity, scale]);
+  }, [mainEntity]);
+  useEcsTick(onEcsTick);
   return (
     <Container
       scale={scale}
@@ -71,16 +71,16 @@ export default function Ecs({camera, monopolizers, particleWorker, scale}) {
           y={position.y}
         />
       )}
-      <Entities
-        monopolizers={monopolizers}
-        particleWorker={particleWorker}
-      />
       {projected?.length > 0 && layers[0] && (
         <TargetingGhost
           projected={projected}
           tileLayer={layers[0]}
         />
       )}
+      <Entities
+        monopolizers={monopolizers}
+        particleWorker={particleWorker}
+      />
     </Container>
   )
 }

app/react/components/pixi/emitter.jsx

@@ -1,52 +0,0 @@
-import {Container} from '@pixi/display';
-import {PixiComponent} from '@pixi/react';
-import * as particles from '@pixi/particle-emitter';
-
-const EmitterInternal = PixiComponent('Emitter', {
-  $$emitter: undefined,
-  $$raf: undefined,
-  create() {
-    return new Container();
-  },
-  applyProps(container, oldProps, newProps) {
-    if (!this.$$emitter) {
-      const {onComplete, particle} = newProps;
-      this.$$emitter = new particles.Emitter(container, particle);
-      this.$$emitter._completeCallback = onComplete;
-      let last = Date.now();
-      const render = () => {
-        this.$$raf = requestAnimationFrame(render);
-        const now = Date.now();
-        this.$$emitter.update((now - last) / 1000);
-        last = now;
-      };
-      this.$$emitter.emit = true;
-      render();
-    }
-  },
-  willUnmount() {
-    if (this.$$emitter) {
-      this.$$emitter.emit = false;
-      cancelAnimationFrame(this.$$raf);
-    }
-  }
-});
-
-export default function Emitter({entity}) {
-  const {Emitter} = entity;
-  const emitters = [];
-  for (const id in Emitter.emitting) {
-    const particle = Emitter.emitting[id];
-    emitters.push(
-      <EmitterInternal
-        key={id}
-        onComplete={() => {
-          delete Emitter.emitting[id];
-        }}
-        particle={particle}
-      />
-    );
-  }
-  return <>{emitters}</>;
-}
-

app/react/components/pixi/entities.jsx

@@ -1,119 +1,126 @@
 import {AdjustmentFilter} from '@pixi/filter-adjustment';
 import {GlowFilter} from '@pixi/filter-glow';
 import {Container} from '@pixi/react';
-import {useEffect, useState} from 'react';
+import {useCallback, useEffect, useRef, useState} from 'react';
 
 import {usePacket} from '@/react/context/client.js';
+import {useDebug} from '@/react/context/debug.js';
 import {useEcs, useEcsTick} from '@/react/context/ecs.js';
 import {useMainEntity} from '@/react/context/main-entity.js';
 import {useRadians} from '@/react/context/radians.js';
 
-import Entity from './entity.jsx';
+import Entity from './entity.js';
 
 export default function Entities({monopolizers, particleWorker}) {
+  const [debug] = useDebug();
   const [ecs] = useEcs();
-  const [entities, setEntities] = useState({});
+  const containerRef = useRef();
+  const latestTick = useRef();
+  const entities = useRef({});
+  const pool = useRef([]);
   const [mainEntity] = useMainEntity();
   const radians = useRadians();
-  const [willInteractWith, setWillInteractWith] = useState(0);
+  const willInteractWith = useRef(0);
   const [interactionFilters] = useState([
     new AdjustmentFilter(),
     new GlowFilter({color: 0x0}),
   ]);
+  const pulse = (Math.cos(radians / 4) + 1) * 0.5;
+  interactionFilters[0].brightness = (pulse * 0.75) + 1;
+  interactionFilters[1].outerStrength = pulse * 0.5;
+  const updateEntities = useCallback((payload) => {
+    for (const id in payload) {
+      if ('1' === id) {
+        continue;
+      }
+      if (!payload[id]) {
+        entities.current[id].removeFromContainer();
+        pool.current.push(entities.current[id]);
+        delete entities.current[id];
+        continue;
+      }
+      if (!entities.current[id]) {
+        entities.current[id] = pool.current.length > 0
+          ? pool.current.pop()
+          : new Entity();
+        entities.current[id].reset(ecs.get(id), debug);
+        if (mainEntity === id) {
+          entities.current[id].setMainEntity();
+        }
+      }
+      entities.current[id].update(payload[id], containerRef.current);
+    }
+  }, [debug, ecs, mainEntity])
+  useEffect(() => {
+    if (0 === pool.current.length) {
+      for (let i = 0; i < 1000; ++i) {
+        pool.current.push(new Entity());
+      }
+    }
+  }, []);
+  useEffect(() => {
+    for (const key in entities.current) {
+      entities.current[key].setDebug(debug);
+    }
+  }, [debug]);
+  usePacket('EcsChange', async () => {
+    for (const id in entities.current) {
+      entities.current[id].removeFromContainer();
+    }
+    entities.current = {};
+  });
+  const onEcsTickEntities = useCallback((payload) => {
+    updateEntities(payload);
+  }, [updateEntities]);
+  useEcsTick(onEcsTickEntities);
   useEffect(() => {
     if (!ecs || !particleWorker) {
       return;
     }
     async function onMessage(diff) {
+      latestTick.current = Promise.resolve(latestTick.current).then(async () => {
         await ecs.apply(diff.data);
-      const deleted = {};
+        updateEntities(diff.data);
-      const updated = {};
-      for (const id in diff.data) {
-        if (!diff.data[id]) {
-          deleted[id] = true;
-        }
-        else {
-          updated[id] = ecs.get(id);
-        }
-      }
-      setEntities((entities) => {
-        for (const id in deleted) {
-          delete entities[id];
-        }
-        return {
-          ...entities,
-          ...updated,
-        };
       });
     }
     particleWorker.addEventListener('message', onMessage);
     return () => {
       particleWorker.removeEventListener('message', onMessage);
     };
-  }, [ecs, particleWorker]);
+  }, [ecs, particleWorker, updateEntities]);
-  const pulse = (Math.cos(radians / 4) + 1) * 0.5;
+  const onEcsTickParticles = useCallback((payload) => {
-  interactionFilters[0].brightness = (pulse * 0.75) + 1;
-  interactionFilters[1].outerStrength = pulse * 0.5;
-  usePacket('EcsChange', async () => {
-    setEntities({});
-  }, [setEntities]);
-  useEcsTick((payload) => {
-    if (!ecs) {
-      return;
-    }
-    const deleting = {};
-    const updating = {};
     for (const id in payload) {
-      if ('1' === id) {
-        continue;
-      }
       const update = payload[id];
-      if (false === update) {
-        deleting[id] = true;
-        continue;
-      }
-      updating[id] = ecs.get(id);
       if (update.Emitter?.emit) {
         for (const id in update.Emitter.emit) {
           particleWorker?.postMessage(update.Emitter.emit[id]);
         }
       }
     }
-    setEntities((entities) => {
+  }, [particleWorker]);
-      for (const id in deleting) {
+  useEcsTick(onEcsTickParticles);
-        delete entities[id];
+  const onEcsTickInteractions = useCallback((payload, ecs) => {
-      }
-      return {
-        ...entities,
-        ...updating,
-      };
-    });
-  }, [ecs, particleWorker]);
-  useEcsTick(() => {
-    if (!ecs) {
-      return;
-    }
     const main = ecs.get(mainEntity);
     if (main) {
-      setWillInteractWith(main.Interacts.willInteractWith);
+      if (willInteractWith.current !== main.Interacts.willInteractWith) {
+        if (entities.current[willInteractWith.current]) {
+          entities.current[willInteractWith.current].diffuse.filters = [];
         }
-  }, [ecs, mainEntity]);
+        willInteractWith.current = main.Interacts.willInteractWith;
-  const renderables = [];
-  for (const id in entities) {
-    const isHighlightedInteraction = 0 === monopolizers.length && id == willInteractWith;
-    renderables.push(
-      <Entity
-        filters={isHighlightedInteraction ? interactionFilters : null}
-        entity={entities[id]}
-        key={id}
-      />
-    );
       }
+      const interacting = entities.current[main.Interacts.willInteractWith];
+      if (interacting) {
+        interacting.diffuse.filters = 0 === monopolizers.length
+          ? interactionFilters
+          : [];
+      }
+    }
+  }, [interactionFilters, mainEntity, monopolizers]);
+  useEcsTick(onEcsTickInteractions);
   return (
     <Container
+      ref={containerRef}
       sortableChildren
-    >
+    />
-      {renderables}
-    </Container>
   );
 }

app/react/components/pixi/entity.js

@@ -0,0 +1,197 @@
+import {Assets} from '@pixi/assets';
+import {Container as PixiContainer} from '@pixi/display';
+import {Sprite} from '@pixi/sprite';
+
+import Aabb from './aabb.js';
+import createCrosshair from './crosshair.js';
+import {deferredLighting, PointLight} from './lights.js';
+
+export default class Entity {
+  static assets = {};
+  attached = false;
+  colliderAabb = new Aabb({color: 0xffffff});
+  container = new PixiContainer();
+  crosshair = createCrosshair();
+  debug = new PixiContainer();
+  diffuse = new Sprite();
+  isMainEntity = false;
+  normals = new Sprite();
+  point;
+  sprite = new PixiContainer();
+  visibleAabb = new Aabb({color: 0xff00ff});
+  constructor() {
+    this.diffuse.parentGroup = deferredLighting.diffuseGroup;
+    this.normals.parentGroup = deferredLighting.normalGroup;
+    this.container.addChild(this.diffuse);
+    this.container.addChild(this.normals);
+    this.container.addChild(this.crosshair);
+    this.debug.addChild(this.colliderAabb);
+    this.debug.addChild(this.visibleAabb);
+  }
+  static async loadAsset(source = '') {
+    if (!this.assets['']) {
+      const {Texture} = await import('@pixi/core');
+      this.assets[''] = {data: {meta: {}}, textures: {'': Texture.WHITE}};
+    }
+    if (!this.assets[source]) {
+      this.assets[source] = Assets.load(source);
+    }
+    return this.assets[source];
+  }
+  removeFromContainer() {
+    this.container.parent.removeChild(this.container);
+    this.debug.parent.removeChild(this.debug);
+    this.attached = false;
+  }
+  reset(entity, debug) {
+    this.entity = entity;
+    if (this.light) {
+      this.container.removeChild(this.light);
+      this.light = undefined;
+    }
+    this.setDebug(debug);
+    this.isMainEntity = false;
+    if (this.interactionAabb) {
+      this.debug.removeChild(this.interactionAabb);
+    }
+    this.interactionAabb = undefined;
+  }
+  setDebug(isDebugging) {
+    if (isDebugging) {
+      this.crosshair.alpha = 1;
+      this.debug.alpha = 1;
+    }
+    else {
+      this.crosshair.alpha = 0;
+      this.debug.alpha = 0;
+    }
+  }
+  setMainEntity() {
+    if (this.isMainEntity) {
+      return;
+    }
+    this.isMainEntity = true;
+    this.interactionAabb = new Aabb({color: 0x00ff00});
+    this.debug.addChild(this.interactionAabb);
+  }
+  static textureFromAsset(asset, animation, frame) {
+    if (!asset) {
+      return undefined;
+    }
+    let texture;
+    if (asset.data.animations) {
+      if (!animation) {
+        return undefined;
+      }
+      texture = asset.animations[animation][frame];
+    }
+    else {
+      texture = asset.textures[''];
+    }
+    return texture;
+  }
+  update({Direction, Light, Position, Sprite, VisibleAabb}, container) {
+    if (Light) {
+      if (!this.light) {
+        this.light = new PointLight(
+          0xffffff - 0x2244cc,
+          0,
+        );
+      }
+      this.light.brightness = Light.brightness;
+    }
+    if (Position) {
+      const {x, y} = this.entity.Position;
+      this.container.x = x;
+      this.container.y = y;
+      this.container.zIndex = y;
+    }
+    if (Sprite) {
+      const {diffuse,  normals} = this;
+      if (!this.attached || 'alpha' in Sprite) {
+        diffuse.alpha = normals.alpha = this.entity.Sprite.alpha;
+      }
+      if (!this.attached || 'anchorX' in Sprite) {
+        diffuse.anchor.x = normals.anchor.x = this.entity.Sprite.anchorX;
+      }
+      if (!this.attached || 'anchorY' in Sprite) {
+        diffuse.anchor.y = normals.anchor.y = this.entity.Sprite.anchorY;
+      }
+      if (!this.attached || 'scaleX' in Sprite) {
+        diffuse.scale.x = normals.scale.x = this.entity.Sprite.scaleX;
+      }
+      if (!this.attached || 'scaleY' in Sprite) {
+        diffuse.scale.y = normals.scale.y = this.entity.Sprite.scaleY;
+      }
+      if (!this.attached || 'tint' in Sprite) {
+        diffuse.tint = normals.tint = this.entity.Sprite.tint;
+      }
+      if  (
+        !this.attached
+        || ('source' in Sprite)
+        || ('animation' in Sprite)
+        || ('frame' in Sprite)
+      ) {
+        this.constructor.loadAsset(this.entity.Sprite.source).then(async (asset) => {
+          if (!this.entity?.Sprite) {
+            return;
+          }
+          const texture = await this.constructor.textureFromAsset(
+            asset,
+            this.entity.Sprite.animation,
+            this.entity.Sprite.frame,
+          );
+          diffuse.texture = texture;
+          if (asset.data.meta.normals) {
+            const {pathname} = new URL(
+              Sprite.source
+                .split('/')
+                .slice(0, -1)
+                .concat(asset.data.meta.normals)
+                .join('/'),
+              'http://example.org',
+            );
+            this.constructor.loadAsset(pathname).then(async (asset) => {
+              const texture = await this.constructor.textureFromAsset(
+                asset,
+                this.entity.Sprite.animation,
+                this.entity.Sprite.frame,
+              );
+              normals.texture = texture;
+            });
+          }
+        });
+      }
+    }
+    if (!this.attached) {
+      const {diffuse, normals} = this;
+      diffuse.rotation = 0;
+      normals.rotation = 0;
+    }
+    if (Direction) {
+      const {diffuse, normals} = this;
+      if (!this.attached || 'direction' in Direction) {
+        if (this.entity.Sprite.rotates) {
+          const rotation = this.entity.Direction.direction + this.entity.Sprite.rotation;
+          diffuse.rotation = rotation;
+          normals.rotation = rotation;
+        }
+      }
+    }
+    if (this.entity.Collider) {
+      this.colliderAabb.redraw(this.entity.Collider.aabb);
+    }
+    if (VisibleAabb) {
+      this.visibleAabb.redraw(this.entity.VisibleAabb);
+    }
+    if (this.isMainEntity) {
+      this.interactionAabb.redraw(this.entity.Interacts.aabb());
+    }
+    if (this.attached || !container) {
+      return;
+    }
+    container.addChild(this.container);
+    container.addChild(this.debug);
+    this.attached = true;
+  }
+}

app/react/components/pixi/entity.jsx

@@ -1,120 +0,0 @@
-import {Container, Graphics} from '@pixi/react';
-import {memo, useCallback} from 'react';
-
-import {useDebug} from '@/react/context/debug.js';
-import {useMainEntity} from '@/react/context/main-entity.js';
-
-import Light from './light.jsx';
-import SpriteComponent from './sprite.jsx';
-
-function Aabb({color, width = 0.5, x0, y0, x1, y1, ...rest}) {
-  const draw = useCallback((g) => {
-    g.clear();
-    g.lineStyle(width, color);
-    g.moveTo(x0, y0);
-    g.lineTo(x1, y0);
-    g.lineTo(x1, y1);
-    g.lineTo(x0, y1);
-    g.lineTo(x0, y0);
-  }, [color, width, x0, x1, y0, y1]);
-  return (
-    <Graphics draw={draw} x={0} y={0} {...rest} />
-  );
-}
-
-function Crosshair() {
-  const draw = useCallback((g) => {
-    g.clear();
-    g.lineStyle(1, 0x000000);
-    g.moveTo(-5, 0);
-    g.lineTo(5, 0);
-    g.moveTo(0, -5);
-    g.lineTo(0, 5);
-    g.lineStyle(0.5, 0xffffff);
-    g.moveTo(-5, 0);
-    g.lineTo(5, 0);
-    g.moveTo(0, -5);
-    g.lineTo(0, 5);
-    g.lineStyle(1, 0x000000);
-    g.drawCircle(0, 0, 3);
-    g.lineStyle(0.5, 0xffffff);
-    g.drawCircle(0, 0, 3);
-  }, []);
-  return (
-    <Graphics draw={draw} />
-  );
-}
-
-function Entity({entity, ...rest}) {
-  const [debug] = useDebug();
-  const [mainEntity] = useMainEntity();
-  if (!entity) {
-    return false;
-  }
-  const {Direction, id, Sprite} = entity;
-  return (
-    <>
-      <Container
-        x={entity.Position.x}
-        y={entity.Position.y}
-        zIndex={entity.Position?.y || 0}
-      >
-        {entity.Sprite && (
-          <SpriteComponent
-            alpha={Sprite.alpha}
-            anchor={Sprite.anchor}
-            animation={Sprite.animation}
-            direction={Direction?.direction}
-            frame={Sprite.frame}
-            id={id}
-            scale={Sprite.scale}
-            rotates={Sprite.rotates}
-            rotation={Sprite.rotation}
-            source={Sprite.source}
-            tint={Sprite.tint}
-            {...rest}
-          />
-        )}
-        {entity.Light && (
-          <Light
-            brightness={entity.Light.brightness}
-          />
-        )}
-        {debug && entity.Position && (
-          <Crosshair />
-        )}
-      </Container>
-      {debug && (
-        <Aabb
-          color={0xff00ff}
-          {...entity.VisibleAabb}
-        />
-      )}
-      {debug && entity.Collider && (
-        <>
-          <Aabb
-            color={0xffffff}
-            width={0.5}
-            {...entity.Collider.aabb}
-          />
-          {entity.Collider.aabbs.map((aabb, i) => (
-            <Aabb
-              color={0xffff00}
-              width={0.25}
-              key={i}
-              {...aabb}
-            />
-          ))}
-        </>
-      )}
-      {debug && mainEntity == entity.id && (
-        <Aabb
-          color={0x00ff00}
-          {...entity.Interacts.aabb()}
-        />
-      )}
-    </>
-  );
-}
-
-export default memo(Entity);

app/react/components/pixi/light.jsx

@@ -1,34 +0,0 @@
-import {PixiComponent} from '@pixi/react';
-
-import {PointLight} from './lights.js';
-
-const LightInternal = PixiComponent('Light', {
-  create({brightness}) {
-    const light = new PointLight(
-      0xffffff - 0x2244cc,
-      brightness,
-    );
-    // light.shader.program.fragmentSrc = light.shader.program.fragmentSrc.replace(
-    //   'float D = length(lightVector)',
-    //   'float D = length(lightVector) / 1.0',
-    // );
-    // light.shader.program.fragmentSrc = light.shader.program.fragmentSrc.replace(
-    //   'intensity = diffuse * attenuation',
-    //   'intensity = diffuse * (attenuation * 2.0)',
-    // );
-    // light.falloff = [0.5, 5, 50];
-    // light.falloff = light.falloff.map((n, i) => n / (2 + i));
-    // light.parentGroup = deferredLighting.lightGroup;
-    // delete light.parentGroup;
-    return light;
-  },
-});
-
-export default function Light({brightness}) {
-  return (
-    <LightInternal
-      brightness={brightness}
-    />
-  )
-}
-

app/react/components/pixi/sprite.jsx

@@ -1,102 +0,0 @@
-import {Sprite as PixiSprite} from '@pixi/react';
-import {memo, useEffect, useState} from 'react';
-
-import {useAsset} from '@/react/context/assets.js';
-
-import {deferredLighting} from './lights.js';
-
-function textureFromAsset(asset, animation, frame) {
-  if (!asset) {
-    return undefined;
-  }
-  let texture;
-  if (asset.data.animations) {
-    if (!animation) {
-      return undefined;
-    }
-    texture = asset.animations[animation][frame];
-  }
-  else {
-    texture = asset.textures[''];
-  }
-  return texture;
-}
-
-function Sprite(props) {
-  const {
-    alpha,
-    anchor,
-    animation,
-    direction,
-    frame,
-    scale,
-    rotates,
-    rotation,
-    source,
-    tint,
-    ...rest
-  } = props;
-  const [mounted, setMounted] = useState();
-  const [normals, setNormals] = useState();
-  const [normalsMounted, setNormalsMounted] = useState();
-  const asset = useAsset(source);
-  const normalsAsset = useAsset(normals);
-  useEffect(() => {
-    if (!asset) {
-      return;
-    }
-    const {normals} = asset.data.meta;
-    if (normals) {
-      const {pathname} = new URL(
-        source.split('/').slice(0, -1).concat(normals).join('/'),
-        'http://example.org',
-      );
-      setNormals(pathname);
-    }
-  }, [asset, source]);
-  const texture = textureFromAsset(
-    asset,
-    animation,
-    frame,
-  );
-  const normalsTexture = textureFromAsset(
-    normalsAsset,
-    animation,
-    frame,
-  );
-  if (mounted) {
-    mounted.parentGroup = deferredLighting.diffuseGroup;
-  }
-  if (normalsMounted) {
-    normalsMounted.parentGroup = deferredLighting.normalGroup;
-  }
-  return (
-    <>
-      {texture && (
-        <PixiSprite
-          alpha={alpha}
-          anchor={anchor}
-          ref={setMounted}
-          {...(rotates ? {rotation: direction + rotation} : {})}
-          scale={scale}
-          texture={texture}
-          {...(0 !== tint ? {tint} : {})}
-          {...rest}
-        />
-      )}
-      {normalsTexture && (
-        <PixiSprite
-          alpha={alpha}
-          anchor={anchor}
-          ref={setNormalsMounted}
-          {...(rotates ? {rotation: direction + rotation} : {})}
-          scale={scale}
-          texture={normalsTexture}
-          {...rest}
-        />
-      )}
-    </>
-  );
-}
-
-export default memo(Sprite);

app/react/components/pixi/targeting-ghost.jsx

@@ -4,19 +4,19 @@ import {PixiComponent} from '@pixi/react';
 
 import {useRadians} from '@/react/context/radians.js';
 
+import {deferredLighting} from './lights.js';
+
 const tileSize = {x: 16, y: 16};
 
 const TargetingGhostInternal = PixiComponent('TargetingGhost', {
   create: () => {
     // Solid target square.
     const target = new Graphics();
-    target.alpha = 0.7;
     target.lineStyle(1, 0xffffff);
     target.drawRect(0.5, 0.5, tileSize.x, tileSize.y);
     target.pivot = {x: tileSize.x / 2, y: tileSize.y / 2};
     // Inner spinny part.
     const targetInner = new Graphics();
-    targetInner.alpha = 0.3;
     targetInner.lineStyle(3, 0x333333);
     targetInner.beginFill(0xdddddd);
     targetInner.pivot = {x: tileSize.x / 2, y: tileSize.y / 2};
@@ -25,7 +25,9 @@ const TargetingGhostInternal = PixiComponent('TargetingGhost', {
     targetInner.position.y = 0.5;
     // ...
     const container = new Container();
+    container.alpha = 0.4;
     container.addChild(target, targetInner);
+    container.parentGroup = deferredLighting.diffuseGroup;
     return container;
   },
   applyProps: (container, oldProps, {x, y, radians}) => {

app/react/components/ui.jsx

@@ -35,6 +35,7 @@ function Ui({disconnected}) {
   // Key input.
   const client = useClient();
   const chatInputRef = useRef();
+  const latestTick = useRef();
   const gameRef = useRef();
   const [mainEntity, setMainEntity] = useMainEntity();
   const [debug, setDebug] = useDebug();
@@ -310,35 +311,23 @@ function Ui({disconnected}) {
     setDebug,
     setScale,
   ]);
-  usePacket('EcsChange', async () => {
+  const onEcsChangePacket = useCallback(() => {
     refreshEcs();
     setMainEntity(undefined);
     setMonopolizers([]);
-  }, [refreshEcs, setMainEntity, setMonopolizers]);
+  }, [refreshEcs, setMainEntity]);
-  usePacket('Tick', async (payload, client) => {
+  usePacket('EcsChange', onEcsChangePacket);
+  const onTickPacket = useCallback(async (payload, client) => {
     if (0 === Object.keys(payload.ecs).length) {
       return;
     }
+    latestTick.current = Promise.resolve(latestTick.current).then(async () => {
       await ecs.apply(payload.ecs);
       client.emitter.invoke(':Ecs', payload.ecs);
-  }, [ecs]);
-  useEcsTick((payload) => {
-    if (!('1' in payload) || particleWorker) {
-      return
-    }
-    const localParticleWorker = new Worker(
-      new URL('./particle-worker.js', import.meta.url),
-      {type: 'module'},
-    );
-    localParticleWorker.postMessage(ecs.get(1).toJSON());
-    setParticleWorker((particleWorker) => {
-      if (particleWorker) {
-        particleWorker.terminate();
-      }
-      return localParticleWorker;
     });
-  }, [particleWorker]);
+  }, [ecs]);
-  useEcsTick((payload) => {
+  usePacket('Tick', onTickPacket);
+  const onEcsTick = useCallback((payload, ecs) => {
     let localMainEntity = mainEntity;
     for (const id in payload) {
       const entity = ecs.get(id);
@@ -346,14 +335,6 @@ function Ui({disconnected}) {
       if (!update) {
         continue;
       }
-      if (update.Direction && entity.Collider) {
-        entity.Collider.updateAabbs();
-      }
-      if (update.Sound?.play) {
-        for (const sound of update.Sound.play) {
-          (new Audio(sound)).play();
-        }
-      }
       if (update.MainEntity) {
         setMainEntity(localMainEntity = id);
       }
@@ -390,15 +371,60 @@ function Ui({disconnected}) {
         }
       }
     }
-    if (localMainEntity) {
+  }, [hotbarHideHandle, mainEntity, setMainEntity]);
-      const mainEntityEntity = ecs.get(localMainEntity);
+  useEcsTick(onEcsTick);
+  const onEcsTickParticles = useCallback((payload, ecs) => {
+    if (!('1' in payload) || particleWorker) {
+      return
+    }
+    const localParticleWorker = new Worker(
+      new URL('./particle-worker.js', import.meta.url),
+      {type: 'module'},
+    );
+    localParticleWorker.postMessage(ecs.get(1).toJSON());
+    setParticleWorker((particleWorker) => {
+      if (particleWorker) {
+        particleWorker.terminate();
+      }
+      return localParticleWorker;
+    });
+  }, [particleWorker]);
+  useEcsTick(onEcsTickParticles);
+  const onEcsTickSound = useCallback((payload) => {
+    for (const id in payload) {
+      const update = payload[id];
+      if (update.Sound?.play) {
+        for (const sound of update.Sound.play) {
+          (new Audio(sound)).play();
+        }
+      }
+    }
+  }, []);
+  useEcsTick(onEcsTickSound);
+  const onEcsTickAabbs = useCallback((payload, ecs) => {
+    for (const id in payload) {
+      const entity = ecs.get(id);
+      const update = payload[id];
+      if (!update) {
+        continue;
+      }
+      if (update.Direction && entity.Collider) {
+        entity.Collider.updateAabbs();
+      }
+    }
+  }, []);
+  useEcsTick(onEcsTickAabbs);
+  const onEcsTickCamera = useCallback((payload, ecs) => {
+    if (mainEntity) {
+      const mainEntityEntity = ecs.get(mainEntity);
       const x = Math.round((mainEntityEntity.Camera.x * scale) - RESOLUTION.x / 2);
       const y = Math.round((mainEntityEntity.Camera.y * scale) - RESOLUTION.y / 2);
       if (x !== camera.x || y !== camera.y) {
         setCamera({x, y});
       }
     }
-  }, [camera, ecs, hotbarHideHandle, mainEntity, scale]);
+  }, [camera, mainEntity, scale]);
+  useEcsTick(onEcsTickCamera);
   useEffect(() => {
     function onContextMenu(event) {
       event.preventDefault();

app/react/context/client.js

@@ -8,7 +8,7 @@ export function useClient() {
   return useContext(context);
 }
 
-export function usePacket(type, fn, dependencies) {
+export function usePacket(type, fn) {
   const client = useClient();
   useEffect(() => {
     if (!client) {
@@ -21,6 +21,5 @@ export function usePacket(type, fn, dependencies) {
     return () => {
       client.removePacketListener(type, listener);
     };
-  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [client, fn]);
-  }, [client, ...dependencies]);
 }

app/react/context/ecs.js

@@ -1,4 +1,4 @@
-import {createContext, useContext} from 'react';
+import {createContext, useCallback, useContext} from 'react';
 
 import {usePacket} from './client.js';
 
@@ -10,7 +10,13 @@ export function useEcs() {
   return useContext(context);
 }
 
-export function useEcsTick(fn, dependencies) {
+export function useEcsTick(fn) {
   const [ecs] = useEcs();
-  usePacket(':Ecs', fn, [ecs, ...dependencies]);
+  const memo = useCallback((payload) => {
+    if (!ecs) {
+      return;
+    }
+    fn(payload, ecs);
+  }, [ecs, fn]);
+  usePacket(':Ecs', memo);
 }

app/routes/_main-menu.play.$.$/route.jsx

@@ -1,5 +1,5 @@
 import {json} from "@remix-run/node";
-import {useEffect, useState} from 'react';
+import {useCallback, useEffect, useState} from 'react';
 import {useOutletContext, useParams} from 'react-router-dom';
 
 import Ui from '@/react/components/ui.jsx';
@@ -9,6 +9,7 @@ import DebugContext from '@/react/context/debug.js';
 import EcsContext from '@/react/context/ecs.js';
 import MainEntityContext from '@/react/context/main-entity.js';
 import RadiansContext from '@/react/context/radians.js';
+import useAnimationFrame from '@/react/hooks/use-animation-frame.js';
 import {juggleSession} from '@/server/session.server.js';
 import {TAU} from '@/util/math.js';
 
@@ -29,23 +30,10 @@ export default function PlaySpecific() {
   const params = useParams();
   const [type, url] = params['*'].split('/');
   const [radians, setRadians] = useState(0);
-  useEffect(() => {
+  const spin = useCallback((elapsed) => {
-    let handle;
-    let last;
-    const spin = (ts) => {
-      if ('undefined' === typeof last) {
-        last = ts;
-      }
-      const elapsed = (ts - last) / 1000;
-      last = ts;
     setRadians((radians) => radians + (elapsed * TAU));
-      handle = requestAnimationFrame(spin);
-    };
-    handle = requestAnimationFrame(spin);
-    return () => {
-      cancelAnimationFrame(handle);
-    };
   }, []);
+  useAnimationFrame(spin);
   useEffect(() => {
     if (!Client) {
       return;

app/server/create/homestead.js

@@ -1,5 +1,27 @@
 import data from '../../../public/assets/dev/homestead.json';
 
+function animal() {
+  return {
+    Alive: {health: 100},
+    Behaving: {},
+    Collider: {},
+    Controlled: {},
+    Direction: {},
+    Emitter: {},
+    Forces: {},
+    Interlocutor: {},
+    Position: {},
+    Speed: {speed: 20},
+    Sprite: {
+      animation: 'moving:down',
+    },
+    Tags: {},
+    Ticking: {},
+    VisibleAabb: {},
+    Vulnerable: {},
+  };
+}
+
 export default async function createHomestead(id) {
   const area = {x: 100, y: 60};
   const entities = [];
@@ -138,8 +160,10 @@ export default async function createHomestead(id) {
     Ticking: {},
     VisibleAabb: {},
   });
-  const kitty = {
+  const animalJson = animal();
-    Alive: {health: 100},
+  for (let i = 0; i < 50; ++i) {
+    entities.push({
+      ...animalJson,
       Behaving: {
         routines: {
           initial: '/assets/kitty/initial.js',
@@ -157,10 +181,6 @@ export default async function createHomestead(id) {
           },
         ],
       },
-    Controlled: {},
-    Direction: {},
-    Emitter: {},
-    Forces: {},
       Interactive: {
         interacting: 1,
         interactScript: `
@@ -181,22 +201,122 @@ export default async function createHomestead(id) {
           })
         `,
       },
-    Interlocutor: {},
+      Position: {
-    Position: {x: 250, y: 250},
+        x: 250 + (Math.random() - 0.5) * 300,
-    Speed: {speed: 20},
+        y: 250 + (Math.random() - 0.5) * 300,
+      },
       Sprite: {
+        ...animalJson.Sprite,
         anchorX: 0.5,
         anchorY: 0.7,
         source: '/assets/kitty/kitty.json',
         speed: 0.115,
       },
       Tags: {tags: ['kittan']},
-    Ticking: {},
+    });
-    VisibleAabb: {},
+  }
-    Vulnerable: {},
-  };
   for (let i = 0; i < 50; ++i) {
-    entities.push(kitty);
+    entities.push({
+      ...animalJson,
+      Behaving: {
+        routines: {
+          initial: '/assets/farm/animals/cow-adult/initial.js',
+        },
+      },
+      Collider: {
+        bodies: [
+          {
+            points: [
+              {x: -3.5, y: -3.5},
+              {x: 3.5, y: -3.5},
+              {x: 3.5, y: 3.5},
+              {x: -3.5, y: 3.5},
+            ],
+          },
+        ],
+      },
+      Interactive: {
+        interacting: 1,
+        interactScript: `
+          const lines = [
+            'sno<shake>rr</shake>t',
+            'm<wave>ooooooooooo</wave>',
+          ];
+          const line = lines[Math.floor(Math.random() * lines.length)];
+          subject.Interlocutor.dialogue({
+            body: line,
+            linger: 2,
+            offset: {x: 0, y: -16},
+            origin: 'track',
+            position: 'track',
+          })
+        `,
+      },
+      Position: {
+        x: 350 + (Math.random() - 0.5) * 300,
+        y: 350 + (Math.random() - 0.5) * 300,
+      },
+      Sprite: {
+        ...animalJson.Sprite,
+        anchorX: 0.5,
+        anchorY: 0.8,
+        source: '/assets/farm/animals/cow-adult/cow-adult.json',
+        speed: 0.25,
+      },
+    });
+  }
+  for (let i = 0; i < 50; ++i) {
+    entities.push({
+      ...animalJson,
+      Behaving: {
+        routines: {
+          initial: '/assets/farm/animals/goat-white/initial.js',
+        },
+      },
+      Collider: {
+        bodies: [
+          {
+            points: [
+              {x: -7, y: -3.5},
+              {x: 7, y: -3.5},
+              {x: 7, y: 3.5},
+              {x: -7, y: 3.5},
+            ],
+          },
+        ],
+      },
+      Interactive: {
+        interacting: 1,
+        interactScript: `
+          const lines = [
+            'mrowwr',
+            'p<shake>rrr</shake>o<wave>wwwww</wave>',
+            'mew<rate frequency={0.5}> </rate>mew!',
+            'me<wave>wwwww</wave>',
+            '\\\\*pu<shake>rrrrr</shake>\\\\*',
+          ];
+          const line = lines[Math.floor(Math.random() * lines.length)];
+          subject.Interlocutor.dialogue({
+            body: line,
+            linger: 2,
+            offset: {x: 0, y: -16},
+            origin: 'track',
+            position: 'track',
+          })
+        `,
+      },
+      Position: {
+        x: 350 + (Math.random() - 0.5) * 300,
+        y: 150 + (Math.random() - 0.5) * 300,
+      },
+      Sprite: {
+        ...animalJson.Sprite,
+        anchorX: 0.5,
+        anchorY: 0.8,
+        source: '/assets/farm/animals/goat-white/goat-white.json',
+        speed: 0.25,
+      },
+    });
   }
   entities.push({
     Collider: {

app/server/create/player.js

@@ -37,7 +37,7 @@ export default async function createPlayer(id) {
     Magnet: {strength: 24},
     Player: {},
     Position: {x: 128, y: 448},
-    Speed: {speed: 100},
+    Speed: {speed: 300},
     Sound: {},
     Sprite: {
       anchorX: 0.5,
@@ -55,4 +55,3 @@ export default async function createPlayer(id) {
   };
   return player;
 }
-

app/util/color.js

@@ -0,0 +1,61 @@
+const {min, max, round} = Math;
+
+export function hslToHex(h, s, l) {
+  const [r, g, b] = hslToRgb(h, s, l);
+  return (r << 16) | (g << 8) | b;
+}
+
+export function hslToRgb(h, s, l) {
+  let r, g, b;
+  if (s === 0) {
+    r = g = b = l;
+  }
+  else {
+    const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+    const p = 2 * l - q;
+    r = hueToRgb(p, q, h + 1/3);
+    g = hueToRgb(p, q, h);
+    b = hueToRgb(p, q, h - 1/3);
+  }
+  return [round(r * 255), round(g * 255), round(b * 255)];
+}
+
+function hueToRgb(p, q, t) {
+  if (t < 0) t += 1;
+  if (t > 1) t -= 1;
+  if (t < 1/6) return p + (q - p) * 6 * t;
+  if (t < 1/2) return q;
+  if (t < 2/3) return p + (q - p) * (2/3 - t) * 6;
+  return p;
+}
+
+export function hexToHsl(i) {
+  const [r, g, b] = hexToRgb(i);
+  return rgbToHsl(r, g, b);
+}
+
+export function hexToRgb(i) {
+  const o = i > 16777215 ? 8 : 0;
+  return [
+    (i >> o + 16) & 255,
+    (i >> o + 8 ) & 255,
+    (i >> o + 0 ) & 255,
+  ];
+}
+
+
+export function rgbToHsl(r, g, b) {
+  (r /= 255), (g /= 255), (b /= 255);
+  const vmax = max(r, g, b), vmin = min(r, g, b);
+  let h, s, l = (vmax + vmin) / 2;
+  if (vmax === vmin) {
+    return [0, 0, l];
+  }
+  const d = vmax - vmin;
+  s = l > 0.5 ? d / (2 - vmax - vmin) : d / (vmax + vmin);
+  if (vmax === r) h = (g - b) / d + (g < b ? 6 : 0);
+  if (vmax === g) h = (b - r) / d + 2;
+  if (vmax === b) h = (r - g) / d + 4;
+  h /= 6;
+  return [h, s, l];
+}

app/util/script.js

@@ -2,6 +2,7 @@ import {parse as acornParse} from 'acorn';
 import {LRUCache} from 'lru-cache';
 
 import Sandbox from '@/astride/sandbox.js';
+import * as color from '@/util/color.js';
 import delta from '@/util/delta.js';
 import lfo from '@/util/lfo.js';
 import * as MathUtil from '@/util/math.js';
@@ -40,6 +41,7 @@ export default class Script {
 
   static contextDefaults() {
     return {
+      color,
       console,
       delta,
       lfo,
@@ -117,7 +119,7 @@ export default class Script {
         }
         return;
       }
-      if (async) {
+      if (async || value instanceof Promise) {
         this.promise = value;
         value
           .catch(reject ? reject : () => {})

public/assets/farm/animals/cow-adult/cow-adult.json

@@ -0,0 +1,263 @@
+{
+  "animations": {
+    "idle:up": [
+      "farm/animals/cow-adult/cow-adult/10"
+    ],
+    "idle:right": [
+      "farm/animals/cow-adult/cow-adult/7"
+    ],
+    "idle:down": [
+      "farm/animals/cow-adult/cow-adult/1"
+    ],
+    "idle:left": [
+      "farm/animals/cow-adult/cow-adult/4"
+    ],
+    "moving:down": [
+      "farm/animals/cow-adult/cow-adult/0",
+      "farm/animals/cow-adult/cow-adult/1",
+      "farm/animals/cow-adult/cow-adult/2"
+    ],
+    "moving:left": [
+      "farm/animals/cow-adult/cow-adult/3",
+      "farm/animals/cow-adult/cow-adult/4",
+      "farm/animals/cow-adult/cow-adult/5"
+    ],
+    "moving:right": [
+      "farm/animals/cow-adult/cow-adult/6",
+      "farm/animals/cow-adult/cow-adult/7",
+      "farm/animals/cow-adult/cow-adult/8"
+    ],
+    "moving:up": [
+      "farm/animals/cow-adult/cow-adult/9",
+      "farm/animals/cow-adult/cow-adult/10",
+      "farm/animals/cow-adult/cow-adult/11"
+    ]
+  },
+  "frames": {
+    "farm/animals/cow-adult/cow-adult/0": {
+      "frame": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/1": {
+      "frame": {
+        "x": 42,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/2": {
+      "frame": {
+        "x": 84,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/3": {
+      "frame": {
+        "x": 0,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/4": {
+      "frame": {
+        "x": 42,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/5": {
+      "frame": {
+        "x": 84,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/6": {
+      "frame": {
+        "x": 0,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/7": {
+      "frame": {
+        "x": 42,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/8": {
+      "frame": {
+        "x": 84,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/9": {
+      "frame": {
+        "x": 0,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/10": {
+      "frame": {
+        "x": 42,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/cow-adult/cow-adult/11": {
+      "frame": {
+        "x": 84,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    }
+  },
+  "meta": {
+    "format": "RGBA8888",
+    "image": "./cow-adult.png",
+    "scale": 1,
+    "size": {
+      "w": 126,
+      "h": 144
+    }
+  }
+}

public/assets/farm/animals/cow-adult/initial.js

@@ -0,0 +1,17 @@
+entity.Direction.direction = Math.random() * Math.TAU;
+
+entity.Controlled.directionMove(entity.Direction.direction);
+
+await wait(0.25 + Math.random() * 2.25);
+
+entity.Controlled.stop();
+
+entity.Sprite.isAnimating = 0;
+
+await wait(1 + Math.random() * 3);
+
+entity.Direction.direction = Math.random() * Math.TAU;
+
+await wait(0.5 + Math.random() * 2.5);
+
+entity.Sprite.isAnimating = 1;

public/assets/farm/animals/goat-white/goat-white.json

@@ -0,0 +1,263 @@
+{
+  "animations": {
+    "idle:up": [
+      "farm/animals/goat-white/goat-white/10"
+    ],
+    "idle:right": [
+      "farm/animals/goat-white/goat-white/7"
+    ],
+    "idle:down": [
+      "farm/animals/goat-white/goat-white/1"
+    ],
+    "idle:left": [
+      "farm/animals/goat-white/goat-white/4"
+    ],
+    "moving:down": [
+      "farm/animals/goat-white/goat-white/0",
+      "farm/animals/goat-white/goat-white/1",
+      "farm/animals/goat-white/goat-white/2"
+    ],
+    "moving:left": [
+      "farm/animals/goat-white/goat-white/3",
+      "farm/animals/goat-white/goat-white/4",
+      "farm/animals/goat-white/goat-white/5"
+    ],
+    "moving:right": [
+      "farm/animals/goat-white/goat-white/6",
+      "farm/animals/goat-white/goat-white/7",
+      "farm/animals/goat-white/goat-white/8"
+    ],
+    "moving:up": [
+      "farm/animals/goat-white/goat-white/9",
+      "farm/animals/goat-white/goat-white/10",
+      "farm/animals/goat-white/goat-white/11"
+    ]
+  },
+  "frames": {
+    "farm/animals/goat-white/goat-white/0": {
+      "frame": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/1": {
+      "frame": {
+        "x": 42,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/2": {
+      "frame": {
+        "x": 84,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/3": {
+      "frame": {
+        "x": 0,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/4": {
+      "frame": {
+        "x": 42,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/5": {
+      "frame": {
+        "x": 84,
+        "y": 36,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/6": {
+      "frame": {
+        "x": 0,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/7": {
+      "frame": {
+        "x": 42,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/8": {
+      "frame": {
+        "x": 84,
+        "y": 72,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/9": {
+      "frame": {
+        "x": 0,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/10": {
+      "frame": {
+        "x": 42,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    },
+    "farm/animals/goat-white/goat-white/11": {
+      "frame": {
+        "x": 84,
+        "y": 108,
+        "w": 42,
+        "h": 36
+      },
+      "spriteSourceSize": {
+        "x": 0,
+        "y": 0,
+        "w": 42,
+        "h": 36
+      },
+      "sourceSize": {
+        "w": 42,
+        "h": 36
+      }
+    }
+  },
+  "meta": {
+    "format": "RGBA8888",
+    "image": "./goat-white.png",
+    "scale": 1,
+    "size": {
+      "w": 126,
+      "h": 144
+    }
+  }
+}

public/assets/farm/animals/goat-white/initial.js

@@ -0,0 +1,17 @@
+entity.Direction.direction = Math.random() * Math.TAU;
+
+entity.Controlled.directionMove(entity.Direction.direction);
+
+await wait(0.25 + Math.random() * 2.25);
+
+entity.Controlled.stop();
+
+entity.Sprite.isAnimating = 0;
+
+await wait(1 + Math.random() * 3);
+
+entity.Direction.direction = Math.random() * Math.TAU;
+
+await wait(0.5 + Math.random() * 2.5);
+
+entity.Sprite.isAnimating = 1;

public/assets/hoe/start.js

@@ -13,25 +13,43 @@ if (projected?.length > 0) {
     Sound.play('/assets/hoe/dig.wav');
     for (const {x, y} of projected) {
       Emitter.emit({
-        count: 25,
-        frequency: 0.01,
-        shape: {
-          type: 'filledRect',
-          payload: {width: 16, height: 16},
-        },
         entity: {
-          Forces: {forceY: -50},
+          Behaving: {
+            routines: {
+              initial: 'await delta(entity.Forces, {forceY: {delta: 640, duration: 0.125}}).promise',
+            },
+          },
+          Forces: {forceY: -80},
           Position: {
             x: x * layer.tileSize.x + (layer.tileSize.x / 2),
             y: y * layer.tileSize.y + (layer.tileSize.y / 2),
           },
           Sprite: {
-            scaleX: 0.2,
-            scaleY: 0.2,
             tint: 0x552200,
           },
-          Ttl: {ttl: 0.125},
+          Ttl: {ttl: 0.35},
-        }
+        },
+        fields: [
+          {
+            path: ['Sprite', 'lightness'],
+            value: [0.05, 0.25],
+          },
+          {
+            path: ['Sprite', 'alpha'],
+            value: [0.5, 1],
+          },
+          {
+            path: ['Sprite', 'scale'],
+            value: [0.05, 0.1],
+          },
+        ],
+        frequency: 0.05,
+        shape: {
+          type: 'filledRect',
+          payload: {width: 12, height: 12},
+        },
+        spurt: 5,
+        ttl: 0.4,
       });
     }
     Sprite.animation = ['moving', direction].join(':');

public/assets/magic-swords/start.js

@@ -75,7 +75,7 @@ while (shots.length > 0) {
       )
       shot.Speed.speed = 400;
       shot.Direction.direction = (Math.TAU + toward) % Math.TAU;
-      if (Math.distance(where, shot.Position) < 4) {
+      if (accumulated[shot.id] > 1.5 || Math.distance(where, shot.Position) < 4) {
         delete accumulated[shot.id];
         shot.Sprite.alpha = 0;
         ecs.destroy(shot.id);

public/assets/watering-can/start.js

@@ -14,25 +14,31 @@ if (projected?.length > 0) {
 
   for (const {x, y} of projected) {
     Emitter.emit({
-      count: 25,
-      frequency: 0.01,
-      shape: {
-        type: 'filledRect',
-        payload: {width: 16, height: 16},
-      },
       entity: {
         Forces: {forceY: 100},
         Position: {
           x: x * layer.tileSize.x + (layer.tileSize.x / 2),
-          y: y * layer.tileSize.y - layer.tileSize.y,
+          y: y * layer.tileSize.y - (layer.tileSize.y / 4),
         },
         Sprite: {
-          scaleX: 0.2,
+          scaleX: 0.05,
-          scaleY: 0.2,
+          scaleY: 0.15,
           tint: 0x0022aa,
         },
-        Ttl: {ttl: 0.25},
+        Ttl: {ttl: 0.1},
-      }
+      },
+      fields: [
+        {
+          path: ['Sprite', 'lightness'],
+          value: [0.111, 0.666],
+        },
+      ],
+      frequency: 0.01,
+      shape: {
+        type: 'circle',
+        payload: {radius: 4},
+      },
+      ttl: 0.5,
     });
   }
   await wait(0.5);
@@ -49,6 +55,8 @@ if (projected?.length > 0) {
     Water.water[tileIndex] = Math.min(255, 64 + w);
   }
 
+  ecs.system('Water').schedule();
+
   Controlled.locked = 0;
 
 }