feat: loot particles

common/traits/lootable.trait.js

@@ -1,6 +1,6 @@
 import {compose, Property} from '@avocado/core';
 import {StateProperty, Trait, Entity} from '@avocado/entity';
-import {Rectangle, Vector} from '@avocado/math';
+import {randomNumber, Rectangle, Vector} from '@avocado/math';
 
 const decorate = compose(
   StateProperty('lootable', {
@@ -41,28 +41,41 @@ export class Lootable extends decorate(Trait) {
     return jsons;
   }
 
-  listeners() {
-    const listeners = {};
+  hooks() {
+    const hooks = {};
     if (AVOCADO_SERVER) {
-      listeners['died'] = () => {
+      hooks['died'] = () => {
         const jsons = this.calculateLoot();
         const position = this.entity.position;
+        const promises = [];
         for (let i = 0; i < jsons.length; i++) {
-          const offset = Vector.sub(
-            [
-              Math.floor(Math.random() * 16),
-              Math.floor(Math.random() * 16)
-            ],
-            [8, 8]
-          );
-          this.entity.spawnRawAt(
-            Vector.add(position, offset),
-            jsons[i]
-          );
+          const json = jsons[i];
+          if (!json.traits) {
+            json.traits = {};
           }
+          json.traits.emitted = {
+            params: {
+              force: [0, 16],
+              velocity: [
+                randomNumber(-0.5, 0.5),
+                randomNumber(-2.5, -1.5)
+              ],
+              position,
+              transient: false,
+              ttl: 0.25,
+            },
+          };
+          const promise = this.entity.emitParticleJson(
+            json
+          ).then((particle) => {
+            this.entity.list.addEntity(particle);
+          });
+          promises.push(promise);
+        }
+        return Promise.all(promises);
       };
     }
-    return listeners;
+    return hooks;
   }
 
 }

server/fixtures/kitty.entity.js

@@ -119,12 +119,6 @@ export function kittyJSON() {
       lootable: {
         params: {
           table: [
-            {
-              perc: 20,
-              json: {
-                uri: '/rock.entity.json',
-              },
-            },
             {
               perc: 70,
               json: {
@@ -151,7 +145,6 @@ export function kittyJSON() {
           },
         },
       },
-      spawner: {},
       vulnerable: {},
     },
   };