flow: transient particles, isomorphic afterDeathTickers, setPosition

packages/entity/traits/alive.trait.js

@@ -148,9 +148,11 @@ export class Alive extends decorate(Trait) {
           this._context
         )
         this._dyingTickingPromise.then(() => {
-          this.entity.emit('died');
+          const diedPromises = this.entity.invokeHookFlat('died');
+          Promise.all(diedPromises).then(() => {
             this.entity.destroy();
           });
+        });
       },
 
     };

packages/physics/traits/emitted.trait.js

@@ -25,6 +25,7 @@ export class Emitted extends decorate(Trait) {
         start: 1,
         end: 1,
       },
+      transient: true,
       ttl: 2,
       velocity: [0, 0],
     };
@@ -49,6 +50,10 @@ export class Emitted extends decorate(Trait) {
     this.velocity = new Vector.Range(this.params.velocity);
   }
 
+  get isTransientParticle() {
+    return !!this.params.transient;
+  }
+
   methods() {
     return {
 

packages/physics/traits/emitter.trait.js

@@ -28,11 +28,13 @@ export class Emitter extends decorate(Trait) {
   }
 
   onParticleDead(particle) {
+    if (particle.isTransientParticle) {
       particle.body.destroy();
     }
+  }
 
   onParticleUpdate(particle) {
-    particle.body.position = [particle.p.x, particle.p.y];
+    particle.body.setPosition([particle.p.x, particle.p.y]);
     particle.body.opacity = particle.alpha;
     particle.body.visibleScale = [particle.scale, particle.scale];
     particle.body.rotation = particle.rotation * PI_180;
@@ -40,7 +42,6 @@ export class Emitter extends decorate(Trait) {
 
   hooks() {
     const hooks = {};
-    if (AVOCADO_CLIENT) {
     hooks.afterDestructionTickers = () => {
       return (elapsed) => {
         this.tick(elapsed);
@@ -50,7 +51,6 @@ export class Emitter extends decorate(Trait) {
         }
       };
     };
-    }
     return hooks;
   }