Object Pooling for Entity Schemas in MapSchema Causes 'refId not found' Error"

[haipc01224]

My game currently adds and removes a large number of entity schemas using a mapSchema to manage entities, which causes heavy GC activity that monopolizes the main thread. I tried to implement an object pool for entities but haven't been successful. At the moment, I don't know how to reset or clear an entity so that it can be returned to the pool. If I keep the data unchanged, the client throws a 'refId not found' error.

[rogino]

I recently implemented this and have found that you need to reset $changes.refId to undefined so that Colyseus treats this as a new object.

However, unless you can guarantee that every single synchronized property will be overwritten with a new and different value, you must set all property to undefined.

If the old and new uses of the item happen to use the same value, it will not update the change tree. This means that that property is not synchronized and you get seemingly-random undefined fields on the client.

Example:

export class PointState extends Schema {
 @type("float32") x: number;
 @type("float32") y: number;

 constructor(x: number, y: number) {
   super();
   this.x = x;
   this.y = y;
 }

 /** Reset `$changes.refId` and all properties to `undefined` */
 wipe() {
   this["$changes"].refId = undefined as any;
   this.x = undefined as any;
   this.y = undefined as any;
   return this;
 }
}