在Typesript中创建FixedUpdate

Question

我正在用typescript开发一个游戏引擎来学习一些东西。在Unity中，固定更新的工作方式(理论上)如下：

 var physicsTimeSimulated = 0;
 var lastUpdateTime = 0;    

 while (Unity is Running)
 {
     while (physicsTimeSimulated < Time.time)
     {
         Engine.ExecutePhysicsStep();
         Engine.FixedUpdate(); // <-- sent to all objects
         physicsTimeSimulated += physicsTimeStep;
     }

     deltaTime = Time.time - lastUpdateTime;
     Engine.RenderFrame();
     Engine.Update(); // <-- sent to all objects
     lastUpdateTime = CurrentTime;

     // and repeat...
 }

在Typescript中实现这样的东西的好方法是什么？我执行update函数的方式如下：

private fixedUpdateTiming: number = 1;
private lastUpdate:number = Date.now();

public Update(): void {
    while((Date.now() - this.lastUpdate) > this.fixedUpdateTiming){
      this.onAppFixedUpdate.dispatch();
      this.lastUpdate = Date.now();
    }

    this.onAppUpdate.dispatch();

    window.requestAnimationFrame(() => {
      this.Update();
    });
  }

这样，每个fixedupdate可以有多个更新，但我每次更新只能得到一个fixedupdate。

提前谢谢你，Steenbrink

Answer 1

好吧，不要紧，我很愚蠢。我会在这里留下这个作为参考。

我修复它的方法如下：

private fixedUpdateTiming: number = 20;
private physicsTimeSimulated:number = Date.now();
private _deltaTime: number = 0;
private lastUpdate: number = Date.now();

public Update(): void {

    while(this.physicsTimeSimulated < Date.now()){

      this.onAppFixedUpdate.dispatch();
      this.physicsTimeSimulated += this.fixedUpdateTiming;
    }

    this.onAppUpdate.dispatch();

    this._deltaTime = Date.now() - this.lastUpdate;
    this.lastUpdate = Date.now();

    window.requestAnimationFrame(() => {
      this.Update();
    });
  }