[]没有人尝试使用3d物理引擎么

还处于摸索阶段，想问下大家没人在做3d游戏么，物理引擎这块怎么解决的？
我找到了一个叫做“cannon.js”的3d物理引擎项目：

http://www.cannonjs.org/ 

感觉它的结构还算清晰，api也比较详细简洁，目前我是尝试了通过创建cannon的物理场景和刚体几何体对象，由laya.timer驱动cannon解算物理变化，然后不断把cannon世界里的物体变化实时赋值给laya场景里的物体，但是感觉效率有点低啊……
 
比如：

package

{

	import laya.d3.core.BaseCamera;

	import laya.d3.core.Camera;

	import laya.d3.core.MeshSprite3D;

	import laya.d3.core.light.DirectionLight;

	import laya.d3.core.material.StandardMaterial;

	import laya.d3.core.scene.Scene;

	import laya.d3.math.RandX;

	import laya.d3.math.Vector3;

	import laya.d3.resource.Texture2D;

	import laya.d3.resource.TextureCube;

	import laya.d3.resource.models.BoxMesh;

	import laya.d3.resource.models.QuadMesh;

	import laya.d3.resource.models.SkyBox;

	import laya.display.Stage;

	import laya.utils.Browser;

	import laya.utils.Stat;

	import laya.utils.Timer;

	

	import threeDimen.common.CameraMoveScript;

	import threeDimen.common.CameraStat;

	import threeDimen.common.SpriteMoveScript;

	import threeDimen.common.SpriteStat;



	public class LayaAir3D

	{



		private var box:MeshSprite3D;



		private var sphereBody:Object;



		private var world:Object;



		private var CANNON:Object;



		public function LayaAir3D()

		{



			//初始化引擎

			Laya3D.init(0, 0, true);



			//适配模式

			Laya.stage.scaleMode=Stage.SCALE_FULL;

			Laya.stage.screenMode=Stage.SCREEN_VERTICAL;



			//开启统计信息

			Stat.show();



			//添加3D场景

			var scene:Scene=Laya.stage.addChild(new Scene()) as Scene;



			//添加照相机

			var camera:Camera=(scene.addChild(new Camera(0, 0.1, 100))) as Camera;

			camera.transform.translate(new Vector3(0, 3, 6));

			camera.transform.rotate(new Vector3(-15, 0, 0), true, false);

			camera.clearColor=null;

			camera.addComponent(CameraMoveScript);

			CameraStat.show(camera, 200, 0);



			//添加方向光

			var directionLight:DirectionLight=scene.addChild(new DirectionLight()) as DirectionLight;

			directionLight.ambientColor=new Vector3(0.6, 0.6, 0.6);

			directionLight.specularColor=new Vector3(0.6, 0.6, 0.6);

			directionLight.diffuseColor=new Vector3(1.6, 1.6, 1.6);

			directionLight.direction=new Vector3(1, -1, 0);



			//添加自定义模型

			box=scene.addChild(new MeshSprite3D(new BoxMesh(1, 1, 1))) as MeshSprite3D;

			box.transform.rotate(new Vector3(0, 0, 0), false, false);

			var material:StandardMaterial=new StandardMaterial();

			material.diffuseTexture=Texture2D.load("res/layabox.png");

			box.meshRender.material=material;



			box.addComponent(SpriteMoveScript);

			SpriteStat.show(box, 200, 50);





			//添加场景地板

			var floor:MeshSprite3D=scene.addChild(new MeshSprite3D(new QuadMesh(100, 100))) as MeshSprite3D;

			var floorMat:StandardMaterial=new StandardMaterial();

			floorMat.diffuseTexture=Texture2D.load("res/bw.jpg");

			floor.meshRender.material=floorMat;



			//添加天空盒

			camera.clearFlag=BaseCamera.CLEARFLAG_SKY;

			var sky:SkyBox=new SkyBox();

			sky.textureCube=TextureCube.load("res/skybox/skybox.ltc");

			camera.sky=sky;



			initCannon();



		}



		private function initCannon():void

		{

			CANNON=Browser.window.CANNON;

			world=new CANNON.World();

			world.gravity.set(0, 0, -9.8);



			// 设置碰撞检测类型

			world.broadphase=new CANNON.NaiveBroadphase();



			// 创建几何体（几何体和物理实体），添加到加农世界

			// 球体，质量5，半径1

			var mass:Object=50, radius:Object=1;

			var sphereShape:Object=new CANNON.Sphere(radius);

			sphereBody=new CANNON.Body({mass: mass, shape: sphereShape});

			sphereBody.position.set(0, 0, 100);

			world.add(sphereBody);



			// 创建世界平面，添加到加农世界

			var groundShape:Object=new CANNON.Plane();

			var groundBody:Object=new CANNON.Body({mass: 0, shape: groundShape});



			world.add(groundBody);



			// 运算器步进时长

			var timeStep:Object=1.0 / 60.0;

			

			

			box.timer.loop(1000/60,this,cannonUpdate);



		}

		

		private function cannonUpdate():void{

			// 循环步进驱动解算

			world.step(1.0 / 60.0);

			if(box.timer.currFrame %500 == 0){

				sphereBody.velocity = new CANNON.Vec3(0,0,20) as Object;

			}

			box.transform.translate(new Vector3(0, sphereBody.position.z - box.transform.position.y, 0));



		}

			

	}

}