[LayaAir 2.0]rigidBody.applyForce 对刚体应用力，物体没有移动

1.问题描述

  如题，通过给物体施加力rigidBody.applyForce，物体没有发生移动。

2.重现步骤

在https://layaair2.ldc2.layabox.com/demo2/?language=ch&category=3d&group=Physics3D&name=PhysicsWorld_BaseCollider
粘贴以下代码执行：


//问题在 addSphere 方法
class PhysicsWorldBaseCollider{
    constructor(){
        //初始化引擎
        Laya3D.init(0, 0);
        //设置画布模式
        Laya.stage.scaleMode = Laya.Stage.SCALE_FULL;
        Laya.stage.screenMode = Laya.Stage.SCREEN_NONE;
        Laya.Stat.show();
        this.tmpVector = new Laya.Vector3(0, 0, 0);
        this.scene = Laya.stage.addChild(new Laya.Scene3D());
        //初始化照相机
        let camera = this.scene.addChild(new Laya.Camera(0, 0.1, 100));
        camera.transform.translate(new Laya.Vector3(0, 6, 9.5));
        camera.transform.rotate(new Laya.Vector3(-15, 0, 0), true, false);
        camera.addComponent(CameraMoveScript);
        camera.clearFlag = Laya.BaseCamera.CLEARFLAG_SOLIDCOLOR;
        //方向光
        let directionLight = this.scene.addChild(new Laya.DirectionLight());
        directionLight.diffuseColor = new Laya.Vector3(0.6, 0.6, 0.6);
        let mat = directionLight.transform.worldMatrix;
        mat.setForward(new Laya.Vector3(-1.0, -1.0, -1.0));
        directionLight.transform.worldMatrix = mat;

        //材质加载
        this.mat1 = new Laya.BlinnPhongMaterial;
        this.mat2 = new Laya.BlinnPhongMaterial;
        this.mat3 = new Laya.BlinnPhongMaterial;
        this.mat4 = new Laya.BlinnPhongMaterial;
        this.mat5 = new Laya.BlinnPhongMaterial;
        //添加漫反射贴图
        Laya.Texture2D.load("res/threeDimen/Physics/rocks.jpg", Laya.Handler.create(this, function (tex) {
            this.mat1.albedoTexture = tex;
        }));
        Laya.Texture2D.load("res/threeDimen/Physics/plywood.jpg", Laya.Handler.create(this, function (tex) {
            this.mat2.albedoTexture = tex;
        }));
        Laya.Texture2D.load("res/threeDimen/Physics/wood.jpg", Laya.Handler.create(this, function (tex) {
            this.mat3.albedoTexture = tex;
        }));
        Laya.Texture2D.load("res/threeDimen/Physics/steel2.jpg", Laya.Handler.create(this, function(tex) {
            this.mat4.albedoTexture = tex;
        }));
        Laya.Texture2D.load("res/threeDimen/Physics/steel.jpg", Laya.Handler.create(this, function(tex) {
            this.mat5.albedoTexture = tex;
        }));


        //平面加载
        let plane = this.scene.addChild(new Laya.MeshSprite3D(Laya.PrimitiveMesh.createPlane(10, 10, 10, 10)));
        let planeMat = new Laya.BlinnPhongMaterial();
        Laya.Texture2D.load("res/threeDimen/Physics/grass.png", Laya.Handler.create(null, function (tex) {
            planeMat.albedoTexture = tex;
        }));
        //拉伸UV
        planeMat.tilingOffset = new Laya.Vector4(10, 10, 0, 0);
        //板的画面的渲染材质
        plane.meshRenderer.material = planeMat;
        //创建球
        this.addSphere();
    }

    //添加球体
    addSphere(){
        let radius = 0.5;
        let sphere = this.scene.addChild(new Laya.MeshSprite3D(Laya.PrimitiveMesh.createSphere(radius)));
        sphere.meshRenderer.material = this.mat2;
        this.tmpVector.setValue(0, 2, 2);
        sphere.transform.position = this.tmpVector;
        let rigidBody = sphere.addComponent(Laya.Rigidbody3D);
        let sphereShape = new Laya.SphereColliderShape(radius);
        rigidBody.colliderShape = sphereShape;
        rigidBody.mass = 1;
        rigidBody.gravity = new Laya.Vector3(0, 0, 0);//取消重力
        rigidBody.applyForce(new Laya.Vector3(0, 0, -1000));//应用力
        //rigidBody.linearVelocity = new Laya.Vector3(0,0,-1);
        Laya.timer.loop(2000, this, function(){console.log(rigidBody.linearVelocity.z)});
    }

}


//激活启动类
new PhysicsWorldBaseCollider();