核心要点:3D物体碰撞是靠射线检测,射线与碰撞器相撞获取对应的碰撞点信息。

class RayPicking03 {
private ray: Laya.Ray;
private point: Laya.Vector2 = new Laya.Vector2();
private _outHitInfo: Laya.RaycastHit;
private _position: Laya.Vector3;
private _upVector3: Laya.Vector3;
private _vector3: Laya.Vector3;
private _offsetVector3: Laya.Vector3;
private box: Laya.MeshSprite3D;
private _rotateV3:Laya.Vector3;
private camera: Laya.Camera;
private label: Laya.Label;
constructor() {
Laya3D.init(0, 0, true);//初始化3D
Laya.stage.scaleMode = "full";//屏幕缩放方式
Laya.stage.screenMode = "none";
Laya.Stat.show(); var scene: Laya.Scene = Laya.stage.addChild(new Laya.Scene()) as Laya.Scene;//添加场景 this.point = new Laya.Vector2();//位置信息
this.ray = new Laya.Ray(new Laya.Vector3(0, 0, 0), new Laya.Vector3(0, 0, 0));//初始化射线
this._outHitInfo = new Laya.RaycastHit();//初始化射线信息
this._position = new Laya.Vector3(0, 0.25, 0);//位置
this._upVector3 = new Laya.Vector3(0, 1, 0);
this._rotateV3 = new Laya.Vector3(1, 0, 1);
this._vector3 = new Laya.Vector3();
this._offsetVector3 = new Laya.Vector3(0, 0.15, 0) //初始化照相机
this.camera = scene.addChild(new Laya.Camera(0, 0.1, 100)) as Laya.Camera;
this.camera.transform.translate(new Laya.Vector3(0, 2, 5));
this.camera.transform.rotate(new Laya.Vector3(-15, 0, 0), true, false);
this.camera.clearColor = null; //方向光
var directionLight: Laya.DirectionLight = scene.addChild(new Laya.DirectionLight()) as Laya.DirectionLight;
directionLight.color = new Laya.Vector3(0.6, 0.6, 0.6);
directionLight.direction = new Laya.Vector3(1, -1, -1); var plane: Laya.MeshSprite3D = scene.addChild(new Laya.MeshSprite3D(new Laya.PlaneMesh(6, 6, 10, 10))) as Laya.MeshSprite3D;//创建平面物体
var planeMat: Laya.StandardMaterial = new Laya.StandardMaterial();//标准材质
planeMat.diffuseTexture = Laya.Texture2D.load("../bin/res/layabox.png");//添加材质
planeMat.albedo = new Laya.Vector4(0.9, 0.9, 0.9, 1);
plane.meshRender.material = planeMat; var meshCollider = plane.addComponent(Laya.MeshCollider) as Laya.MeshCollider;//网格碰撞器
meshCollider.mesh = plane.meshFilter.sharedMesh;//网格过滤器,获取共享网格 this.box = scene.addChild(new Laya.MeshSprite3D(new Laya.SphereMesh(0.2, 8, 8))) as Laya.MeshSprite3D;//创建立方体
var mat: Laya.StandardMaterial = new Laya.StandardMaterial();
mat.diffuseTexture = Laya.Texture2D.load("../bin/res/layabox.png");
this.box.meshRender.material = mat; Laya.timer.frameLoop(1, this, this.checkHit); this.loadUI();
}
private checkHit(): void {
this.box.transform.position = this._position;
//this.box.transform.rotate(this._rotateV3, true, false)
//从屏幕空间生成射线
this.point.elements[0] = Laya.MouseManager.instance.mouseX;//鼠标X坐标
this.point.elements[1] = Laya.MouseManager.instance.mouseY;//鼠标Y坐标
this.camera.viewportPointToRay(this.point, this.ray);//从摄像机到鼠标点击位置生成射线
Laya.Physics.rayCast(this.ray, this._outHitInfo, 30, 0);//生成射线
} private loadUI(): void { this.label = new Laya.Label();
this.label.text = "点击移动";
this.label.pos(Laya.Browser.clientWidth / 2.5, 100);
this.label.fontSize = 50;
this.label.color = "#40FF40";
Laya.stage.addChild(this.label); //鼠标事件
Laya.stage.on(Laya.Event.MOUSE_UP, this, function (): void {
if (this._outHitInfo.distance !== -1) {
Laya.Vector3.add(this._outHitInfo.position, this._offsetVector3, this._vector3);
Laya.Tween.to(this._position, { x: this._vector3.x, y: this._vector3.y, z: this._vector3.z }, 500/**,Ease.circIn*/);
}
});
}
}