TouchEvent3D 触摸事件
- 演示准备
创建一个演示场景:
class Main {
protected _egret3DCanvas: egret3d.Egret3DCanvas;
protected view1: egret3d.View3D;
protected cube: egret3d.Mesh;
public constructor() {
///创建3DCanvas
this._egret3DCanvas = new egret3d.Egret3DCanvas();
this._egret3DCanvas.x = 0;
this._egret3DCanvas.y = 0;
this._egret3DCanvas.width = window.innerWidth;
this._egret3DCanvas.height = window.innerHeight;
this._egret3DCanvas.start();
///创建View3D
this.view1 = new egret3d.View3D(0, 0, window.innerWidth, window.innerHeight);
this.view1.camera3D.lookAt(new egret3d.Vector3D(0, 1000, -1000), new egret3d.Vector3D(0, 0, 0));
this.view1.backColor = 0xff888888;
this._egret3DCanvas.addView3D(this.view1);
///启动3DCanvas
this._egret3DCanvas.start();
///创建立方体,放置于场景内(0,0,0)位置
var mat_cube: egret3d.TextureMaterial = new egret3d.TextureMaterial();
var geometery_Cube: egret3d.CubeGeometry = new egret3d.CubeGeometry();
this.cube = new egret3d.Mesh(geometery_Cube, mat_cube);
this.view1.addChild3D(this.cube);
///创建面片,放置于场景内(0,0,0)位置
var mat_Plane: egret3d.TextureMaterial = new egret3d.TextureMaterial();
var geometery_Plane: egret3d.PlaneGeometry = new egret3d.PlaneGeometry();
var plane = new egret3d.Mesh(geometery_Plane, mat_Plane);
this.view1.addChild3D(plane);
}
}
1) 触摸事件只能在手机上进行测试演示。
2)响应事件时的参数e: egret3d.TouchEvent3D,参数内数据说明:
a) screenX:相对于用户屏幕水平偏移量,而screenY也就是垂直方向的,此时的参照点也就是原点是屏幕的左上角。
b)clientX:跟screenX相比就是将参照点改成了浏览器内容区域的左上角,该参照点会随之滚动条的移动而移动。
c) pageX:参照点也是浏览器内容区域的左上角,但它不会随着滚动条而变动
b)canvasX:相对于Egret3DCanvas水平偏移量,而canvasY也就是垂直方向的,此时的参照点也就是原点是Egret3DCanvas的左上角。
3)示例代码:这是我们制作一个控制cube旋转的代码。
class Main {
protected _egret3DCanvas: egret3d.Egret3DCanvas;
protected view1: egret3d.View3D;
private x_Cur: number = 0;
private cube: egret3d.Mesh;
public constructor() {
///创建3DCanvas
this._egret3DCanvas = new egret3d.Egret3DCanvas();
this._egret3DCanvas.x = 0;
this._egret3DCanvas.y = 0;
this._egret3DCanvas.width = window.innerWidth;
this._egret3DCanvas.height = window.innerHeight;
this._egret3DCanvas.start();
///创建View3D
this.view1 = new egret3d.View3D(0, 0, window.innerWidth, window.innerHeight);
this.view1.camera3D.lookAt(new egret3d.Vector3D(0, 1000, -1000), new egret3d.Vector3D(0, 0, 0));
this.view1.backColor = 0xff888888;
this._egret3DCanvas.addView3D(this.view1);
///启动3DCanvas,注册每帧更新事件
this._egret3DCanvas.start();
///创建立方体,放置于场景内(0,0,0)位置
var mat_cube: egret3d.TextureMaterial = new egret3d.TextureMaterial();
var geometery_Cube: egret3d.CubeGeometry = new egret3d.CubeGeometry();
this.cube = new egret3d.Mesh(geometery_Cube, mat_cube);
this.view1.addChild3D(this.cube);
///创建面片,放置于场景内(0,0,0)位置
var mat_Plane: egret3d.TextureMaterial = new egret3d.TextureMaterial();
var geometery_Plane: egret3d.PlaneGeometry = new egret3d.PlaneGeometry();
var plane = new egret3d.Mesh(geometery_Plane, mat_Plane);
this.view1.addChild3D(plane);
///注册事件,持有对象为IRender,需要依次写入事件标识符,注册方法和注册对象。
egret3d.Input.addEventListener(egret3d.TouchEvent3D.TOUCH_START, this.OnTouchStart, this);
egret3d.Input.addEventListener(egret3d.TouchEvent3D.TOUCH_END, this.OnTouchEnd, this);
egret3d.Input.addEventListener(egret3d.TouchEvent3D.TOUCH_MOVE, this.OnTouchMove, this);
///开启手机屏幕日志信息显示
egret3d.Debug.instance.isDebug = true;
}
///触摸开始事件。
public OnTouchStart(e: egret3d.TouchEvent3D) {
egret3d.Debug.instance.trace("OnTouchStart");
}
///触摸结束事件
public OnTouchEnd(e: egret3d.TouchEvent3D) {
egret3d.Debug.instance.trace("OnTouchEnd");
}
///触摸移动事件
public OnTouchMove(e: egret3d.TouchEvent3D) {
if (this.x_Cur - e.targetTouches[0].clientX > 0) {
this.cube.rotationY += 4;
} else {
this.cube.rotationY -= 4;
}
this.x_Cur = e.targetTouches[0].clientX;
}
}