Cocos2d-android (06) 屏幕触摸事件及坐标转换

为屏幕添加触摸事件，将左上角坐标转换为左下角坐标

package com.arlen.cocos2d.touch01;

import org.cocos2d.layers.CCLayer;
import org.cocos2d.nodes.CCDirector;
import org.cocos2d.types.CGPoint;

import android.view.MotionEvent;

public class GameLayer extends CCLayer {

    // 接受用户的触摸事件，首先必须对当前图层进行设置

    public GameLayer() {
        this.setIsTouchEnabled(true);
    }

    // 当用户开始触摸事执行该方法
    @Override
    public boolean ccTouchesBegan(MotionEvent event) {

        // 以屏幕的左上角为原点
        float x = event.getX();
        float y = event.getY();

        CGPoint point1 = CGPoint.ccp(x, y);
        // 将左上角坐标转换为左下角坐标
        CGPoint point2 = CCDirector.sharedDirector().convertToGL(point1);
        System.out.println("ccTouchesBegan:");
        System.out.println("左上角坐标：" + point1.x + "," + point1.y);
        System.out.println("左下角坐标" + point2.x + "," + point2.y);
        
        return super.ccTouchesBegan(event);
    }

    // 当用户手指离开屏幕是执行此方法
    @Override
    public boolean ccTouchesEnded(MotionEvent event) {
        System.out.println("ccTouchesEnded");
        return super.ccTouchesEnded(event);
    }

    // 当用户手指在屏幕上移动的时候执行此方法
    @Override
    public boolean ccTouchesMoved(MotionEvent event) {
        System.out.println("ccTouchesMoved");
        return super.ccTouchesMoved(event);
    }
}