andengine 坐标系统

andengine坐标系统:横屏下  左上角顶点坐标为(0,0)

向右为x轴,向下为Y轴

e.g:

//x,y为sprite左上角的坐标

mTargetSprite=new Sprite(CAMERA_WIDTH/2,CAMERA_HEIGHT/2, this.mTargetTextureRegion);

scene.getTopLayer().addEntity(mBulletSprite);

在屏幕中心画精灵:

mTargetSprite=new Sprite(CAMERA_WIDTH/2-this.mTargetTextureRegion.getHeight()/2,CAMERA_HEIGHT/2-this.mTargetTextureRegion.getHeight()/2, this.mTargetTextureRegion);