我正在使用AndEngine的这个方法向屏幕添加一个精灵并让它在屏幕上移动。
private void addFace() {
Random rand = new Random();
float x = (int) mCamera.getHeight() - mBallTextureRegion.getHeight();
float minY = mBallTextureRegion.getHeight();
float maxY = (int)(mCamera.getWidth() + mBallTextureRegion.getWidth());
float rangeY = maxY - minY;
float y = rand.nextInt((int)rangeY) + minY;
this.mFaceCount++;
Log.e("Faces: ", "Face" + this.mFaceCount);
Sprite face = null;
Body body = null;
face = new Sprite(x, y, this.mBallTextureRegion.clone());
body = PhysicsFactory.createBoxBody(this.mPhysicsWorld, face, BodyType.DynamicBody, FIXTURE_DEF);
this.mScene.attachChild(face);
this.mPhysicsWorld.registerPhysicsConnector(new PhysicsConnector(face, body, true, true));
int minDuration = 2;
int maxDuration = 4;
int rangeDuration = maxDuration - minDuration;
int actualDuration = rand.nextInt(rangeDuration) + minDuration;
MoveXModifier mod = new MoveXModifier(actualDuration, face.getX(), - face.getWidth());
face.registerEntityModifier(mod);
}
我想要做的是,不是选择随机位置而是将精灵添加到场景的左侧,我希望将它添加到顶部并倒下。
我基本上想要翻转方向, 我只是想弄清楚如何。我尝试的一切都没有运气。
有任何想法或建议吗?
答案 0 :(得分:3)
虽然我对Andengine了解不多,但我怀疑你想改变这些界限:
float x = (int) mCamera.getHeight() - mBallTextureRegion.getHeight();
float y = rand.nextInt((int)rangeY) + minY;
MoveXModifier mod = new MoveXModifier(actualDuration, face.getX(), - face.getWidth());
翻转x和y语句,但如果希望它显示在屏幕外,请将y设置为-mBallTextureRegion.getHeight()。
对于MoveXModifier,我猜有相应的MoveYModifier(分别使用face.getY()和-face.getHeight())