如何更改精灵在场景中随机出现的位置？
我将此方法与 AndEngine 结合使用，将精灵添加到屏幕并使其在屏幕上移动。
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
，我希望将其添加到顶部并落下，而不是选择随机位置并将精灵添加到场景的左侧。
我基本上想翻转方向 我就是不知道怎么办。我尝试的一切都不走运。
有什么想法或建议吗？
I am using this method with AndEngine to add a sprite to the screen and make it move across the screen.
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);
}
What i would like to do is, instead of the Random position being selected and the sprite being added to the left side of the Scene, i would like for it to be added to the Top and fall down.
I basically want to flip the direction,
I just cant figure out how. Everything i tried was no luck.
Any ideas or suggestions?
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虽然我对 Andengine 不太了解，但我怀疑您想要更改这些行：
翻转 x 和 y 语句，但如果您希望它出现在屏幕之外，请将 y 设置为 -mBallTextureRegion.getHeight() 。
对于MoveXModifier，我猜有一个相应的MoveYModifier（分别使用face.getY()和-face.getHeight()）
While I don't know much about Andengine, I suspect you would want to change these lines:
Flip the x and y statements, but set y to -mBallTextureRegion.getHeight() if you want it to appear outside the screen.
For the MoveXModifier, I would guess there is a corresponding MoveYModifier (use face.getY() and -face.getHeight() respectively)