ios - 弹跳节点变得疯狂

Question

我正在构建一个小游戏，但遇到了问题。我制作了一些在屏幕中弹跳的球，目的是让它们以相同的速度在屏幕中弹跳。我的问题是，大约 30 秒后，球会疯狂地以尽可能快的速度在屏幕上弹跳。我该如何解决？

这是我的代码:

  int maxXCoord = self.frame.size.width;
int maxYCoord = self.frame.size.height;

int circleWidth = 6;

int x = arc4random() % (maxXCoord - (circleWidth / 2));
int y = arc4random() % (maxYCoord - (circleWidth / 2));

   SKSpriteNode* _numberint = [SKSpriteNode spriteNodeWithImageNamed: @"red.png"];
_numberint.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:(_numberint.frame.size.width/2)];

    _numberint.position = CGPointMake(x,y);


    _numberint.physicsBody.contactTestBitMask = ballCatagoryName;
    _numberint.physicsBody.collisionBitMask = ballCatagoryName;


     _numberint.physicsBody.friction = 0.8f;
_numberint.physicsBody.restitution = 1.2f;
_numberint.physicsBody.linearDamping = 0.0f;
_numberint.physicsBody.angularDamping = 0.0f;
_numberint.physicsBody.allowsRotation = NO;

[_numberint.physicsBody applyImpulse:CGVectorMake(8.0f, -8.0f)];

[self addChild:_numberint];

谢谢!

Answer 1

如果将 restitution 设置为高于 1.0 的值，则对象将在每次碰撞时加快速度。将 restitution 设置为 1.0 或更低。