大佬教程收集整理的这篇文章主要介绍了swift – 在移动平台上移动节点,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
在本文中,解释了问题:移动平台地狱
http://www.learn-cocos2d.com/2013/08/physics-engine-platformer-terrible-idea/
但是SpriteKit怎么样?
更新
我正在使用平台
let moveHPart1 = SKAction.moveByX(origW,y: 0,duration: moveDuration); let moveHPart2 = SKAction.moveByX(-origW,duration: moveDuration); platform(SKAction.repeatActionForever(SKAction.sequence([moveHPart1,moveHPart2])));
静态平台
对于静态平台,将物理体动态属性设置为false是完美的解决方案.这就是它的意义.静态物体不受力的影响,但仍然会给你一个碰撞响应.所以,问题就解决了.
但是你无法通过使用力来改变静态物理体的位置.您可以使用操作或手动设置其位置来执行此操作.但是,那么你正在从物理模拟中移除一个平台.
为了完成所有物理学,你必须保持平台的动态.但这可能导致其他问题.例如,当玩家登陆平台时,他会将平台向下推,因为玩家有一个质量.
即使平台质量很大,它也会随着时间的流逝而下降.请记住,我们不能手动更新平台x位置,因为这可能会使物理模拟变得混乱.
“移动平台地狱”中所说的那个很好的article的LearnCocos2d可能是使用物理学完成这项任务时可能发生的最佳描述:-)
移动平台示例
为了向您展示一些可能性,我做了一个简单的例子,说明如何通过对其施加力来移动平台,并使角色留在它上面.为了使其工作,我做了很少的事情:
>改变了大量的平台.当玩家从下面碰到平台时,这将阻止平台移动.
>制作一个基于边缘的物理机构,以防止玩家落地时平台掉落.
>使用诸如允许旋转和摩擦等属性来获得所需效果.
这是代码:
import SpriteKit class GameScene: SKScene,SKPhysicsContactDelegate { let BodyCategory : UInt32 = 0x1 << 1 let PlatformCategory : UInt32 = 0x1 << 2 let WallCategory : UInt32 = 0x1 << 3 let EdgeCategory : UInt32 = 0x1 << 4 // This will prevent a platforom from falling down let PlayerCategory : UInt32 = 0x1 << 5 let platformSpeed: CGFloat = 40.0 let body = SKShapeNode(circLeofRadius: 20.0) let player = SKShapeNode(circLeofRadius: 20.0) let platform = SKSpriteNode(color: SKColor.greenColor(),size: CGSize(width:100,height:20)) let notDynamicPlatform = SKSpriteNode(color: SKColor.greenColor(),height:20)) override func didMoveToView(view: SKView) { //Setup contact delegate so we can use didBeginContact and didEndContact methods physicsWorld.contactDelegate = self //Setup borders self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.framE) self.physicsBody?.categoryBitMask = WallCategory self.physicsBody?.collisionBitMask = BodyCategory | PlayerCategory //Setup some physics body object body.position = CGPoint(x: CGRectGetMidX(self.framE),y: CGRectGetMidY(self.framE)) body.fillColor = SKColor.greenColor() body.physicsBody = SKPhysicsBody(circLeofRadius: 20) body.physicsBody?.categoryBitMask = BodyCategory body.physicsBody?.contactTESTBitMask = PlatformCategory body.physicsBody?.collisionBitMask = PlatformCategory | WallCategory body.physicsBody?.allowsRotation = false body.physicsBody?.dynamic = true self.addChild(body) //Setup player player.position = CGPoint(x: CGRectGetMidX(self.framE),y:30) player.fillColor = SKColor.greenColor() player.physicsBody = SKPhysicsBody(circLeofRadius: 20) player.physicsBody?.categoryBitMask = PlayerCategory player.physicsBody?.contactTESTBitMask = PlatformCategory player.physicsBody?.collisionBitMask = PlatformCategory | WallCategory | BodyCategory player.physicsBody?.allowsRotation = false player.physicsBody?.friction = 1 player.physicsBody?.dynamic = true self.addChild(player) //Setup platform platform.position = CGPoint(x: CGRectGetMidX(self.framE),y: CGRectGetMidY(self.framE) - 100) platform.physicsBody = SKPhysicsBody(rectangLeofSize: platform.sizE) platform.physicsBody?.categoryBitMask = PlatformCategory platform.physicsBody?.contactTESTBitMask = BodyCategory platform.physicsBody?.collisionBitMask = BodyCategory | EdgeCategory | PlayerCategory platform.physicsBody?.allowsRotation = false platform.physicsBody?.affectedByGravity = false platform.physicsBody?.dynamic = true platform.physicsBody?.friction = 1.0 platform.physicsBody?.restitution = 0.0 platform.physicsBody?.mass = 20 //Setup edge let edge = SKNode() edge.physicsBody = SKPhysicsBody(edgeFromPoint: CGPoint(x: 0,y:-platform.size.height/2),toPoint: CGPoint(x: self.frame.size.width,y:-platform.size.height/2)) edge.position = CGPoint(x:0,y: CGRectGetMidY(self.framE) - 100) edge.physicsBody?.categoryBitMask = EdgeCategory edge.physicsBody?.collisionBitMask = PlatformCategory self.addChild(edgE) self.addChild(platform) } override func @R_197_9531@e(currentTime: NSTimeInterval) { if(platform.position.x <= platform.size.width/2.0 + 20.0 && platform.physicsBody?.veLocity.dx < 0.0 ){ platform.physicsBody?.veLocity = CGVectorMake(platformSpeed,0.0) }else if((platform.position.x >= self.frame.size.width - platform.size.width/2.0 - 20.0) && platform.physicsBody?.veLocity.dx >= 0.0){ platform.physicsBody?.veLocity = CGVectorMake(-platformSpeed,0.0) }else if(platform.physicsBody?.veLocity.dx > 0.0){ platform.physicsBody?.veLocity = CGVectorMake(platformSpeed,0.0) }else{ platform.physicsBody?.veLocity = CGVectorMake(-platformSpeed,0.0) } } override func touchesBegan(touches: NSSet,withEvent event: UIEvent) { let touch: AnyObject? = touches.anyObject() let LOCATIOn = touch?.LOCATIOnInNode(self) if(LOCATIOn?.x > 187.5){ player.physicsBody?.applyImpulse(CGVector(dx: 3,dy: 50)) }else{ player.physicsBody?.applyImpulse(CGVector(dx: -3,dy: 50)) } } }
结果如下:
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