我正在开发一个联系人扮演重要角色的应用程序。我是我的游戏，“鞋子”在地上休息。我需要能够知道鞋子何时在地面上，所以它不会多跳。我还需要知道什么时候鞋子遇到了障碍，所以比赛将结束。我的问题是，它认为地面是实际障碍的障碍。
import SpriteKit
类GameScene：SKScene，SKPhysicsContactDelegate {
var shoeGround = SKSpriteNode()
var hurdleTexture = SKTexture()
var hurdlesMoveAndRemove = SKAction()
var hurdlesStopAndRemove = SKAction()
var jump = false
//collision bitmask
let shoeGroundCategory:UInt32 = 0x1 << 0
let hurdleCategory:UInt32 = 0x1 << 28
let groundSensorCategory: UInt32 = 0x1 << 3
override func didMoveToView(view: SKView) {
//Physics
self.physicsWorld.gravity = CGVectorMake(0.0, -8.0)
self.physicsWorld.contactDelegate = self
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//ground
var groundTexture = SKTexture(imageNamed:"ground")
var sprite = SKSpriteNode(texture: groundTexture)
//scale it
sprite.setScale(2.1)
//position it
sprite.position = CGPointMake(self.size.width / 2, sprite.size.height / 2)
//add it to the scene
self.addChild(sprite)
//ground variable for the node
var ground = SKSpriteNode()
//set the position of the node
ground.position = CGPointMake(0, groundTexture.size().height)
ground.zPosition = 1000
//set the physics body to equal the size of the image.
ground.physicsBody = SKPhysicsBody(rectangleOfSize:CGSizeMake(self.frame.size.width, groundTexture.size().height * 1.85))
//physics bodies
ground.physicsBody?.dynamic = false
ground.physicsBody?.restitution = CGFloat(0.0)
//add the object to the scene
self.addChild(ground)
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//ground
var groundSensorTexture = SKTexture(imageNamed:"ground")
var spriteSensor = SKSpriteNode(texture: groundSensorTexture)
//scale it
spriteSensor.setScale(2.1)
//position it
spriteSensor.position = CGPointMake(self.size.width / 2, spriteSensor.size.height / 2)
//add it to the scene
self.addChild(sprite)
//ground variable for the node
var groundSensor = SKSpriteNode()
//set the position of the node
groundSensor.position = CGPointMake(0, groundSensorTexture.size().height)
groundSensor.zPosition = 1000
//set the physics body to equal the size of the image.
groundSensor.physicsBody = SKPhysicsBody(rectangleOfSize:CGSizeMake(self.frame.size.width, groundSensorTexture.size().height * 1.85))
//physics bodies
groundSensor.physicsBody?.dynamic = false
groundSensor.physicsBody?.restitution = CGFloat(0.0)
groundSensor.physicsBody?.categoryBitMask = groundSensorCategory
groundSensor.physicsBody?.contactTestBitMask = shoeGroundCategory | hurdleCategory
//add the object to the scene
self.addChild(ground)
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//shoe
var shoeGroundTexture = SKTexture(imageNamed:"default_shoe")
//change texture filtering mode.
shoeGroundTexture.filteringMode = SKTextureFilteringMode.Nearest
//Make the object.
shoeGround = SKSpriteNode(texture: shoeGroundTexture)
//set scale
shoeGround.setScale(0.35)
//position it.
shoeGround.position = CGPointMake(self.frame.size.width * 0.35, ((groundSensorTexture.size().height * 2.0) + (shoeGround.frame.size.height/2)))
shoeGround.zPosition = 100
//give it the collision collider of a circle.
shoeGround.physicsBody = SKPhysicsBody(circleOfRadius: shoeGround.size.height / 2)
shoeGround.physicsBody?.dynamic = true
shoeGround.physicsBody?.allowsRotation = false
shoeGround.physicsBody?.restitution = CGFloat(0.0)
shoeGround.physicsBody?.categoryBitMask = shoeGroundCategory
shoeGround.physicsBody?.contactTestBitMask = groundSensorCategory | hurdleCategory
//add it to the scene
self.addChild(shoeGround)
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//Hurdles
//Create the Hurdles.
hurdleTexture = SKTexture(imageNamed:"hurdle")
//Spawn the Hurdles.
let spawn = SKAction.runBlock({() in self.spawnHurdles()})
var time = arc4random() % 3
time += 2
let delay = SKAction.waitForDuration(2.0, withRange: 2.0)
let spawnThenDelay = SKAction.sequence([spawn, delay])
let spawnThenDelayForever = SKAction.repeatActionForever(spawnThenDelay)
self.runAction(spawnThenDelayForever)
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
func didBeginContact(contact: SKPhysicsContact) {
var firstBody, secondBody, thirdBody: SKPhysicsBody
if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
firstBody = contact.bodyA
secondBody = contact.bodyB
} else {
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if ((firstBody.categoryBitMask & shoeGroundCategory) != 0 && (secondBody.categoryBitMask & hurdleCategory != 0)) {
//secondBody.node?.removeFromParent()
println("Hurdle")
}
if ((firstBody.categoryBitMask & shoeGroundCategory != 0) && (secondBody.categoryBitMask & groundSensorCategory != 0)) {
//secondBody.node?.removeFromParent()
jump = true
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
func didEndContact(contact: SKPhysicsContact) {
var firstBody, secondBody: SKPhysicsBody
if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
firstBody = contact.bodyA
secondBody = contact.bodyB
} else {
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if ((firstBody.categoryBitMask & shoeGroundCategory != 0) &&
(secondBody.categoryBitMask & groundSensorCategory != 0)) {
//secondBody.node?.removeFromParent()
jump = false
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
/* Called when a touch begins */
moveHurdles()
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
if jump == true {
shoeGround.physicsBody?.velocity = CGVectorMake(0, 0)
shoeGround.physicsBody?.applyImpulse(CGVectorMake(0, 82))
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
func spawnHurdles() {
let hurdle = SKSpriteNode(texture: hurdleTexture)
hurdle.setScale(2.0)
hurdle.position = CGPointMake(0, 175)
hurdle.physicsBody = SKPhysicsBody(rectangleOfSize:hurdle.size)
hurdle.physicsBody?.dynamic = false
hurdle.physicsBody?.categoryBitMask = hurdleCategory
hurdle.physicsBody?.contactTestBitMask = shoeGroundCategory | groundSensorCategory
hurdle.runAction(hurdlesMoveAndRemove)
self.addChild(hurdle)
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//movement of Hurdles.
func moveHurdles() {
let distanceToMove = CGFloat(self.frame.size.width + 10.0 * hurdleTexture.size().width)
let moveHurdles = SKAction.moveByX(-distanceToMove, y: 0, duration: NSTimeInterval(0.00185 * distanceToMove))
let removeHurdles = SKAction.removeFromParent()
hurdlesMoveAndRemove = SKAction.sequence([moveHurdles, removeHurdles])
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
func stopHurdles() {
let distanceToMove = CGFloat(self.frame.size.width + 10.0 * hurdleTexture.size().width)
let stopHurdles = SKAction.moveByX(0, y: 0, duration: NSTimeInterval(0.00185 * distanceToMove))
let removeHurdles = SKAction.removeFromParent()
hurdlesStopAndRemove = SKAction.sequence([stopHurdles, removeHurdles])
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}
答案 0 :(得分：0)
检查鞋子是否在地上的一种方法是在Update功能上实施条件。
根据您的障碍和地面，条件是检查鞋子的y坐标以及是否低于某个阈值。
第二种方法是检查精灵的速度是否接近于零。