I have a problem with the following sprite kit code. I'm trying to detect when a flying ball is colliding with a line. However nothing happens when the two collide. However when the ball hits the edge of the scene, the following is printed out:
contact 1
bitmask1: 4294967295
bitmask2: 4294967295
Problem 1: Why aren't the line and ball collisions being detected?
Problem 2: Why are both of the bitmask the same on edge collision? I can't work with the bodies if I don't know which is which.
struct PhysicsCategory {
static let None : UInt32 = 0
static let All : UInt32 = UInt32.max
static let Ball : UInt32 = 0b1 // 1
static let Line : UInt32 = 0b10 // 2
static let Shape : UInt32 = 0b100 // 3 or 4?
}
override func didMoveToView(view: SKView) {
/* Setup your scene here */
physicsWorld.contactDelegate = self
self.physicsBody = SKPhysicsBody(edgeLoopFromRect: view.frame);
self.physicsWorld.gravity = CGVectorMake(0.0, 0.0);
let ball = SKShapeNode(circleOfRadius: 5)
ball.fillColor = UIColor.whiteColor()
ball.strokeColor = UIColor.whiteColor()
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.frame.size.width/2)
ball.physicsBody?.velocity = CGVector(dx: 200.0, dy: 200.0)
ball.position = CGPoint(x: view.bounds.width/2, y:view.bounds.height/2)
ball.physicsBody?.friction = 0.0;
ball.physicsBody?.restitution = 1.0;
ball.physicsBody?.linearDamping = 0.0;
ball.physicsBody?.allowsRotation = false
ball.physicsBody?.applyImpulse(CGVector(dx:CGFloat(100), dy:CGFloat(100)));
ball.physicsBody?.categoryBitMask = PhysicsCategory.Ball
ball.physicsBody?.dynamic = true
ball.physicsBody?.contactTestBitMask = PhysicsCategory.Line
ball.physicsBody?.collisionBitMask = PhysicsCategory.Line
self.addChild(ball)
}
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
touch = touches.anyObject() as UITouch!
var linePhysicsBody = SKPhysicsBody()
linePhysicsBody.categoryBitMask = PhysicsCategory.Line
linePhysicsBody.contactTestBitMask = PhysicsCategory.Ball
linePhysicsBody.collisionBitMask = PhysicsCategory.Ball
linePhysicsBody.dynamic = false
linePhysicsBody.usesPreciseCollisionDetection = true
lineNode = SKShapeNode()
lineNode.physicsBody = linePhysicsBody
lineNode.name = "drawingLine"
lineNode.path = linePath
lineNode.lineWidth = 5.0
lineNode.strokeColor = UIColor.redColor()
lineNode.glowWidth = 1.0
self.addChild(lineNode)
}
func didBeginContact(contact: SKPhysicsContact) {
println("contact \(++tempCounter)")
println("bitmask1: \(contact.bodyA.categoryBitMask)")
println("bitmask2: \(contact.bodyA.categoryBitMask)")
}
For Problem 1:
your line physics body has a size of 0. You have to create at least a small rectangle which represents the line. Otherwize there is no collision.
For Problem 2:
func didBeginContact(contact: SKPhysicsContact) {
println("contact \(++tempCounter)")
println("bitmask1: \(contact.bodyA.categoryBitMask)")
println("bitmask2: \(contact.bodyA.categoryBitMask)")
}
There's a typo. You must use bodyB for bitmask2
Related
There's a ball and a paddle, the ball should be on the paddle and touching it but the ball never touches the paddle and stops before reaching the paddle, can anyone help me out?
import SpriteKit
class GameScene: SKScene ,SKPhysicsContactDelegate {
let ballCategory:UInt32 = 0x1 << 0
let bottomCategory:UInt32 = 0x1 << 1
let paddleCategory:UInt32 = 0x1 << 2
override init(size: CGSize){
super.init(size: size)
physicsWorld.contactDelegate = self
let ball = SKSpriteNode(imageNamed: "ball")
ball.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
addChild(ball)
ball.physicsBody = SKPhysicsBody(circleOfRadius: self.frame.size.width / 2)
ball.physicsBody?.dynamic = true
ball.physicsBody?.allowsRotation = false
ball.physicsBody?.friction = 0
// ball.physicsBody?.applyImpulse(CGVectorMake(2,-2))
ball.physicsBody?.categoryBitMask = ballCategory
ball.physicsBody?.contactTestBitMask = paddleCategory
ball.physicsBody?.collisionBitMask = paddleCategory
ball.physicsBody?.affectedByGravity = true
let paddle = SKSpriteNode(imageNamed: "paddle")
paddle.position = CGPointMake(CGRectGetMidX(self.frame), paddle.frame.size.height * 2)
addChild(paddle)
paddle.physicsBody = SKPhysicsBody(rectangleOfSize: paddle.frame.size)
paddle.physicsBody?.affectedByGravity = false
paddle.physicsBody?.dynamic = false
paddle.physicsBody?.categoryBitMask = paddleCategory
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
}
func didBeginContact(contact: SKPhysicsContact) {
print("touched")
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}
The best way to determine where your nodes are making contact is to turn on Physics.
Open GameViewController.swift and enter the following code:
skView.showsPhysics = true
You are experiencing this issue because of this line:
ball.physicsBody = SKPhysicsBody(circleOfRadius: self.frame.size.width / 2)
self is a scene here.
You need this:
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.frame.size.width / 2)
Turn on physics visual representation in your GameViewController like this:
skView.showsPhysics = true
and you will see what is going on.
I am making a custom SKSpriteNode, when I step through calling createShip the heroShip constant in the class is correct, but when I jump back to the gameScene, the heroShip constant there does not have the properties I assigned when calling createShip, I am not sure what I am doing wrong. I have tried using class function but that doesn't work using the height and width properties.
Custom SKSpriteNode class
class hero: SKSpriteNode {
var width: CGFloat = 0.0
var height: CGFloat = 0.0
func createShip() -> SKSpriteNode {
let heroShip = SKSpriteNode(imageNamed: "heroShip")
heroShip.anchorPoint = CGPointMake(1.0, 0.5)
heroShip.physicsBody = SKPhysicsBody(rectangleOfSize: heroShip.size)
heroShip.physicsBody?.usesPreciseCollisionDetection = true
heroShip.zPosition = 1.0
heroShip.physicsBody?.mass = 0.02
heroShip.physicsBody?.dynamic = true
heroShip.physicsBody?.affectedByGravity = false
heroShip.physicsBody?.categoryBitMask = ObjectCategory.collisionHeroCategory.rawValue
heroShip.physicsBody?.contactTestBitMask = ObjectCategory.sceneCategory.rawValue
heroShip.physicsBody?.collisionBitMask = 0x0 | ObjectCategory.sceneCategory.rawValue
//heroShip.position = CGPointMake((scene?.frame.size.width)!/6.0, (scene?.frame.size.height)!/2.0)
heroShip.position = CGPointMake(width, height)
return heroShip
}
}
My GameScene
class GameScene: SKScene,SKPhysicsContactDelegate{
let background = SKSpriteNode(imageNamed: "background")
var score:Int = 0
let scoreLabel = SKLabelNode(fontNamed: "Courier")
let MotionManager = CMMotionManager()
var heroShip = hero()
override func didMoveToView(view: SKView) {
heroShip.width = self.size.width/6.0
heroShip.height = self.size.height/2.0
heroShip.createShip()
let enemyShip = SKSpriteNode(imageNamed: "enemyShip")
/* Setup your scene here */
self.physicsWorld.contactDelegate = self
self.physicsBody = SKPhysicsBody(edgeLoopFromRect: CGRectMake(0,heroShip.size.width/1.25,frame.width,frame.height - heroShip.size.width*1.6))
scene?.physicsBody?.contactTestBitMask = ObjectCategory.sceneCategory.rawValue
scene?.physicsBody?.categoryBitMask = ObjectCategory.sceneCategory.rawValue
background.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame))
scoreLabel.fontColor = SKColor.whiteColor()
scoreLabel.text = String(format: "Score: %01u",score)
scoreLabel.position = CGPointMake(frame.size.width/2, frame.size.height - scoreLabel.frame.size.width/1.2)
scoreLabel.zPosition = 1.0
enemyShip.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
enemyShip.zPosition = 1.0
enemyShip.physicsBody = SKPhysicsBody(rectangleOfSize: heroShip.size)
enemyShip.physicsBody?.usesPreciseCollisionDetection = true
enemyShip.physicsBody?.mass = 0.02
enemyShip.physicsBody?.dynamic = true
enemyShip.physicsBody?.affectedByGravity = false
enemyShip.physicsBody?.categoryBitMask = ObjectCategory.collisionEnemyCategory.rawValue
enemyShip.physicsBody?.contactTestBitMask = ObjectCategory.collisionBulletCategory.rawValue
enemyShip.physicsBody?.collisionBitMask = 0x0
self.addChild(enemyShip)
self.addChild(background)
self.addChild(self.heroShip)
self.addChild(scoreLabel)
if MotionManager.accelerometerAvailable{
MotionManager.startAccelerometerUpdates()
}
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
let bullet = SKSpriteNode(imageNamed: "bullet")
bullet.position = CGPointMake(heroShip.position.x, heroShip.position.y)
bullet.zPosition = 1.0
// Add physics body for collision detection
bullet.physicsBody = SKPhysicsBody(rectangleOfSize: bullet.frame.size)
bullet.physicsBody?.dynamic = true
bullet.physicsBody?.affectedByGravity = false
bullet.physicsBody?.categoryBitMask = ObjectCategory.collisionBulletCategory.rawValue
bullet.physicsBody?.contactTestBitMask = ObjectCategory.collisionHeroCategory.rawValue
bullet.physicsBody?.collisionBitMask = 0x0;
let action = SKAction.moveToX(CGRectGetMaxX(self.frame) + bullet.size.width, duration: 0.75)
self.addChild(bullet)
bullet.runAction(action, completion: {
bullet.removeAllActions()
bullet.removeFromParent()
})
}
func didBeginContact(contact: SKPhysicsContact) {
if contact.bodyB.categoryBitMask == ObjectCategory.collisionBulletCategory.rawValue && contact.bodyA.categoryBitMask == ObjectCategory.collisionEnemyCategory.rawValue{
score++
}
}
override func update(currentTime: CFTimeInterval) {
let data = MotionManager.accelerometerData
if data?.acceleration.x == nil{
print("nil")
}
else if fabs((data?.acceleration.x)!) > 0.2 {
heroShip.physicsBody?.applyForce(CGVectorMake(0.0, CGFloat(40 * (data?.acceleration.x)!)))
}
scoreLabel.text = String(format: "Score: %01u",score)
}
}
You run
heroShip.createShip()
and then never do anything with the SKSpriteNode that is returned. From what I can tell, the hero class is the hero ship. I am going off of this assumption for the rest of this answer.
Going from the top of the GameScene, you should do some refactoring.
var heroShip = hero() Is going to be replaced to init using the SKSpriteNode structure:
var heroShip = hero(imageNamed: "heroShip")
Moving to hero class, func createShip() -> SKSpriteNode { should be turned into func createShip() {. As you already have the node set up with the image texture now, and are using the hero class as the node, there is no need to return a SKSpriteNode.
Delete let heroShip = SKSpriteNode(imageNamed: "heroShip") as the hero class is going to be our heroShip.
Replace any usage of the heroShip.whatever variable with self.whatever. At the end, delete the return heroShip.
You seem to not be understanding what is happening with your code.
As of right now createShip() is creating a hero ship, but you never use it.
By looking at your code, it seems like createShip() is not even needed. From looking at it, hero IS heroShip, so do the code in your init.
convenience init(imageNamed: String,sceneSize:CGSize) {
let heroTexture = SKTexture(imageNamed: imageNamed)
self.init(texture: heroTexture, color: UIColor.whiteColor(), size: heroTexture.size()) //This may need to be tweeked, my mac is dead right now to verify.
self.anchorPoint = CGPointMake(1.0, 0.5)
self.physicsBody = SKPhysicsBody(rectangleOfSize: self.size)
self.physicsBody?.usesPreciseCollisionDetection = true
self.zPosition = 1.0
self.physicsBody?.mass = 0.02
self.physicsBody?.dynamic = true
self.physicsBody?.affectedByGravity = false
heroShip.physicsBody?.categoryBitMask = ObjectCategory.collisionHeroCategory.rawValue
heroShip.physicsBody?.contactTestBitMask = ObjectCategory.sceneCategory.rawValue
heroShip.physicsBody?.collisionBitMask = 0x0 | ObjectCategory.sceneCategory.rawValue
//self.position = CGPointMake((scene?.frame.size.width)!/6.0, (scene?.frame.size.height)!/2.0)
self.position = CGPointMake(sceneSize.width, sceneSize.height)
}
You now come across another problem, and that is your SKPhysicsBody will not align to your anchor point.
To fix this, create the SKPhysicsBody like this:
let centerPoint = CGPointMake(self.size.width / 2 - (self.size.width * self.anchorPoint.x), self.size.height / 2 - (self.size.height * self.anchorPoint.y))
self.physicsBody = SKPhysicsBody(rectangleOfSize: self.size, center: centerPoint)
I have created a simple project but I have a problem in the collisions.
It's simple (ball moving and vertical line) but didn't figure out how to stop the ball if it is touched the line.
import SpriteKit
class GameScene: SKScene,SKPhysicsContactDelegate {
var rPipe = SKSpriteNode() // Left Pipe
var ball1 = SKSpriteNode() // Ball
enum ColliderType:UInt32 {
case Ball1 = 1
case Pipe = 2
}
override func didMoveToView(view: SKView) {
self.physicsWorld.contactDelegate = self
// Pipe
let rPipeTexture = SKTexture(imageNamed: "pipe_r.png")
rPipe = SKSpriteNode(texture: rPipeTexture)
rPipe.position = CGPoint(x: CGRectGetMaxX(self.frame)-50, y: CGRectGetMidY(self.frame)-30)
rPipe.physicsBody = SKPhysicsBody(rectangleOfSize: rPipeTexture.size())
rPipe.physicsBody?.dynamic = false
rPipe.physicsBody?.categoryBitMask = ColliderType.Pipe.rawValue
rPipe.physicsBody?.contactTestBitMask = ColliderType.Pipe.rawValue
rPipe.physicsBody?.collisionBitMask = ColliderType.Pipe.rawValue
self.addChild(rPipe)
// Ball
let ballTexture = SKTexture(imageNamed: "gBall.png")
ball1 = SKSpriteNode(texture: ballTexture)
ball1.position = CGPoint(x: CGRectGetMinX(self.frame)+675, y: CGRectGetMaxY(self.frame)-220)
ball1.physicsBody = SKPhysicsBody(circleOfRadius: ballTexture.size().height/2)
ball1.physicsBody?.dynamic = false
ball1.physicsBody?.categoryBitMask = ColliderType.Ball1.rawValue
ball1.physicsBody?.contactTestBitMask = ColliderType.Pipe.rawValue
ball1.physicsBody?.collisionBitMask = ColliderType.Pipe.rawValue
self.addChild(ball1)
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch in (touches ) {
let location = touch.locationInNode(self)
if ball1.containsPoint(location) {
ball1.position.x = location.x
}
}
}
func didBeginContact(contact: SKPhysicsContact) {
print("Contact")
}
One of your collided objects's dynamic property should be set to true. Otherwise the collision will be ignored. After setting dynamic, you also need to set affectedByGravity to false because the ball should not be affected by the gravity.
ball1.physicsBody?.dynamic = true
ball1.physicsBody?.affectedByGravity = false
I want to move a SKSpriteNode on the Y-Axis. The SKSpriteNode called Player has no Velocity.The Player can only jump if a Platform is in contact.
Everytime the Screen is touched, I want to give the Player an impulse with a minimum impulse or a maximum impulse
If the Screen is tapped shortly, the Minimum impulse should be e.g. y = 50.
If the Screen is hold, that means the finger is on the Screen long, the Maximum should be e.g. y = 100.
But the Player should be also able to jump between the Minimum and Maximum height, if for e.g. the Screen is not long but also not shortly pressed, the Player should only get an impulse of y = 70.
If the Screen is hold, the Player should jump to his max height, fall down, and if it is in contact with the Platform again, it should jump, because you still hold the Screen.
I have already tried this with the suggested answer in this Thread:StackOverFlow
But this does not give the Minimum jump, also no Press jump.
For clarity: The impulse should not be after the tap is done, but while it is tapped. The longer you hold, the longer the jump is.
import SpriteKit
import GameKit
struct Constants {
static let minimumJumpForce:CGFloat = 40.0
static let maximumJumpForce:CGFloat = 60.0
static let characterSideSpeed:CGFloat = 18.0
}
class GameScene: SKScene, SKPhysicsContactDelegate {
var Player: SKSpriteNode!
var Platform0: SKSpriteNode!
var World: SKNode!
var Camera: SKNode!
var force: CGFloat = 40.0
var pressed = false
var isCharacterOnGround = false
.....
func SpawnPlatforms() {
Platform0 = SKSpriteNode (color: SKColor.greenColor(), size: CGSize(width: self.frame.size.width , height: 25))
Platform0.position = CGPoint(x: self.frame.size.width / 2, y: -36)
Platform0.zPosition = 1
Platform0.physicsBody = SKPhysicsBody(rectangleOfSize:Platform0.size)
Platform0.physicsBody?.dynamic = false
Platform0.physicsBody?.allowsRotation = false
Platform0.physicsBody?.restitution = 0
Platform0.physicsBody?.usesPreciseCollisionDetection = true
Platform0.physicsBody?.categoryBitMask = Platform0Category
Platform0.physicsBody?.collisionBitMask = PlayerCategory
Platform0.physicsBody?.contactTestBitMask = PlayerCategory
World.addChild(Platform0)
}
func SpawnPlayer(){
Player = SKSpriteNode (imageNamed: "Image.png")
Player.size = CGSize(width: 64, height: 64)
Player.position = CGPoint(x: self.frame.size.width / 2, y: 0)
Player.zPosition = 2
Player.physicsBody = SKPhysicsBody(rectangleOfSize:CGSize(width: 35, height: 50))
Player.physicsBody?.dynamic = true
Player.physicsBody?.allowsRotation = false
Player.physicsBody?.restitution = 0.1
Player.physicsBody?.usesPreciseCollisionDetection = true
Player.physicsBody?.categoryBitMask = PlayerCategory
Player.physicsBody?.collisionBitMask = Platform0Category
Player.physicsBody?.contactTestBitMask = Platform0Category | Platform1Category | Platform2Category | Platform3Category | Platform4Category | Platform5Category
World.addChild(Player)
}
func jump(force : CGFloat){
if(self.isCharacterOnGround){
self.Player.physicsBody?.applyImpulse(CGVectorMake(0, force))
self.isCharacterOnGround = false
}
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
/* Called when a touch begins */
for touch in (touches as! Set<UITouch>) {
let location = touch.locationInNode(self)
self.pressed = true
let timerAction = SKAction.waitForDuration(0.0)
let update = SKAction.runBlock({
if(self.force < Constants.maximumJumpForce){
self.force += 2.0
}else{
self.jump(Constants.maximumJumpForce)
self.force = Constants.maximumJumpForce
}
})
let sequence = SKAction.sequence([timerAction, update])
let repeat = SKAction.repeatActionForever(sequence)
self.runAction(repeat, withKey:"repeatAction")
}
}
override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
for touch in (touches as! Set<UITouch>) {
let location = touch.locationInNode(self)
self.removeActionForKey("repeatAction")
self.jump(self.force)
self.force = Constants.minimumJumpForce
self.pressed = false
}
}
func didBeginContact(contact: SKPhysicsContact) {
//this gets called automatically when two objects begin contact with each other
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch(contactMask) {
case PlayerCategory | Platform0Category:
//either the contactMask was the bro type or the ground type
println("Contact Made0")
Green = true
self.isCharacterOnGround = true
default:
return
}
}
Here is an working example on how to make something like:
long pressed jump based on duration of press
short (one tap jump)
restrict character to jump while in the air
keep character jumping while finger is on screen
Code (Swift 4.x)
import SpriteKit
struct Constants {
static let minimumJumpForce:CGFloat = 15.0
static let maximumJumpForce:CGFloat = 30.0
static let characterSideSpeed:CGFloat = 18.0
}
class GameScene: SKScene,SKPhysicsContactDelegate
{
let CharacterCategory : UInt32 = 0x1 << 1
let PlatformCategory : UInt32 = 0x1 << 2
let WallCategory : UInt32 = 0x1 << 3
var force: CGFloat = 16.0 //Initial force
var pressed = false
var isCharacterOnGround = false // Use this to prevent jumping while in the air
let character = SKSpriteNode(color: .green, size: CGSize(width: 30, height:30))
let debugLabel = SKLabelNode(fontNamed: "Geneva")
override func didMove(to view: SKView)
{
//Setup contact delegate so we can use didBeginContact and didEndContact methods
physicsWorld.contactDelegate = self
physicsWorld.speed = 0.5
//Setup borders so character can't escape from us :-)
self.physicsBody = SKPhysicsBody(edgeLoopFrom: self.frame)
self.physicsBody?.categoryBitMask = WallCategory
self.physicsBody?.collisionBitMask = CharacterCategory
//Setup character
character.position = CGPoint(x: 150, y: 150)
character.physicsBody = SKPhysicsBody(rectangleOf: character.size)
character.physicsBody?.categoryBitMask = CharacterCategory
character.physicsBody?.contactTestBitMask = PlatformCategory
character.physicsBody?.collisionBitMask = PlatformCategory | WallCategory
character.physicsBody?.allowsRotation = false
character.physicsBody?.isDynamic = true
character.physicsBody?.restitution = 0.1
self.addChild(character)
generatePlatforms()
debugLabel.text = " DEBUG: "
debugLabel.fontColor = .white
debugLabel.fontSize = 12.0
debugLabel.position = CGPoint(x: frame.midX, y: frame.midY+100)
self.addChild(debugLabel)
}
func generatePlatforms(){
for i in 1...4
{
let position = CGPoint(x: frame.midX, y: CGFloat(i)*140.0 - 100)
let platform = createPlatformAtPosition(position: position)
self.addChild(platform)
}
}
func createPlatformAtPosition(position : CGPoint)->SKSpriteNode{
let platform = SKSpriteNode(color: .green, size: CGSize(width: frame.size.width, height:20))
platform.position = position
platform.physicsBody = SKPhysicsBody(
edgeFrom: CGPoint(x: -platform.size.width/2.0, y:platform.size.height/2.0),
to:CGPoint(x: platform.size.width/2.0, y: platform.size.height/2.0))
platform.physicsBody?.categoryBitMask = PlatformCategory
platform.physicsBody?.contactTestBitMask = CharacterCategory
platform.physicsBody?.collisionBitMask = CharacterCategory
platform.physicsBody?.allowsRotation = false
platform.name = "platform"
platform.physicsBody?.isDynamic = false
platform.physicsBody?.restitution = 0.0
return platform
}
func jump(force : CGFloat){
if(self.isCharacterOnGround){
self.character.physicsBody?.applyImpulse(CGVector(dx: 0, dy: force))
self.character.physicsBody?.collisionBitMask = WallCategory
self.isCharacterOnGround = false
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.pressed = true
let timerAction = SKAction.wait(forDuration: 0.05)
let update = SKAction.run({
if(self.force < Constants.maximumJumpForce){
self.force += 2.0
}else{
self.jump(force: Constants.maximumJumpForce)
self.force = Constants.maximumJumpForce
}
})
let sequence = SKAction.sequence([timerAction, update])
let repeat_seq = SKAction.repeatForever(sequence)
self.run(repeat_seq, withKey:"repeatAction")
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.removeAction(forKey: "repeatAction")
self.jump(force: self.force)
self.force = Constants.minimumJumpForce
self.pressed = false
}
override func update(_ currentTime: TimeInterval) {
debugLabel.text = "DEBUG: onTheGround : \(isCharacterOnGround), force \(force)"
if(character.position.x <= character.size.width/2.0 + 5.0 && character.physicsBody!.velocity.dx < 0.0 ){
character.physicsBody?.applyForce(CGVector(dx: Constants.characterSideSpeed, dy: 0.0))
}else if((character.position.x >= self.frame.size.width - character.size.width/2.0 - 5.0) && character.physicsBody!.velocity.dx >= 0.0){
character.physicsBody?.applyForce(CGVector(dx: -Constants.characterSideSpeed, dy: 0.0))
}else if(character.physicsBody!.velocity.dx > 0.0){
character.physicsBody!.applyForce(CGVector(dx: Constants.characterSideSpeed, dy: 0.0))
}else{
character.physicsBody!.applyForce(CGVector(dx: -Constants.characterSideSpeed, dy: 0.0))
}
}
func didBegin(_ 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 & CharacterCategory) != 0 &&
(secondBody.categoryBitMask & PlatformCategory != 0)) {
let platform = secondBody.node! as! SKSpriteNode
// platform.color = UIColor.redColor()
let platformSurfaceYPos = platform.position.y + platform.size.height/2.0
let player = contact.bodyB.node! as! SKSpriteNode
let playerLegsYPos = player.position.y - player.size.height/2.0
if((platformSurfaceYPos <= playerLegsYPos)){
character.physicsBody?.collisionBitMask = PlatformCategory | WallCategory
self.isCharacterOnGround = true
if(self.pressed){
let characterDx = character.physicsBody?.velocity.dx
character.physicsBody?.velocity = CGVector(dx: characterDx!, dy: 0.0)
self.jump(force: Constants.maximumJumpForce)
}
}
}
}
func didEnd(_ 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 & CharacterCategory) != 0 &&
(secondBody.categoryBitMask & PlatformCategory != 0)) {
let platform = secondBody.node as! SKSpriteNode
let platformSurfaceYPos = platform.position.y + platform.size.height/2.0
let player = contact.bodyB.node as! SKSpriteNode
let playerLegsYPos = player.position.y - player.size.height/2.0
if((platformSurfaceYPos <= playerLegsYPos) && ((character.physicsBody?.velocity.dy)! > CGFloat(0.0))){
character.physicsBody?.collisionBitMask = WallCategory
self.isCharacterOnGround = false
}
}
}
}
Note that this is simple example, and in real application you will probably have to handle states like isOnTheGround in a different way. Right now, to determine if character is on the ground you just set isOnTheGround = true when character make a contact with platform, and set it to false in didEndContact...But there are situations when character can be in contact with platform while in the air (eg. side contact)...
EDIT:
I changed the code to let the player jump while pressed. Here is the result:
Important:
Actual platform implementation and contact handling is up to you and this is not tested. The only purpose of this example is to show you how to jump while pressed. Currently, physicsWorld.speed is set to 0.5 to make animation slower because its easier to debug like that, but you can change this to default value (1.0).
So, as you can see from the image, while player is on the first platform some small jumps are presented (by simple tapping, or short pressing). Then (player is still on first platform) long press has been made, and player has jumped on second platform. After that, another long press is done, but this time without releasing, and player starts jumping from one platform to another using maximum force.
This needs a lot of tweaking and proper platform & contact detection, but it can give you an idea about how to implement jumping you asked about.
I am creating my first game with Sprite Kit. It is a Flappy Bird type game. The image on the left is what the game looked like earlier today. I ended up creating an entirely new project. I copied the code for the previous project and pasted it into the current one. I placed the same exact images as the previous project into the current one as well. There are no compiling errors and everything works the same except that the game now looks like the image on the right. As you can see the images widths are smaller. Any advice would be greatly appreciated, if you would like me to provide all of the code in this question let me know, thank you.
This is all of the code for the Archery Scene:
//
// ArcheryScene.swift
// FlappyBird (swift)
//
// Created by Brandon Ballard on 1/6/15.
// Copyright (c) 2015 Brandon Ballard. All rights reserved.
//
import UIKit
import SpriteKit
class ArcheryScene: SKScene, SKPhysicsContactDelegate {
var bird = SKSpriteNode()
var pipeUpTexture = SKTexture()
var pipeDownTexture = SKTexture()
var pipesMoveAndRemove = SKAction()
var score = 0
let pipeGap = 150.0
enum ColliderType:UInt32 {
case BIRD = 1
case PIPE = 2
}
override func didMoveToView(view: SKView) {
/* Setup your scene here */
backgroundColor = SKColor.cyanColor()
//physics
self.physicsWorld.gravity = CGVectorMake(0.0, -15.0);
self.physicsWorld.contactDelegate = self
//Bird
var birdTexture = SKTexture(imageNamed:"Bird")
birdTexture.filteringMode = SKTextureFilteringMode.Nearest
bird = SKSpriteNode(texture: birdTexture)
bird.setScale(0.6)
bird.position = CGPoint(x: self.frame.width * 0.35 + 20, y: self.frame.size.height * 0.95)
bird.physicsBody = SKPhysicsBody(circleOfRadius: bird.size.height / 2.0)
bird.physicsBody?.dynamic = true
bird.physicsBody?.allowsRotation = true
bird.physicsBody?.affectedByGravity = true
bird.physicsBody!.collisionBitMask = ColliderType.BIRD.rawValue
bird.physicsBody!.contactTestBitMask = ColliderType.PIPE.rawValue
self.addChild(bird)
//Ground
var groundTexture = SKTexture(imageNamed: "Ground")
var sprite = SKSpriteNode(texture: groundTexture)
sprite.setScale(2.0)
sprite.position = CGPointMake(self.size.width / 2, sprite.size.height / 2.0)
self.addChild(sprite)
var ground = SKNode()
ground.position = CGPointMake(0, groundTexture.size().height + 0)
ground.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(self.frame.size.width, groundTexture.size().height * 2.0))
ground.physicsBody?.dynamic = false
self.addChild(ground)
//Pipes
//Create the Pipes
pipeUpTexture = SKTexture(imageNamed: "PipeUp")
pipeDownTexture = SKTexture(imageNamed: "PipeDown")
//Movement of Pipes
let distanceToMove = CGFloat(self.frame.size.width + 2.0 * pipeUpTexture.size().width)
let movePipes = SKAction.moveByX(-distanceToMove, y: 0.0, duration: NSTimeInterval(0.01 * distanceToMove))
let removePipes = SKAction.removeFromParent()
pipesMoveAndRemove = SKAction.sequence([movePipes,removePipes])
//Spawn Pipes
let spawn = SKAction.runBlock({() in self.spawnPipes()})
let delay = SKAction.waitForDuration(NSTimeInterval(2.0))
let spawnThenDelay = SKAction.sequence([spawn,delay])
let spawnThenDelayForever = SKAction.repeatActionForever(spawnThenDelay)
self.runAction(spawnThenDelayForever)
}
func spawnPipes() {
let pipePair = SKNode()
pipePair.position = CGPointMake(self.frame.size.width + pipeUpTexture.size().width * 2, 0)
pipePair.zPosition = -10
let height = UInt32(self.frame.size.height / 4)
let y = arc4random() % height + height
var pipeDown = SKSpriteNode(texture: pipeDownTexture)
pipeDown.setScale(2.0)////////
pipeDown.position = CGPointMake(3.0, CGFloat(y) + pipeDown.size.height + CGFloat(pipeGap) )
pipeDown.physicsBody = SKPhysicsBody(rectangleOfSize: pipeDown.size)
pipeDown.physicsBody?.dynamic = false
pipeDown.physicsBody!.affectedByGravity = false
pipeDown.physicsBody!.collisionBitMask = ColliderType.PIPE.rawValue
pipePair.addChild(pipeDown)
var pipeUp = SKSpriteNode(texture: pipeUpTexture)
pipeUp.setScale(2.0)
pipeUp.position = CGPointMake(0.0, CGFloat(y))
pipeUp.physicsBody = SKPhysicsBody(rectangleOfSize: pipeUp.size )
pipeUp.physicsBody?.dynamic = false
pipeUp.physicsBody!.affectedByGravity = false
pipeUp.physicsBody!.collisionBitMask = ColliderType.PIPE.rawValue
pipePair.addChild(pipeUp)
pipePair.runAction(pipesMoveAndRemove)
self.addChild(pipePair)
}
func didBeginContact(contact: SKPhysicsContactDelegate) {
scene?.view?.paused = true
//gameOver()
}
func createScoreNode() -> SKLabelNode {
let scoreNode = SKLabelNode(fontNamed: "Brandon Ballard")
scoreNode.name = "scoreNode"
let newScore = "\(score)"
scoreNode.text = newScore
scoreNode.fontSize = 125
scoreNode.fontColor = SKColor.cyanColor()
scoreNode.position = CGPointMake(CGRectGetMidX(self.frame), 58)
self.addChild(scoreNode)
return scoreNode
}
func gameOver() {
let scoreNode = self.createScoreNode()
self.addChild(scoreNode)
let fadeOut = SKAction.sequence([SKAction.waitForDuration(3.0), SKAction.fadeOutWithDuration(3.0)])
let welcomeReturn = SKAction.runBlock({
let transition = SKTransition.revealWithDirection(SKTransitionDirection.Down, duration: 1.0)
let welcomeScene = GameScene(fileNamed: "GameScene")
self.scene!.view?.presentScene(welcomeScene, transition: transition)
})
let sequence = SKAction.sequence([fadeOut, welcomeReturn])
self.runAction(sequence)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
bird.physicsBody?.velocity = CGVectorMake( 0, 0 )
bird.physicsBody?.applyImpulse(CGVectorMake(0,25))
}
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}
All I needed to do to fix my problem was add a simple line of code to my GameScene file. Here is the code I had in the GameScene file before I solved the problem that presents the ArcheryScene:
welcomeNode?.runAction(fadeAway, completion: {
let doors = SKTransition.pushWithDirection(SKTransitionDirection.Down, duration: 1.0)
let archeryScene = ArcheryScene(fileNamed: "ArcheryScene")
self.view?.presentScene(archeryScene, transition: doors)
})
All I had to do was add this line of code after I created "archeryScene":
archeryScene.scaleMode = .AspectFill
This made the images "fit to screen size". The exact description of ".AspectFill" used by Apple is:
"The scaling factor of each dimension is calculated and the larger of the two is chosen. Each axis of the scene is scaled by the same scaling factor. This guarantees that the entire area of the view is filled but may cause parts of the scene to be cropped."