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I am trying to make an application for the Vision Pro where the particles don't move but rather stay still so that there is no lag. For example I am trying to spawn in a 100 particles here:
I want the particles to remain static but spawning in many causes the simulator to lag. Also is there maybe a way i can get a particle system to follow a specific shape like the one i have in the image.
Currently, I have multiple model entities that take on a particle system component
for i in 0..<100 {
let newEntity = ModelEntity()
var particleSystem = particleSystem(color: newColor)
newEntity.components.set(particleSystem)
newEntity.position = position
newEntity.scale = scale
stars.append(newEntity)
}
}
func particleSystem(color: UIColor) -> ParticleEmitterComponent {
var particles = ParticleEmitterComponent()
particles.emitterShapeSize = .init(repeating: 0.02)
// make burst smaller
particles.emitterShape = .sphere
particles.mainEmitter.birthRate = 1
particles.mainEmitter.lifeSpan = 2
particles.mainEmitter.size = 0.02
particles.burstCount = 50
particles.speed = 0.01
particles.mainEmitter.isLightingEnabled = false
particles.mainEmitter.color = .constant(.single(color))
return particles
}
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An SCNNode is created and used for either an SCNView or an SKView.
SceneKit and SpriteKit are using default values.
The SceneView has an SCNScene with a rootNode of the SCNNode.
The SpriteKitView has a SpriteKitScene with an SK3DNode that has an SCNScene with a rootNode of the SCNNode.
There is no other code changing or adding values.
Why are the colors for the SCNView less vibrant than the colors for the SKView?
Is there a default to change to make them equivalent, or another value to add? I have tried changing the default SCNMaterial but only succeeded in making the image black or dark.
Any help is appreciated.
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How do I change a UIBezierPath.currentPoint to a SKSpriteNode.position?
Here are the appropriate code snippets:
func createTrainPath() {
let startX = -tracksWidth/2,
startY = tracksPosY
savedTrainPosition = CGPoint(x: startX, y: startY!)
trackRect = CGRect(x: savedTrainPosition.x,
y: savedTrainPosition.y,
width: tracksWidth,
height: tracksHeight)
trainPath = UIBezierPath(ovalIn: trackRect)
trainPath = trainPath.reversing() // makes myTrain move CW
} // createTrainPath
Followed by:
func startFollowTrainPath() {
let theSpeed = Double(5*thisSpeed)
var trainAction = SKAction.follow(
trainPath.cgPath,
asOffset: false,
orientToPath: true,
speed: theSpeed)
trainAction = SKAction.repeatForever(trainAction)
createPivotNodeFor(myTrain)
myTrain.run(trainAction, withKey: runTrainKey)
} // startFollowTrainPath
So far, so good (I think?) ...
Within other places in my code, I call:
return trainPath.currentPoint
I need to convert trainPath.currentPoint to myTrain.position ...
When I insert the appropriate print statements, I see for example:
myTrain.position = (0.0, -295.05999755859375)
trainPath.currentPoint = (392.0, -385.0)
which obviously disqualifies a simple = , as in:
myTrain.position = trainPath.currentPoint
Since this = is not correct, what is ?
After more investigation, my guess is that .currentPoint is in SKSpriteNode coordinates and .position is in SKScene coordinates.
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I'm trying to integrate AR into my app, and I want to be able to present a the UIViewController containing the ar view after pressing a sprite in SKScene. I'm trying to look for a way to present this view controller in touchesBegan however I'm not able to find any reference on this.
I'd really appreciate any help.
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I am using the following code to create a texture atlas at runtime using a single .png image sprite sheet:
func createSpriteTextureAtlas(atlasNumber atlas:Int, forWorld world:Int) {
//load the png file
let image = UIImage(named: "world\(world)_spritesheet\(atlas)_2048x2048.png")
//create the dictonary
var imageDictionary = [String: UIImage]()
//iterate through all rows and columns and get the subimage
var imageIndex = 0
for row in 0...7 {
for column in 0...7 {
let sourceRect = CGRect(x:column * 256, y:row * 256, width:256, height:256)
let sourceImage = image?.cgImage!.cropping(to: sourceRect)
let subImage = UIImage(cgImage: sourceImage!)
//add the sub image and name to the dictionary
imageDictionary["\(imageIndex)"] = subImage
imageIndex = imageIndex + 1
}
}
//create the texture atlas using the dictionary
spriteTextureAtlas[atlas] = SKTextureAtlas(dictionary: imageDictionary)
}
I have a different sprite sheet for every world. I made all the sprite sheets myself using the same tool. This code works 100% of the time for most images.
For some images however, the program crashes at: SKTextureAtlas(dictionary: imageDictionary) with the error: Thread 4: EXC_BAD_ACCESS (code=1, address=0x105ff2000). The stack trace says it is crashing inside: #0 0x00000002178e2d34 in -[SKTextureAtlasPacker isFullyOpaque:] ().
The crash does not happen every time and only happens for some images. The crash never happens on the simulator.
Did I make a mistake inside createSpriteTextureAtlas or is this a SpriteKit bug?
P.S. I already know that I can let Xcode make the texture atlas for me by using a folder with a .atlas extension but this is not what i want to do.
We have a 2023 Mac mini with an Apple M2 Pro chip. The Mac has two displays connected. If a SpriteKit application has two windows on separate desktops, one of the windows can’t run animations.
You can easily replicate this issue with the following steps:
Create a new macOS project in Xcode.
Select the sample Game project with SpriteKit as the technology.
Edit the fade duration in GameScene.swift to make the animated nodes live longer (e.g. 15 seconds).
In AppDelegate.applicationDidFinishLaunching, add code to instantiate a second window:
let mainStoryboard = NSStoryboard.init(name: NSStoryboard.Name("Main"), bundle: nil)
if let newWindow = mainStoryboard.instantiateInitialController() as? NSWindowController {
newWindow.showWindow(self)
}
Run the app. If both windows are on the same desktop, animations run correctly. If the windows are on separate desktops, then animations halt on the 1080p desktop, even though the SKView reports full frame rate.
You can also just check out the sample project from my github repo: https://github.com/lanephillips/SKTest
The issue does not occur if the application is built for Intel processors only and run on Apple Silicon under Rosetta.
We've seen this issue occur in both macOS 13 and 14. I've filed a report through Feedback Assistant, but I'm posting here in case someone else has seen this and has a workaround.
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I'm trying to animate a shape (e.g. a circle) to follow a custom path, and struggling to find the best way of doing this.
I've had a look at the animation options from SwiftUI, UIKit and SpriteKit and all seem very limited in what paths you can provide. Given the complexity of my path, I was hoping there'd be a way of providing a set of coordinates in some input file and have the shape follow that, but maybe that's too ambitious.
I was wondering if this were even possible, and assuming not, if there were other options I could consider.
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I have implemented auto renewable subscriptions in my app, as well as promo codes. Purchase of subscriptions both monthly and annual; work correctly. What I don't know is what to "listen for" instead of product, when the user uses a promo code to purchase the product. am I looking for a different product code? or product identifier when the offer code is used to subscribe?
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Hello everyone
I am porting my existing 2d game writing by spritekit to visionOS
and I am creating a SpriteView in WindowGroup
let currentScene = BattleScene.newGameScene(gameMode: "endless", dataContext: dataController.container.viewContext)
SpriteView(scene: currentScene)
.ignoresSafeArea(.all)
.frame(width: currentScene.frame.width, height: currentScene.frame.height, alignment: .center)
.onReceive(NotificationCenter.default.publisher(for: GameoverNotification)) { _ in
stopAllAudio()
}
.onTapGesture { location in
let viewPosition = location
let touchLocation = CGPoint(x: viewPosition.x, y: viewPosition.y)
print("touch on vision window: ", touchLocation.x, touchLocation.y)
}
.glassBackgroundEffect()
//WindowGameView()
// .environment(\.managedObjectContext, dataController.container.viewContext)
// .environment(model)
// .environment(pressedKeys)
}
.windowStyle(.automatic)
.defaultSize(width: 0.5, height: 1.0, depth: 0.0, in: .meters)
run it and it turns out the scene can't receive tap event.
but it works normal if I run it with my ios target (vision Os designd for ipad)
is there anything I missed?
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Background:
This is a question asking for a good example of SpriteKit from a very new iOS developer who is investigating for starting an iOS 2D game project.
As I explored in the official apple development doc, to dev a 2D game SpriteKit is the very framework I am looking for.
There have been some clear and succinct words for any API and class documented in the reference spec when I started a project in Xcode. However I haven't been able to finish the project as having no any general idea about what is always needed of a typical game using the framework.
Question:
As an experienced Java Spring programmer I believe that I am needed a brief example to get started with the SpriteKit framework which provides me an idea of necessary steps for a 2D game.
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The error shown in the picture appears when I try to link the StartScene.sks file to the code
Attached are pictures of the code
Please help me🙏🏻
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The error shown in the picture appears when I try to link the StartScene.sks file to the code
Attached are pictures of the code
Please help me🙏🏻
Post not yet marked as solved
Hello there 👋
I've noticed a different behavior between iOS 15 and iOS 16 using CIFilter and SpriteKit.
Here is a sample code where I want to display a text and apply a blurry effect on the same text in the back of it.
Here is the expected behavior (iOS 15):
And the broken behavior on iOS 16:
It looks like the text is rotated around the x-axis and way too deep.
Here is the sample code:
import UIKit
import SpriteKit
class ViewController: UIViewController {
var skView: SKView?
var scene: SKScene?
override func viewDidLoad() {
super.viewDidLoad()
skView = SKView(frame: view.frame)
scene = SKScene(size: skView?.bounds.size ?? .zero)
scene?.backgroundColor = UIColor.red
view.addSubview(skView!)
skView!.presentScene(scene)
let neonNode = SKNode()
let glowNode = SKEffectNode()
glowNode.shouldEnableEffects = true
glowNode.shouldRasterize = true
let blurFilter = CIFilter(name: "CIGaussianBlur")
blurFilter?.setValue(20, forKey: kCIInputRadiusKey)
glowNode.filter = blurFilter
glowNode.blendMode = .alpha
let labelNode = SKLabelNode(text: "MOJO")
labelNode.fontName = "HelveticaNeue-Medium"
labelNode.fontSize = 60
let labelNodeCopy = labelNode.copy() as! SKLabelNode
glowNode.addChild(labelNode)
neonNode.addChild(glowNode)
neonNode.addChild(labelNodeCopy)
neonNode.position = CGPoint(x: 200, y: 200)
scene?.addChild(neonNode)
}
}
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I have an unusual situation. I'm working through some self study training and this particular project is a game similar to fruit ninja where things are flying around the screen and you slice through them by swiping your finger. Anyway the instructor provided a series of "*.caf" files for various sounds while playing the game. For some reason I can't hear any of the sounds on my personal Mac when running the app via Xcode to either an iOS iPad simulator or to a real iPad that I have attached to my mac and setup for developer use in Xcode.
Yes sound is working on the mac (hear new email come in etc. and can play videos in the browser).
In the iPad simulator I can play youtube videos in mobile safari. While adjusting the sound doesn't seem to raise or lower the volume I can hear the audio in the youtube videos.
On the real iPad: yes the sound is on and I can hear audio while playing videos in the browser etc.
Lastly, I pushed the code up to GitHub and pulled it to my work Mac. There the sound plays just find in the iOS iPad simulator on that Mac (not allowed to attach my personal iPad to my work mac so can't try the iPad there). So I fell like this confirms the code is correct for playing the sounds in the running app.
Oh, and I can select the file in left nav and click the little play button icon to hear it played in Xcode.
so, I feel like this is an issue on my personal Mac with Xcode etc., but I'm at a loss as to what the issue is. Can anyone suggest some things to look for on my Mac to get sound working in this app?
if you want to see the code it's here and the free training i'm following is at https://www.hackingwithswift.com/100/77.
TIA
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I need to associate sound with the movement of a sprite. Movement can be as a result of physics, not as a result of an SKAction. When the object is sliding thee should be sliding sound throughout the time when it is sliding, and then a different sound when it bumps into a rock and goes up in the air. When the object is airborne, there is no sound, till it falls again - a falling sound, and then slides down with a sliding sound. The sounds associated with the collision ( rock, ground and so on ) are straightforward and work fine. But am having difficulty associating the sound with movement.
The closest result I have is to check the velocity of the sprite's physics body every update cycle and play or stop the sound based on whether the velocity is greater than zero. I tried SKAction.playSoundFileNamed first - the sound kept going even when the object was not moving. I tried adding an SKAudioNode with Play and Stop, with no better result. I finally tried using AVAudioPlayer to play and Pause , which yielded the best results, but the sliding sound still played past the sliding action.
What is the best way to do this?
My code for playing the sound is as follows:
var blockSliding = false
for block in gameBlocks {
if (block.physicsBody?.velocity.dx ?? 0) + (ball.physicsBody?.velocity.dy ?? 0) > 0.05 {
blockSliding = true
break
}
}
if slideSound.isPlaying {
if !blockSliding {
slideSound.pause()
}
} else {
if blockSliding {
slideSound.play()
}
}
I have setup slideSound earlier loading the appropriate sound file into an AVAudioPlayer
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I have a ProRes 4444 format video with an alpha channel.
The circle in the middle of the video is completely opaque, while the rest is fully transparent. Everything looks normal in iMovie, as I can see the background through the surrounding parts.
However, when I play it using AVPlayer, the parts that are supposed to be fully transparent appear somewhat opaque, as shown in the image below:
I used the official project provided by Apple named 'using_hevc_video_with_alpha', but I only replaced the HEVC with alpha format file with a ProRes 4444 format video file. Below is the main code.
import Cocoa
import SpriteKit
import AVFoundation
class ViewController: NSViewController {
@IBOutlet var skView: SKView!
var videoPlayer: AVPlayer!
override func viewDidLoad() {
super.viewDidLoad()
if let view = self.skView {
// Load the SKScene from 'backgroundScene.sks'
guard let scene = SKScene(fileNamed: "backgroundScene") else {
print ("Could not create a background scene")
return
}
// Set the scale mode to scale to fit the window
scene.scaleMode = .aspectFill
// Present the scene
view.presentScene(scene)
// Add the video node
guard let alphaMovieURL = Bundle.main.url(forResource: "xuewang", withExtension: "mov") else {
print("Failed to overlay alpha movie on the background")
return
}
videoPlayer = AVPlayer(url: alphaMovieURL)
let video = SKVideoNode(avPlayer: videoPlayer)
video.size = CGSize(width: view.frame.width, height: view.frame.height)
print( "Video size is %f x %f", video.size.width, video.size.height)
scene.addChild(video)
// Play video
videoPlayer.play()
}
}
}
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All our custom Playground Books using SpriteKit stopped working after upgrading to SwiftPlaygrounds version 4.4
To reproduce the issue, simply create a new book by clicking the top right hand icon and in the book add two lines of code.
import SpriteKit
let circle = SKShapeNode(circleOfRadius: 100.0)
The second line produces an error. I tried with other classes. SKAction seems to work. SKSpriteNode, SKTexture etc have the same issue. Please help. Our students are stuck!
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mac mini 2018, MAC OS Ventura 13.5.2, Xcode 15.0
im running my game app in iPhone SE(3rd gen) device(not simulator) with IOS 17 and getting the following error in console:
[0x159dec540|RoomCongruence::Processor|Processor] One or more of the chosen IR Presets does not contain room congruence data or the data is corrupted.
err shows in console among this other errs messages:
getFilePtr: error -1 getting file status
[Room Congruence] isIrDataUserDataDictionaryStructurallyValid: IRData User Data invalid - underlying CF object is nil.
[0x159dec540|RoomCongruence::Processor|Processor] One or more of the chosen IR Presets does not contain room congruence data or the data is corrupted.
the error is showing only(one time) when user have started a game, but not showing if user select to play again.
app have been tested on IOS 15 and 16 but not showing this error.
appreciate any help, i can provide any other data as necessary. Sorry if im may be missing any info or data necessary this my first time posting here, thanks.
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mac mini 2018, MAC OS Ventura 13.5.2, Xcode 15.0
using SpriteKit
im running my game app in iPhone SE(3rd gen) device(not simulator) with IOS 17 and getting the following error in console:
[Room Congruence] isIrDataUserDataDictionaryStructurallyValid: IRData User Data invalid - underlying CF object is nil.
the error is showing only(one time) when user have started a game, but not showing if user select to play again.
the error is showing among the following console errs:
getFilePtr: error -1 getting file status
[Room Congruence] isIrDataUserDataDictionaryStructurallyValid: IRData User Data invalid - underlying CF object is nil.
[0x159dec540|RoomCongruence::Processor|Processor] One or more of the chosen IR Presets does not contain room congruence data or the data is corrupted.
app have been tested on IOS 15 and 16 but not showing this error.
appreciate any help, i can provide any other data as necessary. Sorry if im may be missing any info or data necessary this my first time posting here, thanks.
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HELLO WORLD!
I am currently developing an amazing Unity mini Game. The game development has come to the deploying stage. Using Unity allows me to deploy this game on MacOS, iOS, Android and Windows which is fantastic . However, I really need this game to have the iOS widget extension as a key feature on mobile. Just like the "Steve" dinosaur game which can be played in widget. I had seen a lot of tutorials and youtube videos but still cant find a solution which make Unity iOS app into a widget. If I really want to make widget Game on iOS, do I need to develop the whole game all over again in xcode or using GameKit? Really hoping there's a way to simply convert the Unity iOS app into a widget.