I essentially want to emit confetti particles. Each particle is the same shape, however, I want each particle to be a random colour from a selection of colors I specify.
Is there a way for each emitted particle to have a random color or do I need a separate emitter for each particle color?
You can use single emitter to achieve what you want:
import SpriteKit
class GameScene: SKScene, SKPhysicsContactDelegate {
let emitter = SKEmitterNode(fileNamed: "particle")
let colors = [SKColor.whiteColor(),SKColor.grayColor(),SKColor.greenColor(),SKColor.redColor(),SKColor.blackColor()]
override func didMoveToView(view: SKView) {
self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
emitter.position = CGPoint(x: 200, y:300)
emitter.particleColorSequence = nil
emitter.particleColorBlendFactor = 1.0
self.addChild(emitter)
let action = SKAction.runBlock({
[unowned self] in
let random = Int(arc4random_uniform(UInt32(self.colors.count)))
self.emitter.particleColor = self.colors[random];
println(random)
})
let wait = SKAction.waitForDuration(0.1)
self.runAction(SKAction.repeatActionForever( SKAction.sequence([action,wait])))
}
}
EDIT:
Try changing duration of wait action to get different results.
You can play with color ramp too (in particle editor) to achieve the same effect:
Or you can use particleColorSequence and SKKeyframeSequence in order to change particle color over its lifetime. Hope this helps.
Just for anyone else who might want an answer to this. There is a framework called SAConfettiView https://github.com/sudeepag/SAConfettiView. Definitely check it out! It worked for me.
