SKEmitterNode not removing itself from parent?
I added SKEmitterNode as childNode of my mainScene and expected it to be removed when particleLifetime
finished, described as apple docs .
Added such emitters,
var emitterPath : String = NSBundle.mainBundle().pathForResource("ShipFire", ofType: "sks")!
var emitter : SKEmitterNode = NSKeyedUnarchiver.unarchiveObjectWithFile(emitterPath) as! SKEmitterNode
emitter.position = position
emitter.particleLifetime = 0.1;
self.addChild(emitter)
My SKEmitterNode properties like below image
When I run it, the emitters are not removed from the screen.
I do not know what to add more, if you need more information please ask for help please rate.
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particleLifetime defines the average particle lifetime in seconds. This does not affect the removal of the SKEmitterNode from the parent.
numOfParticlesToEmit , which refers to the Maximum Field field in the Particles Editor's Particles, determines the number of particles that the emitter should emit before stopping. This does not affect the removal of the SKEmitterNode from the parent. Also note that you have set this field to 0, which will allow infinite radiation.
So, if you want to remove a node from the parent when the emitter is done with emitting, you can set the number of particles to emit (the "Maximum in the area of particles inside the editor" field) and run the SKAction sequence which will be:
- start the emitter
- wait a while
- and remove the emitter from the parent (at which point the emitter should finish emitting)
Here's a simple example showing how to do this using the SKAction sequence:
class GameScene: SKScene {
let emitter : SKEmitterNode = NSKeyedUnarchiver.unarchiveObjectWithFile(NSBundle.mainBundle().pathForResource("MyParticle", ofType: "sks")!) as SKEmitterNode
override func didMoveToView(view: SKView) {
self.backgroundColor = SKColor.blackColor()
}
func addEmitter(position:CGPoint){
var emitterToAdd = emitter.copy() as SKEmitterNode
emitterToAdd.position = position
let addEmitterAction = SKAction.runBlock({self.addChild(emitterToAdd)})
var emitterDuration = CGFloat(emitter.numParticlesToEmit) * emitter.particleLifetime
let wait = SKAction.waitForDuration(NSTimeInterval(emitterDuration))
let remove = SKAction.runBlock({emitterToAdd.removeFromParent(); println("Emitter removed")})
let sequence = SKAction.sequence([addEmitterAction, wait, remove])
self.runAction(sequence)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let touch: AnyObject? = touches.anyObject()
let location = touch?.locationInNode(self)
self.addEmitter(location!)
}
}
And here is the result (notice how the node counter changes after the emit is made):
Hope it helps
EDIT:
For those interested in how to make a similar effect as in the video above, try something like this:
The point is to use Color Ramp and select Add for the blend mode.
Below is the link to the .sks file: Effect.sks
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