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let sprite = self.childNodeWithName("targetSprite") as! SKSpriteNode
let shader = SKShader(fileNamed: "shader1.fsh")
shader.uniforms = [
    SKUniform(name: "u_gradient", texture: SKTexture(imageNamed: "circleshader")),
    SKUniform(name: "u_health", float: 0.75)
]
sprite.shader = shader

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void main() {

    // Find the pixel at the coordinate of the actual texture
    vec4 val = texture2D(u_texture, v_tex_coord);
    
    // If the alpha value of that pixel is 0.0
    if (val.a == 0.0) {
    
        // Turn the pixel green
        gl_FragColor = vec4(0.0,1.0,0.0,1.0);

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let sprite = self.childNodeWithName("targetSprite") as! SKSpriteNode
let shader = SKShader(fileNamed: "shader1.fsh")
sprite.shader = shader

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void main() {
    gl_FragColor = vec4(0.0,1.0,0.0,1.0);
}

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import SpriteKit


class GameData : NSObject, NSCoding {
    
    /// Each scene always knows what scene should come next.
    /// So, by storing the current scene, we can just resume that scene when the game is reloaded
    /// If the user quits on a level, use logic to show world map instead
    /// NOTE** -- save SceneObject instead? so that userData is remembered, and it just pass this to scene manager?
    var currentScene : String = "MainMenu"

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// 5 - starburst out
let filter = CIFilter(name: "CIFlashTransition", withInputParameters: ["inputCenter":CIVector(x: 600, y: 900)])
let transition = SKTransition(CIFilter: filter, duration: 2)

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class GameData : NSObject, NSCoding {
    
    /// Data to save
    
    var variableA : Int = 1
    
    var variableB : Int = 2
        
    var variableC : Int = 3
    

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class CutsceneAction {

    var finishEarly : Bool = false

    func timingFunc(time:Float) -> Float {
        if(self.finishEarly) {
            return 1.0
        }
        else {
            return time

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func timingFunc(time:Float) -> Float {
    return 1.0
}

let moveAction = SKAction.moveToX(500, duration: 0.2)
moveAction.timingFunction = timingFunc

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if let font =  UIFont(name: "DamascusSemiBold", size: 24) {
    
    let textFontAttributes = [
        NSFontAttributeName : font,
        // Note: SKColor.whiteColor().CGColor breaks this
        NSForegroundColorAttributeName: UIColor.whiteColor(),
        NSStrokeColorAttributeName: UIColor.blackColor(),
        // Note: Use negative value here if you want foreground color to show
        NSStrokeWidthAttributeName: -3
    ]