Murkelbox: Animate UVs / Animate Texture for a SpriteAtlas / Flipbook effekt

let spriteatlasanimation = CAKeyframeAnimation()

// We do not directly animate UV´s but a matrix instead that moves the

// UV´s across the texture space

spriteatlasanimation.keyPath = "geometry.firstMaterial.diffuse.contentsTransform"

let pos0 = SCNMatrix4MakeTranslation(0.0, 0.0, 0)

let pos1 = SCNMatrix4MakeTranslation(0.1, 0.1, 0)

let pos2 = SCNMatrix4MakeTranslation(0.2, 0.2, 0)

let pos3 = SCNMatrix4MakeTranslation(0.3, 0.3, 0)

let pos4 = SCNMatrix4MakeTranslation(0.4, 0.4, 0)

let pos5 = SCNMatrix4MakeTranslation(0.5, 0.5, 0)

let pos6 = SCNMatrix4MakeTranslation(0.6, 0.6, 0)

let pos7 = SCNMatrix4MakeTranslation(0.7, 0.7, 0)

let pos8 = SCNMatrix4MakeTranslation(0.8, 0.8, 0)

let pos9 = SCNMatrix4MakeTranslation(0.9, 0.9, 0)

spriteatlasanimation.values = [pos0, pos1, pos2, pos3, pos4, pos5, pos6, pos7, pos8, pos9]

spriteatlasanimation.keyTimes = [0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9]

spriteatlasanimation.duration = 0.5

spriteatlasanimation.isAdditive = false

// No Interpolation required for Flipbook effect : kCAAnimationDiscrete

spriteatlasanimation.calculationMode = kCAAnimationDiscrete

spriteatlasanimation.repeatCount = .infinity

<SCNNODE>.addAnimation(spriteatlasanimation, forKey: "test3")

Murkelbox