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| extension SCNAction { | |
| static func oscillation(amplitude a: CGFloat, timePeriod t: Double) -> SCNAction { | |
| let action = SCNAction.customAction(duration: t) { node, currentTime in | |
| let displacement = a * sin(2 * .pi * currentTime / CGFloat(t)) | |
| node.position.x = Float(displacement) | |
| } | |
| return action | |
| } | |
| } |
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| // This code gets excuted inside of a loop on viewDidLoad() | |
| let osc = SCNAction.oscillation(amplitude: (outerLoopVal % 2 == 0 ? 10 : -10), timePeriod: 240) | |
| nodeRow.runAction(SCNAction.repeatForever(osc)) |
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