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import SceneKit
extension SCNNode {
@objc func show(_ show: Bool) {
if show {
unhide()
} else {
hide()
}
}
func hide() {
if opacity == 1.0 {
runAction(SCNAction.fadeOut(duration: 0.5))
}
}
func unhide() {
if opacity == 0.0 {
runAction(SCNAction.fadeIn(duration: 0.5))
}
}
}