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jenox/UIGestureRecognizer+Projection.swift Secret

Last active July 9, 2018 13:13
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Projection assuming an exponentially decreasing velocity.
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UIGestureRecognizer+Projection.swift
extension UIGestureRecognizer {
public static func project(_ velocity: CGFloat, onto position: CGFloat, decelerationRate: UIScrollView.DecelerationRate = .normal) -> CGFloat {
let factor = -1 / (1000 * log(decelerationRate.rawValue))
return position + factor * velocity
}
}
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