mwermuth

extension UIBezierPath {
  
  class func getAxisAlignedArrowPoints(inout points: Array<CGPoint>, forLength: CGFloat, tailWidth: CGFloat, headWidth: CGFloat, headLength: CGFloat ) {

    let tailLength = forLength - headLength
    points.append(CGPointMake(0, tailWidth/2))
    points.append(CGPointMake(tailLength, tailWidth/2))
    points.append(CGPointMake(tailLength, headWidth/2))
    points.append(CGPointMake(forLength, 0))
    points.append(CGPointMake(tailLength, -headWidth/2))