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| func pointPairToDegrees(from: CGPoint, to: CGPoint) -> Double { | |
| let origin = CGPointMake(to.x - from.x, to.y - from.y) | |
| let bearingRadians = Double(atan2f(Float(origin.y), Float(origin.x))) | |
| let bearingDegrees = bearingRadians * (180 / M_PI) | |
| return modulus(bearingDegrees, modulo: 360) | |
| } | |
| func modulus(number: Double, modulo: Double) -> Double { | |
| var result = number % modulo | |
| if result < 0 { | |
| result += modulo | |
| } | |
| return result | |
| } |
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