Created
September 10, 2020 20:17
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| private func change(location: CGPoint) { | |
| // creating vector from location point | |
| let vector = CGVector(dx: location.x, dy: location.y) | |
| // geting angle in radian need to subtract the knob radius and padding | |
| let angle = atan2(vector.dy - (config.knobRadius + 10), vector.dx - (config.knobRadius + 10)) + .pi/2.0 | |
| // convert angle range from (-pi to pi) to (0 to 2pi) | |
| let fixedAngle = angle < 0.0 ? angle + 2.0 * .pi : angle | |
| // convert angle value to temperature value | |
| let value = fixedAngle / (2.0 * .pi) * config.totalValue | |
| if value >= config.minimumValue && value <= config.maximumValue { | |
| temperatureValue = value | |
| angleValue = fixedAngle * 180 / .pi // converting to degree | |
| } | |
| } |
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