CameraTools.ZoomableCameraBehaviour.CalculateDeltaByPitch C# (CSharp) Method

        private float CalculateDeltaByPitch()
        {
            if (inputDevice.IsDoubleTouching)
                return -inputDevice.NormalizedPinchDeltaThisFrame * (0.1f + currentZoomValue) * pinchSensitivity;
            else
                return 0;
        }