Reactor.RCamera.RotateOrbit C# (CSharp) Method

        public void RotateOrbit(float headingDegrees, float pitchDegrees, float rollDegrees)
        {
            float heading = MathHelper.ToRadians(headingDegrees);
            float pitch = MathHelper.ToRadians(pitchDegrees);

            if (preferTargetYAxisOrbiting)
            {
                Quaternion rotation = Quaternion.Identity;

                if (heading != 0.0f)
                {
                    Quaternion.CreateFromAxisAngle(ref targetYAxis, heading, out rotation);
                    Quaternion.Concatenate(ref rotation, ref orientation, out orientation);
                }

                if (pitch != 0.0f)
                {
                    Quaternion.CreateFromAxisAngle(ref WORLD_X_AXIS, pitch, out rotation);
                    Quaternion.Concatenate(ref orientation, ref rotation, out orientation);
                }
            }
            else
            {
                float roll = MathHelper.ToRadians(rollDegrees);
                Quaternion rotation = Quaternion.CreateFromYawPitchRoll(heading, pitch, roll);
                Quaternion.Concatenate(ref orientation, ref rotation, out orientation);
            }
        }