AreaLightTest.AreaLightForm.XYZ2xyY C# (CSharp) Method

        float3    XYZ2xyY( float3 _XYZ ) {

                        float3    xyY;

                        xyY.z  = _XYZ.y;

                        xyY.x = _XYZ.x / (_XYZ.x + _XYZ.y + _XYZ.z);

                        xyY.y = _XYZ.y / (_XYZ.x + _XYZ.y + _XYZ.z);

                        return xyY;

        }