AreaLightTest.AreaLightForm.xyY2XYZ C# (CSharp) Method

        float3    xyY2XYZ( float3 _xyY ) {

                        float       Y_over_y = _xyY.z / _xyY.y;

                                               

                        float3    XYZ;

                        XYZ.x = _xyY.x * Y_over_y;

                        XYZ.y = _xyY.z;

                        XYZ.z = (1.0f - _xyY.x - _xyY.y) * Y_over_y; 

                               

                        return XYZ;

        }