public static RgbSpectrum Transform(RgbSpectrum c)
{
float[] xyz = new float[3];
c.XYZ(ref xyz);
var r = ((rWeight[0] * xyz[0] +
rWeight[1] * xyz[1] +
rWeight[2] * xyz[2]));
var g = ((gWeight[0] * xyz[0] +
gWeight[1] * xyz[1] +
gWeight[2] * xyz[2]));
var b = ((bWeight[0] * xyz[0] +
bWeight[1] * xyz[1] +
bWeight[2] * xyz[2]));
return new RgbSpectrum(r, g, b);
}