private void initHue()
{
float greenRotation = 39.182655f;
if (!hueInitialized)
{
hueInitialized = true;
preHue = new ColorMatrix();
preHue.rotateRed(45);
preHue.rotateGreen(-greenRotation);
float[] lum = new float[] { LUMA_R2, LUMA_G2, LUMA_B2, 1.0f };
preHue.transformVector(lum);
float red = lum[0] / lum[2];
float green = lum[1] / lum[2];
preHue.shearBlue(red, green);
postHue = new ColorMatrix();
postHue.shearBlue(-red, -green);
postHue.rotateGreen(greenRotation);
postHue.rotateRed(-45.0f);
}
}