public override void writeTile(int x, int y, int w, int h, Color[] color, float[] alpha)
{
for (int j = 0, index = 0, pixel = 3 * (x + y * width); j < h; j++, pixel += 3 * (width - w))
{
for (int i = 0; i < w; i++, index++, pixel += 3)
{
XYZColor c = Color.NATIVE_SPACE.convertRGBtoXYZ(color[index]);
xyz[pixel + 0] = c.getX();
xyz[pixel + 1] = c.getY();
xyz[pixel + 2] = c.getZ();
}
}
}
private Color getSkyRGB(Vector3 dir)
{
if (dir.z < 0)
{
return(Color.BLACK);
}
if (dir.z < 0.001f)
{
dir.z = 0.001f;
}
dir.normalize();
double theta = Math.Acos(MathUtils.clamp(dir.z, -1, 1));
double gamma = Math.Acos(MathUtils.clamp(Vector3.dot(dir, sunDir), -1, 1));
double x = perezFunction(perezx, theta, gamma, zenithx);
double y = perezFunction(perezy, theta, gamma, zenithy);
double Y = perezFunction(perezY, theta, gamma, zenithY) * 1e-4;
XYZColor c = ChromaticitySpectrum.get((float)x, (float)y);
// XYZColor c = new ChromaticitySpectrum((float) x, (float) y).toXYZ();
float X = (float)(c.getX() * Y / c.getY());
float Z = (float)(c.getZ() * Y / c.getY());
return(RGBSpace.SRGB.convertXYZtoRGB(X, (float)Y, Z));
}
