private void ColorPass(float[] eniromentLight, float[] color, float[] normal, float[] p3D, float[] tex,
bool specular, int from)
{
ArrayMath.Sub(_lightPosArray, p3D, _l, 0, from, from, 3);
ArrayMath.Normalize(_l, from, 3);
var dotNl = ArrayMath.Dot(normal, _l, from, from, 3);
ArrayMath.Mul(color, Math.Max(0f, dotNl), _Id, from, from, 3);
ArrayMath.Mul(normal, dotNl * 2, _r, from, from, 3);
ArrayMath.Sub(_r, _l, _r, from, from, from, 3);
ArrayMath.Normalize(_r, from, 3);
ArrayMath.Normalize(p3D, from, 3);
var rDotP3D = -ArrayMath.Dot(_r, p3D, from, from, 3);
var Is = 0f;
if (specular)
{
var max = Math.Max(0, rDotP3D);
Is = DeviceFunction.Pow(max, 50);
}
ArrayMath.Mul(eniromentLight, color, color, 0, from, from, 3);
ArrayMath.Mul(tex, _Id, tex, from, from, from, 3);
ArrayMath.Add(color, tex, color, from, from, from, 3);
ArrayMath.Add(color, Is, color, from, 3);
ArrayMath.Mul(color, 255, color, from, from, 3);
}