private LightColor Specular(Vector3D eyePos, Vector3D pos, Vector3D normal,
Material mate)
{
LightColor ret = new LightColor(0.0D, 0.0D, 0.0D);
if (!type.Equals("AMBIENCE"))
{
Vector3D nml = normal;
Vector3D lv = LightDirectionVector(pos, normal);
Vector3D ev = EyeDirectionVector(pos, eyePos);
double a = nml.DotProd(lv);
Vector3D rv = nml.SclProd(2.0D * a).Sub(lv);
double cosc = rv.DotProd(ev);
if (cosc > 0.0D)
{
double k = Math.Pow(cosc, mate.specularSharpness);
for (int i = 0; i < 3; i++)
{
ret.SetElement(i, Strength(pos).GetElement(i) * k * mate.specular.GetElement(i));
}
}
}
return(ret);
}
private LightColor Diffuse(Vector3D pos, Vector3D normal, Material mate)
{
LightColor ret = new LightColor(0.0D, 0.0D, 0.0D);
Vector3D nml = normal.NmlVec();
Vector3D lv = LightDirectionVector(pos, normal);
double cosc = nml.DotProd(lv);
if (cosc > 0.0D)
{
for (int i = 0; i < 3; i++)
{
ret.SetElement(i, Strength(pos).GetElement(i) * cosc
* mate.diffuse.GetElement(i));
}
}
return(ret);
}
