lab/lmapper/shaders/mp_plastic.sl

/****************************
Plastic Surface Shader
(c) Mad Processor, 2009

Features Color texture mapping
and Opacity texture mapping

*****************************/

surface 
mp_plastic(
	float Ks = .5;
	float Kd = .5;
	float Ka = 1;
	float roughness = .1; 
	color specularcolor = 1;
	string texturename = "";
	string alphamap = "";)
{
	normal Nf;
	vector V;
	color Ct;
	float a;

	Nf = faceforward(normalize(N), I);
	V = normalize(-I);

	Ct = ( texturename != "" ) ?
		texture( texturename, "filter", "gaussian" ) : 1.0;
	a = ( alphamap != "" ) ?
		texture( alphamap[3], "filter", "gaussian" ) : 1.0;

		
	Oi = Os*a;
	Ci = (Cs * Ct * (Ka * ambient() + Kd * diffuse(Nf)) + 
		specularcolor * Ks * specular(Nf, V, roughness));

	Ci *= Oi;
}