k3d/share/shaders/k3d_gooch.sl:42:    float ldotn, blendval;
k3d/share/shaders/k3d_gooch.sl:49:        blendval = 0.5*(1+ldotn);
k3d/share/shaders/k3d_gooch.sl:50:        Cgooch += mix(kcool,kwarm,blendval); 
