k3d/share/shaders/k3d_contacshadow.sl:24:    uniform matrix matNl;  
k3d/share/shaders/k3d_contacshadow.sl:25:    textureinfo(shadowname, "viewingmatrix", matNl);  
k3d/share/shaders/k3d_contacshadow.sl:50:	point cameraP = transform(matNl, P);  
