k3d/share/shaders/k3d_graphic_lines.sl:329:	vector normI, half;
k3d/share/shaders/k3d_graphic_lines.sl:335:	normI = normalize(I);
k3d/share/shaders/k3d_graphic_lines.sl:363:	cos_here = normalize(Nf).normI;
k3d/share/shaders/k3d_toonmap.sl:123:vector normI, half;
k3d/share/shaders/k3d_toonmap.sl:129:normI = normalize(I);
k3d/share/shaders/k3d_toonmap.sl:157:cos_here = normalize(Nf).normI;
