k3d/share/shaders/k3d_graphic_lines.sl:157:	vector Ndisp_highlight=normalize(N_highlight)*(0/max(spacescale_highlight,1e-6));
k3d/share/shaders/k3d_graphic_lines.sl:159:	P_highlight+=0*Ndisp_highlight;
k3d/share/shaders/k3d_graphic_lines.sl:160:	N_highlight=normalize(calculatenormal(P_highlight+(1-0)*Ndisp_highlight));
