k3d/share/shaders/k3d_softboxes.sl:112:    varying vector Vlight = vtransform (boxCoords, reflVect);
k3d/share/shaders/k3d_softboxes.sl:113:    varying float zv = zcomp(Vlight);
k3d/share/shaders/k3d_softboxes.sl:114:    varying point Pplane = Pb1 - Vlight*(zcomp(Pb1)/zcomp(Vlight));
k3d/share/shaders/k3d_softboxes.sl:130:    if (sign(zcomp(Pb1)) == sign(zcomp(Vlight))) {
k3d/share/shaders/k3d_uberlight.sl:356:      vector Vlight = (Pb1 - Pb2);
k3d/share/shaders/k3d_uberlight.sl:357:      point Pplane = Pb1 - Vlight * (zcomp(Pb1) / zcomp(Vlight));
