k3d/share/shaders/k3d_uberlight.sl:294:  float Pz;
k3d/share/shaders/k3d_uberlight.sl:297:      Pz = zcomp(PL);
k3d/share/shaders/k3d_uberlight.sl:302:      Pz = PLlen;
k3d/share/shaders/k3d_uberlight.sl:304:  atten *= smoothstep(znear - nearedge, znear, Pz);
k3d/share/shaders/k3d_uberlight.sl:305:  atten *= 1 - smoothstep(zfar, zfar + faredge, Pz);
k3d/share/shaders/k3d_uberlight.sl:328:	1 - clipSuperellipse(PL / Pz - point(shearx, sheary, 0), width,
