k3d/share/shaders/k3d_eyeball.sl:66:  float displayed, newdisp;
k3d/share/shaders/k3d_eyeball.sl:95:      displayed = 0;
k3d/share/shaders/k3d_eyeball.sl:99:	  displayed += (1-displayed) * newdisp * smoothstep (.1, .85, turb * turb);
k3d/share/shaders/k3d_eyeball.sl:103:      Cball = mix (eyeballcolor, bloodcolor, smoothstep(0,.75,displayed));
