k3d/share/shaders/k3d_hextile.sl:19: *    tileradius - the "radius" (in s-t units) of a single tile
k3d/share/shaders/k3d_hextile.sl:52:	 float tileradius = 0.2;
k3d/share/shaders/k3d_hextile.sl:81:  tilewidth = tileradius * 1.7320508;  /* sqrt(3) */
k3d/share/shaders/k3d_hextile.sl:82:  tt = mod (t, 1.5*tileradius);
k3d/share/shaders/k3d_hextile.sl:83:  ttile = floor (t/(1.5*tileradius));
k3d/share/shaders/k3d_hextile.sl:91:  if (tt < tileradius) {
k3d/share/shaders/k3d_hextile.sl:97:      y = 1.7320508 * (tt - tileradius);
