Very nice, Tom. I removed 1,"1~ from colorData1=: 1&fc ,1,"1~_3]\3#"2] 0&". ;._2 [ 0 : 0 and got 1-color tetrahedral faces.
In a_g_paint changing glClearColor 0 0 0 0 to glClearColor 0 0 0 1 produce black background for the window. I'm anxious to figure out more, like how to put static eyes on the turtles; moving eyes would be even better. Is that a texture thing? I've never used textures or fragment shaders. -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
