There are a variety of ways you could draw eyes. But, as a matter of
priorities, I would first focus in laying down a trail (or sequence of
turtles) indicating the turtle's path.

You could use a texture (internal image) to put eyes on your turtle. You
could do something like a soccer ball with only one black face. (Clipping
would mean the part inside the turtle wouldn't be seen.) You could do
movement by moving the eye geometry or you could do movement with a
sequence of images that you index through. Etc.

But it's good to learn to walk before you run...

Thanks,

-- 
Raul

On Sat, Feb 29, 2020 at 6:24 PM Brian Schott <[email protected]> wrote:

> 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=)
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