Evaluate Surface Reverse

[Johnny1 (Johnny)]

Evaluate surface will give you the normal direction of a point in the UV.

Is there something I can use where i give it the normal direction instead and it places points on the surface UV?

Basically Evaluate Surface but backwards.

[akilli (Ethan Gross)]

As you can see here, there might be more than one place in which this occurs even if you fine tune it, also, the more points you subdivide by, the messier, but anyway…

find surface uv’s.gh (17.2 KB)

[Johnny1 (Johnny)]

Thank you so much! I think this will be really useful for what im trying to do.

Im trying to imitate an environment map except using curves instead of textures.

Environment Maps As Curves

So im working with Make2D to export vectors to illustrator. I want to create a cell shaded effect similar to the effect of an environment map. The problem is that environment maps don’t export any of the color changes as curves. Is it possible to recreate the effect of an environment map on grasshopper using curves? The cell shaded effect doesn’t have any smooth gradients so it seems possible. I also don’t mind if the effect doesn’t change with camera movement like a real environment map. A …

I hope your help will get me one step closer.

[akilli (Ethan Gross)]

Another possible approach:

environment map curves.gh (809.1 KB)