How to move an agent across unwrapped mesh edges (with toxiclibs?)

23947sdhfs

How to move an agent across unwrapped mesh edges (with toxiclibs?)

in Contributed Library Questions • 2 years ago

I have an agent system and would like my agents to move on the surface of an arbitrary 3D shape.

It would be great to hear the suggestions on how to make this happen.

Here is what I thought:

1. Make a 3D model in an external application.

2. Unwrap it there into a flat model (using UV Unwrap or a different method).

3. Make the agents move on the unwrapped mesh in 2D (problem: how can I make them move across separated edges?).

4. Export the 2D positions into an external application, generate a texture there and wrap it back onto 3D geometry.

Can someone advise on how to achieve p.3?

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amnon.owed

Re: How to move an agent across unwrapped mesh edges (with toxiclibs?)

2 years ago

Also see your classmate's post here.

I'm wondering if the end goal is to move agents on a 3D shape or if it's the texture?

Anyway, with regard to your question. Looking at this from the original shape (not the unwrapped one), it seems to me that when the agent moves from one triangle to another:

the two triangles share two vertices
the agent's position is somewhere between these two vertices

...which really narrows down the potential destination triangles. It seems to me that each triangle has three possible destination triangles. And each side of a triangle only has one (side of another) destination triangle. Perhaps you could test/use this theory and practically implement it by either running the whole thing (simultaneously) on the original mesh or storing that information in the unwrapped mesh.

Another suggestion would be to check out Toxiclibs' Intersector interface and the texturedTriangleMesh, which might come in handy here.

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