Shader Vertex Position During Animation

Question

I'm using a normalized local X vertex position to detect if a vertex is on the right (1) or left (-1) of the mesh, but the problem is during animations the vertexes are swapping 'sides' and it's messing up my shader. For example during an IK head turn (to the right) the left cheek crosses from negative local position X to positive during the head turn.

Does anyone know of a solution to this?

Answer 1

Best Answer

Answer by Pangamini · Dec 07, 2016 at 11:55 AM

You could store the original vertex position (or just the 'side' information) into buffers you don't need, eg. uv2, color and use that instead of skinned vertex position; To do that, you could duplicate / modify the mesh on runtime (once, in Start or somewhere) or do it offline in the editor (I haven't tried this, but I think you can modify the MeshImporter to do custom stuff to meshes created from files on import)

0 Show 3 · Share

Liens · Dec 07, 2016 at 02:03 PM 0

Share

Thanks that worked great. I used vertex colours, painted one side red, one side blue and did R*-1 + B

Pangamini Liens · Dec 07, 2016 at 02:06 PM 0

Share

No problem. Tehnically it works and there's no problem in it, but if you wanted to conserve channels (to use color for something else) you could just use Color.R, for 0 being left and 1 being right

Liens Pangamini · Dec 07, 2016 at 02:13 PM 0

Share

Even better, thanks :)

Shader Vertex Position During Animation

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions