Updating softbody vertex color at runtime

[Aroosh]

Hello

I am using a vertex color shader with softbody and want to update the vertex colors for the mesh. The issue is when I try to get the mesh from Skinner it does not give me the mesh that's currently being used but instead gives the shared mesh. 

Thank
Aroosh

[josemendez]

Hello

I am using a vertex color shader with softbody and want to update the vertex colors for the mesh. The issue is when I try to get the mesh from Skinner it does not give me the mesh that's currently being used but instead gives the shared mesh. 

Thank
Aroosh

Hi Aroosh,

Softbodies are not rendered by a SkinnedMeshRenderer component, but by ObiSoftbodySkinner. This batches together meshes belonging to multiple softbodies depending on their material/render settings, in order to be able to efficiently update them in parallel. So if you have eg. 6 softbodies in your solver and 4 of them use the same render settings, you'll get 3 meshes: one for the 4 batched softbodies, and 2 for the remaining softbodies. This is much more efficient than having to go over each individual mesh in the main thread, or spawning a separate job per mesh.

Note that particle colors (the values in the solver.colors array, that you can paint in the softbody editor and also modify at runtime) are automatically transferred to the vertex color attributes of the rendered mesh(es), so you can just provide particle colors from C# and everything else will just work. Here's particle colors painted in the blueprint editor, and the resulting softbody at runtime:




kind regards,

[Aroosh]

Just updating solver.colors array did it for me. Thank you for your prompt reply!