changing vertex positions in shader graph

Graphics Shaders & Materials
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1

I wonder if theres a way to give all vertices different position information in shadergraph.

What i want to do is, to save the blendshape information of an object into a texture and use that texture, to
apply different positions for the vertices through shader.

Saving that information is the easy part.
But so far, i failed to understand how to set different positions to different vertices in shadergraph.
Is there a way to adress every verties with index, or to make one vertices use the information from one specific pixel of the texture?

2

Hi, you can use the vertex’s UV position (also called texture coordinate) to sample a texture2D (LOD 0) in the vertex stage. If there’re lots of vertices in the mesh, I think you’ll have to create a special UV (1 pixel → 1 vertex’s UV) for it.

Note:

  • The position texture should be uncompressed
  • The UV set in use should be non-overlapping
3

Thank you for your reply. I’m not exactly sure, how your method works, but mentioning the UV gave me the right idea.
Ultimatly, i’m using the VertexID-Node with a bit of calculation to get the correct uv-coordinates for every pixel.
Works great, and as i hoped, i got a huge performance boost.