I’m using the VFX graph and trying to set the particle velocity to the inverted vertex normal to prevent particles from “leaving” the inside of my mesh. I’m new to VFX graph so I don’t know if I’m doing something wrong. This is what I have so far:
I’m not inverting the normals right now, I just wanted to see the particles following the vertex normal direction. Can anyone help me with this?
Your setup should be accesing normals just fine (i see you are multiplying by 0, but im guessing you have tried without that).
But still, if you can read the mesh, then it should be fine. Do you have “Read/Write” enabled on the mesh import settings?
From the docs ( Sample Mesh | Visual Effect Graph | 17.0.3 (unity3d.com))
Limitations
The Mesh sampling feature has the following limitations:
- It only supports VertexAttributeFormat.Float32 for all VertexAttributes except Color, which has to be a four component attribute using either VertexAttributeFormat.UInt8 or VertexAttributeFormat.Float32 format.
- If the mesh isn’t readable, the Operator returns 0. For information on how to make a mesh readable in the Editor, refer to the Import Settings for a model file.
- Visual Effect Graph can’t sample the current Skinned Mesh Renderer if you disable Update When Offscreen in a Skinned Mesh Renderer and the mesh bounds aren’t visible. Visual Effect Graph uses the position, normal and tangent of the last visible frame.
Thanks, Canijo (and I appreciate you answering my questions!). This was one of my issues earlier but there’s another problem that I just found here: I was setting the position to a random vertex position and trying to access the normals later using particleId. But Unity was setting the position randomly! So instead I made my random position setter and used particleId later. That solved the issue.
