How to pass data to custom TMP shader?

Hi,

I want to pass additional data to a customized TMP shader.
For the data, I would want to utilize an unused UV channel, e.g. TEXCOORD2.

I tried various ways to assign the data to the mesh by script:

• setting the meshInfo's mesh UVs: textfield.textInfo.meshInfo[0].mesh.SetUVs(2, uvs);
• setting the mesh's UVs: textfield.mesh.SetUVs(2, uvs);

in combination with updating the mesh via:

• textfield.UpdateGeometry(textfield.mesh)
  
• textfield.UpdateGeometry(textfield.textInfo.meshInfo[0].mesh)
  
• textfield.mesh.UploadMeshData();
  
• textfield.textInfo.meshInfo[0].mesh.UploadMeshData();

No success. TMP seems to wipe out all data channels that it doesn't use by default (POSITION, NORMAL, COLOR, TEXCOORD0, TEXCOORD1).


Is there any way to accomplish passing custom data to a TMP shader?


Cheers.

 

Hi,

I did some further testing.

Mesh Renderer based TMP works out of the box.
To pass data to Canvas based TMP shaders, you have to:

1. enable the appropriate additional shader channel(s) on the Canvas component
2. after having set the data on the mesh, call one of these methods on your tmp reference:
   • ForceMeshUpdate()
     
   • UpdateGeometry()

Cheers.