solved Mesh.setVerticesData() should accept custom vertex attributes (other than color, uv etc.)

[bilgorajskim]

Hello everyone!

 

Currently when I'm adding vertex attributes other than those specified in VertexBuffer (PositionKind etc.) via Mesh.setVerticesData(), it throws an error:

Uncaught (in promise) Error: Invalid kind 'test'

 

I think it would be useful to be able to add attributes of any kind. For example:

I have a terrain mesh with a custom shader that takes "color" (vec3) and "moisture, temperature" (vec2) vertex attributes.

It uses moisture and temperature to mix between 4 greyscale ground textures (wet and hot; dry and hot; wet and cold; dry and cold) and colorizes it.

Now I have two options:

- use UV2Kind, UV3Kind.. - it will work in this use case, but they are all vec2 and I may need a couple of vec3 in the future

- manually create a Buffer and attach it to the mesh via mesh.setVerticesBuffer() - I'm trying to figure out how to do it.

InstancedMesh is using setVerticesBuffer():

https://github.com/BabylonJS/Babylon.js/blob/c5e53c8f89b115a4c151d8dfce2e9eba12bd08b6/src/Mesh/babylon.mesh.ts#L1387

I'm unsure how to use it with a typical, non-instanced mesh. I would be very thankful for an example.

I wasn't sure whether to post in Bugs or Questions, please move the thread if you consider it more a question than a bug.

EDIT:

I figured out a way:

var vertexBuffer = new VertexBuffer(

this.engine, builtMesh.groundData, "test", false, false, 2);

mesh.geometry!.setVerticesBuffer(vertexBuffer);

But still, wouldn't it be more convenient with setVerticesData?

[Guest]

Well I think that mesh.setVerticesData("test", data) should work. Do you have a repro of your issue in the PG?

[bilgorajskim]

I know why it didn't work..

I was calling it like this:

mesh.setVerticesData("test", builtMesh.groundData);

When it should be this:

mesh.setVerticesData("test", builtMesh.groundData, false, 2);

The stride must be specified, otherwise Babylon will try to deduce it and fail. Logical. My bad. Problem solved

[Guest]

Wonderful