Mesh Merging error

Questions
1

Hi all, I got an error “cannot merge vertex data that do not have the same set of attributes”, when I was trying to merge a mesh created by SPS and a mesh from MeshBuilder. I reproduced a PG: https://playground.babylonjs.com/#2FPT1A#637. I have been haunted by this error for few days, any clue or hint to get rid of this will be appreciated very much.

2

This error is because the two meshes have different Vertex data:
image

Check line 67 and 68;

  console.log([ground, mesh].map((t)=>t.getVerticesDataKinds()))
  mesh.removeVerticesData(BABYLON.VertexBuffer.ColorKind)

67 console logs the vertices data and we can see the mesh has one more attribute which is the color;

68 removes the color attribute of the mesh;

Another alternative to my solution above is replacing line 68 with code that adds ColorKind vertex data to the ground rather than remove it from the mesh.

  console.log([ground, mesh].map((t)=>t.getVerticesDataKinds()))
//   mesh.removeVerticesData(BABYLON.VertexBuffer.ColorKind)
  ground.setVerticesData(BABYLON.VertexBuffer.ColorKind,new Float32Array(mesh.getVerticesData(BABYLON.VertexBuffer.ColorKind).byteLength))
// same size
  console.log([ground, mesh].map((t)=>t.getVerticesDataKinds()))

Each of the above will affect how the ground/mesh looks since you’re playing with color data; So watch out how you use it

3 Likes
3

Thanks for your swift reply which really saved me. really appreciate.
As I have no idea about how to debug the vertex data with method getVerticesDataKinds(), I even rebuilt the ground with VertexData and applied all the positions, indices, normals, uvs except colors to the VertexData…
Thanks again.

1 Like