Modifying Texture Coordinates with Buffer Problem

Troubleshooting graphics
1

It might be a bit hard to explain, but I want to reassign texture coordinates of a mesh. I used mesh.getFloatBuffer(Type.TexCoord) to get the FloatBuffer and used put(index, float). But it seems to only work well before optimizing the parent node with GeometryBatchFactory.

[java]for (int i = 0; i < node.getQuantity(); i++) {

Mesh mesh = ((Geometry) node.getChild(i)).getMesh();

FloatBuffer texCoords = mesh.getFloatBuffer(Type.TexCoord);

FloatBuffer vertices = mesh.getFloatBuffer(Type.Position);



for (int j = 0; j < mesh.getVertexCount() * 2;) {

lights.put(j, calcValue(vertices.get(j + j / 2), vertices.get(j + j / 2 + 1), vertices.get(j + j / 2 + 2)));

j += 2;

}



mesh.updateCounts();

mesh.updateBound();

}[/java]

This is what happens in my code:

  1. Create mesh
  2. Attach to node
  3. Optimize node

    It always works when I do it between 2 and 3, but not after 3.

    Success:



    Fail:

2

Optimising has probably taken its own copy of the buffer. Is this behaviour a problem?

3

@zarch Ah, that makes sense. Thanks. It’s not too much of a problem (for now), but it pauses for a fraction of a second when I recreate the mesh, even when I use executor.submit(callable).

4

I’m not sure what you mean by executor.submit.



You mean you are creating the mesh in a different thread and then sending it back to the app thread for processing?

5

If you are creating your own mesh why do you need to optimise it anyway? Can’t you just make it optimised?

6

Yes, I’m multithreading. I optimize it through GeometryBatchFactory since I attach geometries one at a time to a node, which accumulates to hundreds. It merges geometries with the same materials for me.