Getting Unique World Positions for Meshes in a GLB Model

The issue in your code is that you're reusing the same meshPos Vector3 object for all meshes. When you call getWorldPosition(), it modifies the vector you pass in, rather than creating a new one each time.

Here's how to fix your code to get unique positions for each mesh:

JAVASCRIPTCopied
model.updateMatrix()
model.updateMatrixWorld(true, true)

model.traverse((mesh) => {
  if(mesh.isMesh) {
    // Create a new Vector3 for each mesh
    const meshPos = new THREE.Vector3();
    mesh.getWorldPosition(meshPos);
    console.log(mesh.name, meshPos);
  }
})

By creating a new Vector3 for each mesh inside the traverse callback, you ensure that each position is stored in a separate object and won't be overwritten.

If you need to store these positions for later use, you could do something like:

JAVASCRIPTCopied
model.updateMatrix()
model.updateMatrixWorld(true, true)

const meshPositions = [];

model.traverse((mesh) => {
  if(mesh.isMesh) {
    const meshPos = new THREE.Vector3();
    mesh.getWorldPosition(meshPos);
    meshPositions.push({
      name: mesh.name,
      position: meshPos.clone() // Clone to ensure we have a separate copy
    });
  }
})

console.log(meshPositions);

This approach will give you the correct world positions for each mesh in your GLB model.