[SOLVED] Does it really happen that an 3D object imported into Assimp has multiple meshes?

Does it really happen that an 3D object imported into Assimp has multiple meshes?

In Assimp API aiNode can be linked with multiple meshes.

    for (int i = 0; i < node->mNumMeshes; ++i)
    {
        auto j = node->mMeshes[i];
        aiMesh *mesh = scene->mMeshes[j];
    }

I unsuccessfully tried to create such file (FBX/OBJ/DAE) for testing purposes. Can you please provide example of such file where some object linked with multiple meshes. Is it ever possible for FBX/OBJ/DAE or this feature implemented for other 3D formats? For example in Blender there no possibility (as far as I know) to put multiple meshes into one object.

Blender

Solution

You can use our test data, this file could be interesting for you I guess Testmodel.

In Assimp we are using multiple meshes to manage different materials and animations. At this moment each mesh has one material assigned. Other topics are skeletal-based animations: we are modeling the skeleton via instances of scene-nodes. And each node has a dedicated mesh assigned to it.