Method SaveLOD

Source/Engine/Content/Assets/ModelBase.cpp:463–605

}

bool ModelBase::SaveLOD(WriteStream& stream, int32 lodIndex) const
{
    // Download all meshes buffers from the GPU
    Array<Task*> tasks;
    Array<const MeshBase*> meshes;
    GetMeshes(meshes, lodIndex);
    const int32 meshesCount = meshes.Count();
    struct MeshData
    {
        BytesContainer VB[3];
        BytesContainer IB;
    };
    Array<MeshData> meshesData;
    meshesData.Resize(meshesCount);
    tasks.EnsureCapacity(meshesCount * 4);
    for (int32 meshIndex = 0; meshIndex < meshesCount; meshIndex++)
    {
        const auto& mesh = *meshes[meshIndex];
        auto& meshData = meshesData[meshIndex];

        // Vertex Buffer 0 (required)
        auto task = mesh.DownloadDataGPUAsync(MeshBufferType::Vertex0, meshData.VB[0]);
        if (task == nullptr)
            return true;
        task->Start();
        tasks.Add(task);

        // Vertex Buffer 1 (optional)
        task = mesh.DownloadDataGPUAsync(MeshBufferType::Vertex1, meshData.VB[1]);
        if (task)
        {
            task->Start();
            tasks.Add(task);
        }

        // Vertex Buffer 2 (optional)
        task = mesh.DownloadDataGPUAsync(MeshBufferType::Vertex2, meshData.VB[2]);
        if (task)
        {
            task->Start();
            tasks.Add(task);
        }

        // Index Buffer (required)
        task = mesh.DownloadDataGPUAsync(MeshBufferType::Index, meshData.IB);
        if (task == nullptr)
            return true;
        task->Start();
        tasks.Add(task);
    }

    // Wait for async tasks
    if (Task::WaitAll(tasks))
        return true;

    // Create meshes data
    static_assert(MODEL_MESH_VERSION == 2, "Update code");
    stream.Write(MODEL_MESH_VERSION);