Method load

Source/Engine/Particles/ParticleEmitter.cpp:107–353

#endif

Asset::LoadResult ParticleEmitter::load()
{
    PROFILE_MEM(Particles);

    // Load the graph
    const auto surfaceChunk = GetChunk(SHADER_FILE_CHUNK_VISJECT_SURFACE);
    if (!surfaceChunk)
    {
        // Initialize as empty graph with only root node (no modules)
        Graph.CreateDefault();
        return LoadResult::Ok;
    }
    if (LoadChunks(GET_CHUNK_FLAG(SHADER_FILE_CHUNK_VISJECT_SURFACE)))
    {
        LOG(Warning, "Cannot load \'{0}\' data from chunk {1}.", ToString(), SHADER_FILE_CHUNK_VISJECT_SURFACE);
        return LoadResult::CannotLoadStorage;
    }
    MemoryReadStream surfaceChunkStream(surfaceChunk->Get(), surfaceChunk->Size());
    if (Graph.Load(&surfaceChunkStream, USE_EDITOR))
    {
        LOG(Warning, "Cannot load Particle Emitter graph '{0}'.", GetPath());
        return LoadResult::CannotLoadData;
    }

    // Cache data
    {
        auto root = Graph.Root;
        if (root->Values.Count() != 6)
        {
            Graph.Clear();
            Graph.CreateDefault();
            LOG(Warning, "Invalid Particle Emitter graph root node '{0}'.", GetPath());
        }
        Capacity = root->Values[0].AsInt;
        SimulationMode = (ParticlesSimulationMode)root->Values[1].AsInt;
        SimulationSpace = (ParticlesSimulationSpace)root->Values[2].AsInt;
        EnablePooling = root->Values[3].AsBool;
        CustomBounds = (BoundingBox)root->Values[4];
        UseAutoBounds = root->Values[5].AsBool;
        IsUsingLights = Graph.LightModules.HasItems();
    }

    // Select simulation mode
    //SimulationMode = ParticlesSimulationMode::CPU;
    //SimulationMode = ParticlesSimulationMode::GPU;
    if (SimulationMode == ParticlesSimulationMode::Default)
    {
        // Use GPU simulation only for bigger systems
        SimulationMode = Capacity >= 1024 ? ParticlesSimulationMode::GPU : ParticlesSimulationMode::CPU;
    }
    if (SimulationMode == ParticlesSimulationMode::GPU)
    {
        // Downgrade to CPU simulation if no GPU support for that
        if (IsUsingLights || Graph.RibbonRenderingModules.HasItems() || Graph.UsesVolumetricFogRendering)
        {
            // Downgrade to CPU simulation for ribbons (no GPU support for that)
            SimulationMode = ParticlesSimulationMode::CPU;
        }