Method DrawParticles

Source/Engine/Particles/Particles.cpp:1137–1298

#endif

void Particles::DrawParticles(RenderContextBatch& renderContextBatch, ParticleEffect* effect)
{
    PROFILE_CPU();
    PROFILE_MEM(Particles);

    // Drawing assumes that all views within a batch have the same Origin
    const Vector3& viewOrigin = renderContextBatch.GetMainContext().View.Origin;
    BoundingSphere bounds = effect->GetSphere();
    bounds.Center -= viewOrigin;

    // Cull particles against all views
    bool drawAnyView = false, drawMainView = false;
    DrawPass viewsDrawModes = DrawPass::None;
    for (int32 i = 0; i < renderContextBatch.Contexts.Count(); i++)
    {
        const RenderView& view = renderContextBatch.Contexts.Get()[i].View;
        const bool visible = (view.Pass & effect->DrawModes) != DrawPass::None && (view.IsCullingDisabled || view.CullingFrustum.Intersects(bounds));
        if (visible)
        {
            drawAnyView = true;
            drawMainView |= i == 0;
            viewsDrawModes |= view.Pass;
        }
    }
    if (drawAnyView == false)
        return;
    viewsDrawModes &= effect->DrawModes;

    // Setup
    ScopeReadLock systemScope(SystemLocker);
    Matrix worlds[2];
    Matrix::Translation(-viewOrigin, worlds[0]); // World
    renderContextBatch.GetMainContext().View.GetWorldMatrix(effect->GetTransform(), worlds[1]); // Local
    const StaticFlags staticFlags = effect->GetStaticFlags();
    const int8 sortOrder = effect->SortOrder;

    // Draw lights (only to into the main view)
    if (drawMainView && renderContextBatch.GetMainContext().View.Pass != DrawPass::Depth)
    {
        for (int32 emitterIndex = 0; emitterIndex < effect->Instance.Emitters.Count(); emitterIndex++)
        {
            auto& emitterData = effect->Instance.Emitters[emitterIndex];
            const auto buffer = emitterData.Buffer;
            if (!buffer || (buffer->Mode == ParticlesSimulationMode::CPU && buffer->CPU.Count == 0))
                continue;
            auto emitter = buffer->Emitter;
            if (!emitter || !emitter->IsLoaded())
                continue;

            buffer->Emitter->GraphExecutorCPU.Draw(buffer->Emitter, effect, emitterData, renderContextBatch.GetMainContext(), worlds[(int32)emitter->SimulationSpace]);
        }
    }

    // Setup a draw call common data
    DrawCall drawCall;
    drawCall.PerInstanceRandom = effect->GetPerInstanceRandom();
    drawCall.SetStencilValue(effect->GetLayer());
    drawCall.ObjectPosition = bounds.Center;