Method Update

Source/Engine/Renderer/ProbesRenderer.cpp:282–355

}

void ProbesRendererService::Update()
{
    PROFILE_MEM(Graphics);

    // Calculate time delta since last update
    auto timeNow = Time::Update.UnscaledTime;
    auto timeSinceUpdate = timeNow - _lastProbeUpdate;
    if (timeSinceUpdate < 0)
    {
        _lastProbeUpdate = timeNow;
        timeSinceUpdate = 0;
    }

    // Check if render job is done
    if (_updateFrameNumber > 0 && _updateFrameNumber + PROBES_RENDERER_LATENCY_FRAMES <= Engine::FrameCount)
    {
        // Create async job to gather probe data from the GPU
        GPUTexture* texture = nullptr;
        switch (_current.Type)
        {
        case ProbeEntry::Types::SkyLight:
        case ProbeEntry::Types::EnvProbe:
            texture = _probe;
            break;
        }
        ASSERT(texture && _current.UseTextureData());
        auto taskB = New<DownloadProbeTask>(texture, _current);
        auto taskA = texture->DownloadDataAsync(taskB->GetData());
        ASSERT(taskA);
        taskA->ContinueWith(taskB);
        taskA->Start();

        // Clear flag
        _updateFrameNumber = 0;
        _workStep = 0;
        _current.Type = ProbeEntry::Types::Invalid;
    }
    else if (_current.Type == ProbeEntry::Types::Invalid && timeSinceUpdate > ProbesRenderer::UpdateDelay)
    {
        int32 firstValidEntryIndex = -1;
        auto dt = Time::Update.UnscaledDeltaTime.GetTotalSeconds();
        for (int32 i = 0; i < _probesToBake.Count(); i++)
        {
            auto& e = _probesToBake[i];
            e.Timeout -= dt;
            if (e.Timeout <= 0)
            {
                firstValidEntryIndex = i;
                break;
            }
        }

        // Check if need to update probe
        if (firstValidEntryIndex >= 0 && timeSinceUpdate > ProbesRenderer::UpdateDelay)
        {
            if (LazyInit())
                return; // Shader is not yet loaded so try the next frame