Method HnBeginFrameTask

Hydrogent/src/Tasks/HnBeginFrameTask.cpp:72–106

}

HnBeginFrameTask::HnBeginFrameTask(pxr::HdSceneDelegate* ParamsDelegate, const pxr::SdfPath& Id) :
    HnTask{Id}
{
    if (ParamsDelegate == nullptr)
    {
        UNEXPECTED("ParamsDelegate is null");
        return;
    }
    pxr::HdRenderIndex& RenderIndex = ParamsDelegate->GetRenderIndex();

    // Insert empty Bprims for offscreen render targets into the render index.
    // The render targets will be created when Prepare() is called and the
    // dimensions of the final color target are known.
    auto InitBrim = [&](const pxr::TfToken& Name) {
        pxr::SdfPath Id = GetId().AppendChild(Name);
        RenderIndex.InsertBprim(pxr::HdPrimTypeTokens->renderBuffer, ParamsDelegate, Id);
        return Id;
    };

    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_SCENE_COLOR]   = InitBrim(HnRenderResourceTokens->offscreenColorTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_MESH_ID]       = InitBrim(HnRenderResourceTokens->meshIdTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_MOTION_VECTOR] = InitBrim(HnRenderResourceTokens->motionVectorsTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_NORMAL]        = InitBrim(HnRenderResourceTokens->normalTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_BASE_COLOR]    = InitBrim(HnRenderResourceTokens->baseColorTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_MATERIAL]      = InitBrim(HnRenderResourceTokens->materialDataTarget);
    m_GBufferTargetIds[HnFrameRenderTargets::GBUFFER_TARGET_IBL]           = InitBrim(HnRenderResourceTokens->iblTarget);
    static_assert(HnFrameRenderTargets::GBUFFER_TARGET_COUNT == 7, "Please initialize GBuffer BPrims.");

    m_SelectionDepthBufferId     = InitBrim(HnRenderResourceTokens->selectionDepthBuffer);
    m_DepthBufferId[0]           = InitBrim(HnRenderResourceTokens->depthBuffer0);
    m_DepthBufferId[1]           = InitBrim(HnRenderResourceTokens->depthBuffer1);
    m_ClosestSelLocnTargetId[0]  = InitBrim(HnRenderResourceTokens->closestSelectedLocation0Target);
    m_ClosestSelLocnTargetId[1]  = InitBrim(HnRenderResourceTokens->closestSelectedLocation1Target);
    m_JitteredFinalColorTargetId = InitBrim(HnRenderResourceTokens->jitteredFinalColorTarget);
}

HnBeginFrameTask::~HnBeginFrameTask()
{