Project training of Shandong University rendering engine system (V)

Catalog

Project introduction

NRD

Project objectives

Work at current stage

Set member variables

Yes NRD SDK Some variables rewrite the initial value

take dict Medium value Assign to corresponding key Value settings

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Project introduction

NRD

full name Nvidia Real-time Denoiser , It is a spatiotemporal dual domain noise reduction library being developed by NVIDIA , Designed to deal with low RPP（ray per pixel） The signal .

The graphics of this technology API The environment is ：DirectX11、DirectX12 as well as Vulkun. There are three integration methods , One way is to use Nvidia Of NRI（NVIDIA Rendering Interface） Package the above three API, To integrate .

Project objectives

stay Falcor Integration under the framework nrd.

Work at current stage

Write constructors NRDPass()

NRDPass::NRDPass(const Dictionary& dict)

Pass in the parameter Dictionary

Set member variables

    Program::DefineList definesRelax;
    definesRelax.add("NRD_USE_OCT_NORMAL_ENCODING", "1");
    definesRelax.add("NRD_USE_MATERIAL_ID", "0");
    definesRelax.add("NRD_METHOD", "0"); 
    mpPackRadiancePassRelax = ComputePass::create(kShaderPackRadiance, "main", definesRelax);

    Program::DefineList definesReblur;
    definesReblur.add("NRD_USE_OCT_NORMAL_ENCODING", "1");
    definesReblur.add("NRD_USE_MATERIAL_ID", "0");
    definesReblur.add("NRD_METHOD", "1"); 
    mpPackRadiancePassReblur = ComputePass::create(kShaderPackRadiance, "main", definesReblur);

Yes NRD SDK Some variables rewrite the initial value

    mRelaxDiffuseSpecularSettings.diffusePrepassBlurRadius = 16.0f;
    mRelaxDiffuseSpecularSettings.specularPrepassBlurRadius = 16.0f;
    mRelaxDiffuseSpecularSettings.diffuseMaxFastAccumulatedFrameNum = 2;
    mRelaxDiffuseSpecularSettings.specularMaxFastAccumulatedFrameNum = 2;
    mRelaxDiffuseSpecularSettings.diffuseLobeAngleFraction = 0.8f;
    mRelaxDiffuseSpecularSettings.disocclusionFixMaxRadius = 32.0f;
    mRelaxDiffuseSpecularSettings.enableSpecularVirtualHistoryClamping = false;
    mRelaxDiffuseSpecularSettings.disocclusionFixNumFramesToFix = 4;
    mRelaxDiffuseSpecularSettings.spatialVarianceEstimationHistoryThreshold = 4;
    mRelaxDiffuseSpecularSettings.atrousIterationNum = 6;
    mRelaxDiffuseSpecularSettings.depthThreshold = 0.02f;
    mRelaxDiffuseSpecularSettings.roughnessFraction = 0.5f;
    mRelaxDiffuseSpecularSettings.specularLobeAngleFraction = 0.9f;
    mRelaxDiffuseSpecularSettings.specularLobeAngleSlack = 10.0f;

    mRelaxDiffuseSettings.prepassBlurRadius = 16.0f;
    mRelaxDiffuseSettings.diffuseMaxFastAccumulatedFrameNum = 2;
    mRelaxDiffuseSettings.diffuseLobeAngleFraction = 0.8f;
    mRelaxDiffuseSettings.disocclusionFixMaxRadius = 32.0f;
    mRelaxDiffuseSettings.disocclusionFixNumFramesToFix = 4;
    mRelaxDiffuseSettings.spatialVarianceEstimationHistoryThreshold = 4;
    mRelaxDiffuseSettings.atrousIterationNum = 6;
    mRelaxDiffuseSettings.depthThreshold = 0.02f;

take dict Medium value Assign to corresponding key Value settings

    for (const auto& [key, value] : dict)
    {
        if (key == kEnabled) mEnabled = value;
        else if (key == kMethod) mDenoisingMethod = value;

        // Common settings.
        else if (key == kWorldSpaceMotion) mWorldSpaceMotion = value;
        else if (key == kDisocclusionThreshold) mDisocclusionThreshold = value;

        // Pack radiance settings.
        else if (key == kMaxIntensity) mMaxIntensity = value;

        // ReLAX diffuse/specular settings.
        else if (mDenoisingMethod == DenoisingMethod::RelaxDiffuseSpecular || mDenoisingMethod == DenoisingMethod::ReblurDiffuseSpecular)
        {
            Length is too long , Don't show 
        }
        else if (mDenoisingMethod == DenoisingMethod::RelaxDiffuse)
        {
            Length is too long , Don't show 
        }
        else
        {
            logWarning("Unknown field '{}' in NRD dictionary.", key);
        }