[DDGI] Add initial setup and probe visualizer

Author: Eclmist

src/graphics/config/graphicconfig.h

@@ -139,6 +139,14 @@ class ETH_GRAPHIC_DLL GraphicConfig
     int32_t m_SpatialHashSize = 1 << 16; // Roughly 1mb budget for a float3 payload
     float m_SpatialHashCellSize = 0.1; // Roughly 1mb budget for a float3 payload
 
+    // DDGI
+    float m_IrradianceFieldGridSpacing = 1.0f;
+    ethVector3 m_IrradianceFieldGridOrigin = { 0, 0, 0 };
+    ethVector3u m_IrradianceFieldGridResolution = { 32, 4, 32 };
+    uint32_t m_IrradianceFieldNumIrradianceInteroirTexels = 6;
+    uint32_t m_IrradianceFieldNumDepthInteroirTexels = 16;
+    float m_IrradianceFieldVisualizeProbeRadius = 0.1f;
+
 private:
     ethVector4 m_ClearColor;
     ethVector2u m_Resolution;

src/graphics/rhi/dx12/dx12translation.cpp

@@ -250,6 +250,8 @@ DXGI_FORMAT Ether::Graphics::Translate(const RhiFormat& rhiType)
         return DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
     case RhiFormat::R16G16B16A16Float:
         return DXGI_FORMAT_R16G16B16A16_FLOAT;
+    case RhiFormat::R16G16Float:
+        return DXGI_FORMAT_R16G16_FLOAT;
     case RhiFormat::R32G32Float:
         return DXGI_FORMAT_R32G32_FLOAT;
     case RhiFormat::R32G32B32Float:

src/graphics/rhi/rhienums.h

@@ -142,6 +142,7 @@ enum class RhiFormat
     R8G8B8A8UnormSrgb,
     R11G11B10Float,
     R16G16B16A16Float,
+    R16G16Float,
     R32G32Float,
     R32G32B32Float,
     R32G32B32A32Float,

src/graphics/rhi/rhiimguiwrapper.cpp

@@ -200,6 +200,28 @@ void Ether::Graphics::RhiImguiWrapper::DrawDebugMenu() const
                 ImGui::TreePop();
             }
 
+            if (ImGui::TreeNode("Global Illumination"))
+            {
+                if (ImGui::TreeNode("Irradiance Field"))
+                {
+                    uint32_t minRes = 1;
+                    uint32_t maxRes = 128;
+
+                    ImGui::SliderFloat("Grid Spacing", &gfxConfig.m_IrradianceFieldGridSpacing, 0.1f, 10.0f);
+                    ImGui::DragFloat3("Grid Origin", (float*)&gfxConfig.m_IrradianceFieldGridOrigin, 0.1f);
+                    ImGui::Separator();
+                    ImGui::DragScalarN("Grid Resolution", ImGuiDataType_U32, &gfxConfig.m_IrradianceFieldGridResolution, 3, 1.0f, &minRes, &maxRes);
+                    ImGui::Separator();
+                    ImGui::Text("Num Probes: %u", gfxConfig.m_IrradianceFieldGridResolution.x * gfxConfig.m_IrradianceFieldGridResolution.y * gfxConfig.m_IrradianceFieldGridResolution.z);
+                    ImGui::Text("Irradiance Interior Texels: %u", gfxConfig.m_IrradianceFieldNumIrradianceInteroirTexels);
+                    ImGui::Text("Depth Interior Texels: %u", gfxConfig.m_IrradianceFieldNumDepthInteroirTexels);
+                    ImGui::Separator();
+                    ImGui::SliderFloat("Visualize Probe Radius", &gfxConfig.m_IrradianceFieldVisualizeProbeRadius, 0.01f, 1.0f);
+                    ImGui::TreePop();
+                }
+                ImGui::TreePop();
+            }
+
             if (ImGui::TreeNode("Raytracing"))
             {
                 ImGui::Checkbox("Enabled", &gfxConfig.m_IsRaytracingEnabled);

src/graphics/schedule/framescheduler.cpp

@@ -32,6 +32,8 @@
 #include "graphics/schedule/producers/pathtracedlightingproducer.h"
 #include "graphics/schedule/producers/translucencyproducer.h"
 
+#include "graphics/schedule/producers/globalillumination/irradiancefieldproducer.h"
+
 #include "graphics/schedule/producers/postprocess/postfxsourceproducer.h"
 #include "graphics/schedule/producers/postprocess/bloomproducer.h"
 #include "graphics/schedule/producers/postprocess/depthoffieldproducer.h"
@@ -45,13 +47,14 @@
 
 DECLARE_GFX_PA(GBufferProducer)
 DECLARE_GFX_PA(GlobalConstantsProducer)
-DECLARE_GFX_PA(LightingCompositeProducer)
 DECLARE_GFX_PA(MaterialTableProducer)
 DECLARE_GFX_PA(ProceduralSkyProducer)
 DECLARE_GFX_PA(RaytracingResourceProducer)
+DECLARE_GFX_PA(IrradianceFieldProducer)
 DECLARE_GFX_PA(RaytracedLightingProducer)
 DECLARE_GFX_PA(RaytracedTranslucencyProducer)
 DECLARE_GFX_PA(PathtracedLightingProducer)
+DECLARE_GFX_PA(LightingCompositeProducer)
 DECLARE_GFX_PA(TranslucencyProducer)
 
 DECLARE_GFX_PA(PostFxSourceProducer)
@@ -60,6 +63,8 @@ DECLARE_GFX_PA(DepthOfFieldProducer)
 DECLARE_GFX_PA(TemporalAAProducer)
 DECLARE_GFX_PA(FinalCompositeProducer)
 
+DECLARE_GFX_PA(IrradianceFieldVisualizationProducer)
+
 #if ETH_TOOLMODE
 DECLARE_GFX_PA(EditorGridProducer)
 DECLARE_GFX_PA(EditorOutlineProducer)
@@ -69,13 +74,14 @@ Ether::Graphics::FrameScheduler::FrameScheduler()
 {
     Register(ACCESS_GFX_PA(GBufferProducer), new GBufferProducer());
     Register(ACCESS_GFX_PA(GlobalConstantsProducer), new GlobalConstantsProducer());
-    Register(ACCESS_GFX_PA(LightingCompositeProducer), new LightingCompositeProducer());
     Register(ACCESS_GFX_PA(MaterialTableProducer), new MaterialTableProducer());
     Register(ACCESS_GFX_PA(ProceduralSkyProducer), new ProceduralSkyProducer());
     Register(ACCESS_GFX_PA(RaytracingResourceProducer), new RaytracingResourceProducer());
+    Register(ACCESS_GFX_PA(IrradianceFieldProducer), new IrradianceFieldProducer());
     Register(ACCESS_GFX_PA(RaytracedLightingProducer), new RaytracedLightingProducer());
     Register(ACCESS_GFX_PA(RaytracedTranslucencyProducer), new RaytracedTranslucencyProducer());
     Register(ACCESS_GFX_PA(PathtracedLightingProducer), new PathtracedLightingProducer());
+    Register(ACCESS_GFX_PA(LightingCompositeProducer), new LightingCompositeProducer());
     Register(ACCESS_GFX_PA(TranslucencyProducer), new TranslucencyProducer());
 
     Register(ACCESS_GFX_PA(PostFxSourceProducer), new PostFxSourceProducer());
@@ -84,6 +90,8 @@ Ether::Graphics::FrameScheduler::FrameScheduler()
     Register(ACCESS_GFX_PA(TemporalAAProducer), new TemporalAAProducer());
     Register(ACCESS_GFX_PA(FinalCompositeProducer), new FinalCompositeProducer());
 
+    Register(ACCESS_GFX_PA(IrradianceFieldVisualizationProducer), new IrradianceFieldVisualizationProducer());
+
 #if ETH_TOOLMODE
     Register(ACCESS_GFX_PA(EditorGridProducer), new EditorGridProducer());
     Register(ACCESS_GFX_PA(EditorOutlineProducer), new EditorOutlineProducer());
@@ -101,6 +109,7 @@ Ether::Graphics::FrameScheduler::~FrameScheduler()
     ACCESS_GFX_PA(MaterialTableProducer).Release();
     ACCESS_GFX_PA(ProceduralSkyProducer).Release();
     ACCESS_GFX_PA(RaytracingResourceProducer).Release();
+    ACCESS_GFX_PA(IrradianceFieldProducer).Release();
     ACCESS_GFX_PA(RaytracedLightingProducer).Release();
     ACCESS_GFX_PA(PathtracedLightingProducer).Release();
     ACCESS_GFX_PA(TranslucencyProducer).Release();
@@ -112,6 +121,8 @@ Ether::Graphics::FrameScheduler::~FrameScheduler()
     ACCESS_GFX_PA(TemporalAAProducer).Release();
     ACCESS_GFX_PA(FinalCompositeProducer).Release();
 
+    ACCESS_GFX_PA(IrradianceFieldVisualizationProducer).Release();
+
 #if ETH_TOOLMODE
     ACCESS_GFX_PA(EditorGridProducer).Release();
     ACCESS_GFX_PA(EditorOutlineProducer).Release();
@@ -182,6 +193,7 @@ void Ether::Graphics::FrameScheduler::BuildSchedule()
     m_OrderedProducers.push(ACCESS_GFX_PA(MaterialTableProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(ProceduralSkyProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(RaytracingResourceProducer).Get());
+    m_OrderedProducers.push(ACCESS_GFX_PA(IrradianceFieldProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(GBufferProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(RaytracedLightingProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(PathtracedLightingProducer).Get());
@@ -198,6 +210,9 @@ void Ether::Graphics::FrameScheduler::BuildSchedule()
     // TODO: Add a tonemapping pass instead of dumping it in final composite, and move it before TAA
     m_OrderedProducers.push(ACCESS_GFX_PA(FinalCompositeProducer).Get());
 
+    // Debug Visualizers:
+    m_OrderedProducers.push(ACCESS_GFX_PA(IrradianceFieldVisualizationProducer).Get());
+
 #if ETH_TOOLMODE
     m_OrderedProducers.push(ACCESS_GFX_PA(EditorGridProducer).Get());
     m_OrderedProducers.push(ACCESS_GFX_PA(EditorOutlineProducer).Get());