Screen space reflection with hierarchical ray tracer #94

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fall2019 wants to merge 50 commits into master from screen_space_ray_tracing

README.md

-Original file line number
+Diff line change
@@ Expand Up / @@ -7,7 +7,7 @@ @@
     <!-- soon! [![Documentation](https://codedocs.xyz/MomoDeve/MxEngine.svg)](https://codedocs.xyz/MomoDeve/MxEngine/) -->
     MxEngine is an educational modern-C++ general-purpose 3D game engine.
-    Right now MxEngine is developed only by me, [#Momo](https://github.com/MomoDeve), but any contributions are welcome and will be reviewed.
+    Right now MxEngine is developed only by me, [#Momo](https://github.com/MomoDeve) and [#Lucas](https://github.com/fall2019) contributing some features from time to time. Any contributions are welcome and will be reviewed.
     Fow now MxEngine supports OpenGL as graphic API and targets x64 only. I develop the project in my free time, so updates may be not so frequent!
     ***Note:** MxEngine is currently being ported to new Vulkan rendering backend. Development progress of the rendering library can be found here: [VulkanAbstractionLayer](https://github.com/asc-community/VulkanAbstractionLayer)*
@@ Expand Down Expand Up @@
     <i>shadow casting from dynamic lights, screen-space reflections</i>
     </p>
-    ## Special thanks
-    #### God Ray Effect by [#Fall2019](https://github.com/fall2019)
     <img src="preview_images/readme_god_ray.PNG">
+    <i>god ray effect</i>
     </p>
     ## Projects based on MxEngine
@@ Expand Down @@

src/Core/Components/Camera/CameraController.cpp

-Original file line number
+Diff line change
@@ Expand Up / @@ -27,6 +27,7 @@ @@
     // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     #include "CameraController.h"
+    #include "Utilities/Format/Format.h"
     #include "Core/Events/WindowResizeEvent.h"
     #include "Core/Config/GlobalConfig.h"
     #include "Core/Application/Event.h"
@@ Expand Down Expand Up / @@ -425,11 +426,26 @@ namespace MxEngine @@
             return this->renderBuffers->Material;
         }
+        TextureHandle CameraController::GetSSRMask()const
+        {
+            return this->renderBuffers->SSRMask;
+        }
         TextureHandle CameraController::GetDepthTexture() const
         {
             return this->renderBuffers->Depth;
         }
+        const MxVector<TextureHandle>&  CameraController::GetHiZ() const
+        {
+            return this->renderBuffers->HiZ;
+        }
+        const TextureHandle& CameraController::GetPackedDepth() const
+        {
+            return this->renderBuffers->PackedDepthMap;
+        }
         TextureHandle CameraController::GetAverageWhiteTexture() const
         {
             return this->renderBuffers->AverageWhite;
@@ Expand All / @@ -456,23 +472,28 @@ namespace MxEngine @@
             this->Albedo = Factory<Texture>::Create();
             this->Normal = Factory<Texture>::Create();
             this->Material = Factory<Texture>::Create();
+            this->SSRMask = Factory<Texture>::Create();
             this->Depth = Factory<Texture>::Create();
             this->AverageWhite = Factory<Texture>::Create();
             this->HDR = Factory<Texture>::Create();
             this->SwapHDR1 = Factory<Texture>::Create();
             this->SwapHDR2 = Factory<Texture>::Create();
+            for (int i = 0; i < 4; i++)  this->HiZ.emplace_back(Factory<Texture>::Create());
+            this->PackedDepthMap = Factory<Texture>::Create();
             this->Resize(width, height);
             this->GBuffer->AttachTexture(this->Albedo, Attachment::COLOR_ATTACHMENT0);
             this->GBuffer->AttachTextureExtra(this->Normal, Attachment::COLOR_ATTACHMENT1);
             this->GBuffer->AttachTextureExtra(this->Material, Attachment::COLOR_ATTACHMENT2);
+            this->GBuffer->AttachTextureExtra(this->SSRMask, Attachment::COLOR_ATTACHMENT3);
             this->GBuffer->AttachTextureExtra(this->Depth, Attachment::DEPTH_ATTACHMENT);
             std::array attachments = {
                 Attachment::COLOR_ATTACHMENT0,
                 Attachment::COLOR_ATTACHMENT1,
                 Attachment::COLOR_ATTACHMENT2,
+                Attachment::COLOR_ATTACHMENT3
             };
             this->GBuffer->UseDrawBuffers(attachments);
             this->GBuffer->Validate();
@@ Expand All / @@ -493,10 +514,29 @@ namespace MxEngine @@
             this->Material->SetInternalEngineTag(MXENGINE_MAKE_INTERNAL_TAG("camera material"));
             this->Material->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
+            this->SSRMask->Load(nullptr, width, height, 1, false, TextureFormat::R32F);
+            this->SSRMask->SetInternalEngineTag(MXENGINE_MAKE_INTERNAL_TAG("ssr mask"));
+            this->SSRMask->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
             this->Depth->LoadDepth(width, height, TextureFormat::DEPTH32F);
             this->Depth->SetInternalEngineTag(MXENGINE_MAKE_INTERNAL_TAG("camera depth"));
             this->Depth->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
+            for (int i = 0; i < this->HiZ.size(); i++)
+            {
+                int scale = 1 << (i + 1);
+                MxString tag = MxFormat("!camera depth lv{}", i + 1);
+                int w = width / scale;
+                int h = height / scale;
+                this->HiZ[i]->Load(nullptr, w, h, 1, false, TextureFormat::R32F);
+                this->HiZ[i]->SetInternalEngineTag(tag);
+                this->HiZ[i]->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
+            }
+        	this->PackedDepthMap->Load(nullptr, width, height * 1.5, 1, false, TextureFormat::R32F);
+            this->PackedDepthMap->SetInternalEngineTag(MXENGINE_MAKE_INTERNAL_TAG("packed depth map"));
+            this->PackedDepthMap->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
             this->AverageWhite->Load(nullptr, 1, 1, 3, false, TextureFormat::RGBA16F);
             this->AverageWhite->SetInternalEngineTag(MXENGINE_MAKE_INTERNAL_TAG("camera white"));
             this->AverageWhite->SetWrapType(TextureWrap::CLAMP_TO_EDGE);
@@ Expand All / @@ -520,10 +560,14 @@ namespace MxEngine @@
             Factory<Texture>::Destroy(this->Albedo);
             Factory<Texture>::Destroy(this->Normal);
             Factory<Texture>::Destroy(this->Material);
+            Factory<Texture>::Destroy(this->SSRMask);
             Factory<Texture>::Destroy(this->Depth);
             Factory<Texture>::Destroy(this->HDR);
             Factory<Texture>::Destroy(this->SwapHDR1);
             Factory<Texture>::Destroy(this->SwapHDR2);
+            for (auto& it : this->HiZ)
+                Factory<Texture>::Destroy(it);
+            Factory<Texture>::Destroy(this->PackedDepthMap);
         }
         MXENGINE_REFLECT_TYPE
@@ Expand Down @@

src/Core/Components/Camera/CameraController.h

-Original file line number
+Diff line change
@@ Expand Up / @@ -49,6 +49,9 @@ namespace MxEngine @@
             TextureHandle Normal;
             TextureHandle Material;
             TextureHandle Depth;
+            TextureHandle SSRMask;
+            MxVector<TextureHandle> HiZ;
+            TextureHandle PackedDepthMap;
             TextureHandle AverageWhite;
             TextureHandle HDR;
             TextureHandle SwapHDR1;
@@ Expand Down Expand Up / @@ -130,7 +133,10 @@ namespace MxEngine @@
             TextureHandle GetAlbedoTexture() const;
             TextureHandle GetNormalTexture() const;
             TextureHandle GetMaterialTexture() const;
+            TextureHandle GetSSRMask()const;
             TextureHandle GetDepthTexture() const;
+            const MxVector<TextureHandle>& GetHiZ() const;
+            const TextureHandle& GetPackedDepth() const;
             TextureHandle GetAverageWhiteTexture() const;
             TextureHandle GetHDRTexture() const;
             TextureHandle GetSwapHDRTexture1() const;
@@ Expand Down @@

src/Core/Components/Camera/CameraSSR.cpp

            
                      Original file line number
                      Diff line number
                      Diff line change
                  
    @@ -37,31 +37,31 @@ namespace MxEngine
  
            return this->thickness;

        }

        size_t CameraSSR::GetSteps() const

        void CameraSSR::SetThickness(float thickness)

        {

            return this->steps;

            this->thickness = Max(thickness, 1.0f);

        }

        float CameraSSR::GetStartDistance() const

        int CameraSSR::GetMaxLevel() const

        {

            return this->startDistance;

            return this->maxLevel;

        }

        void CameraSSR::SetThickness(float thickness)

        void CameraSSR::SetMaxLevel(int level) 

        {

            this->thickness = Max(thickness, 0.0f);

            this->maxLevel = Clamp(level,1,4);

        }

        void CameraSSR::SetSteps(size_t steps)

        int CameraSSR::GetMaxStep()const

        {

            this->steps = steps;

            return this->maxStep;

        }

        void CameraSSR::SetStartDistance(float distance)

        void CameraSSR::SetMaxStep(int step)

        {

            this->startDistance = Max(distance, 0.0f);

            this->maxStep = Clamp(step,150,255);

        }

        MXENGINE_REFLECT_TYPE

        {

            rttr::registration::class_<CameraSSR>("CameraSSR")

    @@ -72,19 +72,19 @@ namespace MxEngine
  
                .property("thickness", &CameraSSR::GetThickness, &CameraSSR::SetThickness)

                (

                    rttr::metadata(MetaInfo::FLAGS, MetaInfo::SERIALIZABLE | MetaInfo::EDITABLE),

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 0.0f, 10000.0f }),

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 0.5f, 20.0f }),

                    rttr::metadata(EditorInfo::EDIT_PRECISION, 0.01f)

                )

                .property("steps", &CameraSSR::GetSteps, &CameraSSR::SetSteps)

                .property("max level", &CameraSSR::GetMaxLevel, &CameraSSR::SetMaxLevel)

                (

                    rttr::metadata(MetaInfo::FLAGS, MetaInfo::SERIALIZABLE | MetaInfo::EDITABLE),

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 0.0f, 128.0f }),

                    rttr::metadata(EditorInfo::EDIT_PRECISION, 0.1f)

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 1, 4 }),

                    rttr::metadata(EditorInfo::EDIT_PRECISION, 1)

                )

                .property("start distance", &CameraSSR::GetStartDistance, &CameraSSR::SetStartDistance)

                .property("maxStep", &CameraSSR::GetMaxStep, &CameraSSR::SetMaxStep)

                (

                    rttr::metadata(MetaInfo::FLAGS, MetaInfo::SERIALIZABLE | MetaInfo::EDITABLE),

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 0.0f, 10000000.0f }),

                    rttr::metadata(EditorInfo::EDIT_RANGE, Range { 150, 255 }),

                    rttr::metadata(EditorInfo::EDIT_PRECISION, 0.01f)

                );

        }

src/Core/Components/Camera/CameraSSR.h

            
                      Original file line number
                      Diff line number
                      Diff line change
                  
    @@ -36,18 +36,20 @@ namespace MxEngine
  
        {

            MAKE_COMPONENT(CameraSSR);

            float thickness = 0.5f;

            size_t steps = 10;

            float startDistance = 2.0f;

            float thickness = 1.5f;

            int maxLevel = 2;

            int maxStep = 150;

        public:

            CameraSSR() = default;

            float GetThickness() const;

            size_t GetSteps() const;

            float GetStartDistance() const;

            int GetMaxLevel()const;

            int GetMaxStep()const;

            void SetThickness(float thickness);

            void SetSteps(size_t steps);

            void SetStartDistance(float distance);

            void SetMaxLevel(int level);

            void SetMaxStep(int step);

        };

    }

src/Core/Rendering/RenderAdaptor.cpp

-Original file line number
+Diff line change
@@ Expand Up / @@ -143,6 +143,11 @@ namespace MxEngine @@
                 shaderFolder / "gbuffer_fragment.glsl"
             );
+            environment.Shaders["HIZ"_id] = AssetManager::LoadShader(
+                shaderFolder / "rect_vertex.glsl",
+                shaderFolder / "hierarchical_depth_buffer_generator.glsl"
+            );
             environment.Shaders["GBufferMask"_id] = AssetManager::LoadShader(
                 shaderFolder / "gbuffer_vertex.glsl",
                 shaderFolder / "gbuffer_mask_fragment.glsl"
@@ Expand Down @@

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