diff --git a/include/Engine/Rendering/DrawColorCorrectionPass.h b/include/Engine/Rendering/DrawColorCorrectionPass.h index 231e2d33..db16cf98 100644 --- a/include/Engine/Rendering/DrawColorCorrectionPass.h +++ b/include/Engine/Rendering/DrawColorCorrectionPass.h @@ -17,7 +17,7 @@ public: void InitializeFrameBuffers(); void InitializeShaderPrograms(); - void Draw(GLuint sceneTexture, GLuint bloomTexture, GLuint sceneTextureLowRes, GLuint bloomTextureLowRes, GLfloat gamma, GLfloat exposure); + void Draw(GLuint sceneTexture, GLuint bloomTexture, GLuint sceneTextureLowRes, GLuint bloomTextureLowRes, GLuint SSAOTexture, GLfloat gamma, GLfloat exposure); private: const IRenderer* m_Renderer; diff --git a/include/Engine/Rendering/DrawFinalPass.h b/include/Engine/Rendering/DrawFinalPass.h index bf8d4d76..f1cf66c8 100644 --- a/include/Engine/Rendering/DrawFinalPass.h +++ b/include/Engine/Rendering/DrawFinalPass.h @@ -21,6 +21,9 @@ public: void Draw(RenderScene& scene); void ClearBuffer(); + //Return the texture that is used in later stages to apply the bloom effect + GLuint DepthBuffer() const { return m_DepthBuffer; } + Camera* DepthBufferCamera() const { return RenderCamera; } //Return the texture that is used in later stages to apply the bloom effect GLuint BloomTexture() const { return m_BloomTexture; } GLuint BloomTextureLowRes() const { return m_BloomTextureLowRes; } @@ -62,6 +65,7 @@ private: GLuint m_SceneTextureLowRes; GLuint m_DepthBuffer; GLuint m_DepthBufferLowRes; + Camera* RenderCamera; //maqke this component based i guess? GLuint m_ShieldPixelRate = 16; diff --git a/include/Engine/Rendering/Renderer.h b/include/Engine/Rendering/Renderer.h index 04754514..b613ba4f 100644 --- a/include/Engine/Rendering/Renderer.h +++ b/include/Engine/Rendering/Renderer.h @@ -16,6 +16,7 @@ #include "DrawScreenQuadPass.h" #include "DrawBloomPass.h" #include "DrawColorCorrectionPass.h" +#include "SSAOPass.h" #include "../Core/EventBroker.h" #include "ImGuiRenderPass.h" #include "Camera.h" @@ -50,6 +51,9 @@ private: Model* m_UnitSphere; int m_DebugTextureToDraw = 0; + float m_SSAO_Radius = 0.2f; + float m_SSAO_Bias = 0.012f; + float m_SSAO_Intensity = 1.0f; PickingPass* m_PickingPass; LightCullingPass* m_LightCullingPass; @@ -58,6 +62,7 @@ private: DrawScreenQuadPass* m_DrawScreenQuadPass; DrawBloomPass* m_DrawBloomPass; DrawColorCorrectionPass* m_DrawColorCorrectionPass; + SSAOPass* m_SSAOPass; //----------------------Functions----------------------// void InitializeWindow(); diff --git a/include/Engine/Rendering/SSAOPass.h b/include/Engine/Rendering/SSAOPass.h new file mode 100644 index 00000000..22f53ded --- /dev/null +++ b/include/Engine/Rendering/SSAOPass.h @@ -0,0 +1,58 @@ +#ifndef SSAOPass_h__ +#define SSAOPass_h__ + +#include "IRenderer.h" +#include "SSAOPassState.h" +//#include "LightCullingPass.h" Finalpass om den skall skickas in +#include "FrameBuffer.h" +#include "ShaderProgram.h" +#include "DrawBloomPass.h" +//#include "Util/UnorderedMapVec2.h" +#include "Texture.h" + +class SSAOPass +{ +public: + SSAOPass(IRenderer* rendere); + ~SSAOPass() { }; + + void Draw(GLuint depthBuffer, Camera* camera); + void Setting(float radius, float bias, float intensity); + void ClearBuffer(); + + //Return the SSAO of the texture sent to Draw + GLuint SSAOTexture() const { return m_DrawBloomPass->GaussianTexture(); } + +private: + void InitializeTexture(); + void InitializeFrameBuffer(); + void InitializeShaderProgram(); + void InitializeBuffer(); + + void GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const; + + void ComputeAO(GLuint depthBuffer, Camera* camera); + //void blurHorizontal(GLuint depthBuffer); + //void blurVertical(GLuint depthBuffer); + + Model* m_ScreenQuad; + + const IRenderer* m_Renderer; + + float m_Radius; + float m_Bias; + float m_Intensity; + + GLuint m_SSAOTexture; + FrameBuffer m_SSAOFramBuffer; + + GLuint m_SSAOViewSpaceZTexture; + FrameBuffer m_SSAOViewSpaceZFramBuffer; + + ShaderProgram* m_SSAOProgram; + ShaderProgram* m_SSAOViewSpaceZProgram; + + DrawBloomPass* m_DrawBloomPass; +}; + +#endif \ No newline at end of file diff --git a/include/Engine/Rendering/SSAOPassState.h b/include/Engine/Rendering/SSAOPassState.h new file mode 100644 index 00000000..115fdcf7 --- /dev/null +++ b/include/Engine/Rendering/SSAOPassState.h @@ -0,0 +1,15 @@ +#ifndef SSAOPassState_h__ +#define SSAOPassState_h__ + +#include "Rendering/RenderState.h" + +class SSAOPassState : public RenderState +{ +public: + SSAOPassState(); + ~SSAOPassState(); +private: + +}; + +#endif \ No newline at end of file diff --git a/resources/Shaders/DrawColorCorrection.frag.glsl b/resources/Shaders/DrawColorCorrection.frag.glsl index 76db3e82..838a78f6 100644 --- a/resources/Shaders/DrawColorCorrection.frag.glsl +++ b/resources/Shaders/DrawColorCorrection.frag.glsl @@ -4,6 +4,7 @@ layout (binding = 0) uniform sampler2D SceneTexture; layout (binding = 1) uniform sampler2D BloomTexture; layout (binding = 2) uniform sampler2D SceneTextureLowRes; layout (binding = 3) uniform sampler2D BloomTextureLowRes; +layout (binding = 4) uniform sampler2D SSAOTexture; uniform float Exposure; uniform float Gamma; @@ -19,6 +20,10 @@ void main() vec4 bloomColor = texture(BloomTexture, Input.TextureCoordinate); vec4 hdrColorLowRes = texture(SceneTextureLowRes, Input.TextureCoordinate); vec4 bloomColorLowRes = texture(BloomTextureLowRes, Input.TextureCoordinate); + vec4 SSAO = texture(SSAOTexture, Input.TextureCoordinate); + + //hdrColor = hdrColor * SSAO; + SSAO = clamp(SSAO, 0.1f, 1.0f); hdrColor += bloomColor; hdrColorLowRes; @@ -33,7 +38,7 @@ void main() //gamme correction result = pow(result, vec3(1.0 / Gamma)); - + result = result * SSAO.rgb; fragmentColor = vec4(result, 1.0); //fragmentColor = hdrColor; //fragmentColor = bloomColor; diff --git a/resources/Shaders/SSAO.frag.glsl b/resources/Shaders/SSAO.frag.glsl new file mode 100644 index 00000000..b9ba58ce --- /dev/null +++ b/resources/Shaders/SSAO.frag.glsl @@ -0,0 +1,106 @@ +#version 430 + +//Number of samples per pixel +#define NUM_SAMPLES (24) + +//Number of turns around the cirle +#define NUM_TURNS (7) + +uniform sampler2D ViewSpaceZ; + +uniform vec4 ProjInfo; + +uniform float ProjScale; +//#define ProjScale 500 + +uniform float Radius; +//#define Radius 1.0f + +uniform float Bias; +//#define Bias 0.012f + +uniform float IntensityDivR6; +//#define IntensityDivR6 1 + +out vec4 fragmentColor; + +vec3 reconstructVSPosition(vec2 ScreenSpaceCoord, float z){ + return vec3((ScreenSpaceCoord * ProjInfo.xy + ProjInfo.zw) * z, z); +} + +vec3 getPosition(ivec2 ScreenSpaceCoord) { + vec3 P; + P.z = texelFetch(ViewSpaceZ, ScreenSpaceCoord, 0).r; + //Get the xy view space coordinates and add the z value from ViewSpaceZ buffer. + return reconstructVSPosition(vec2(ScreenSpaceCoord) + vec2(0.5), P.z); +} + +vec3 getVSFaceNormal(vec3 ViewSpacePosition) { + // Get tangets vector for the plane and ViewSpacePositin... don't ask how this functions works. It's pure magic. + // They do this and it just works... I would guess that they approximate the function of a plane from pixels close to the pixel were on now. + return normalize(cross(dFdx(ViewSpacePosition), dFdy(ViewSpacePosition))); +} + + +vec3 getSampleViewSpacePos(ivec2 ScreenSpaceCoord, int SampleIndex, float RotationAngle, float ScreenSpaceSampleRadius){ + // Pure Magic... + float alpha = float(SampleIndex + 0.5) * (1.0 / NUM_SAMPLES); + + // Angle to where to sample + float angle = alpha * (NUM_TURNS * 6.28) + RotationAngle; + + //Lenght to were to sample + ScreenSpaceSampleRadius = ScreenSpaceSampleRadius * alpha; + + vec2 screenSpaceSampleOffsetVecor = vec2(cos(angle), sin(angle)); + + // Get texel coordinate on where to sample by going screenSpaceSampleOffsetVecor direction in ScreenSpaceSampleRadius units from ScreenSpaceCoord (the point being shaded); + ivec2 screenSpaceSampleTexel = ivec2(ScreenSpaceSampleRadius * screenSpaceSampleOffsetVecor) + ScreenSpaceCoord; + + return getPosition(screenSpaceSampleTexel); +} + +float Radius2 = Radius * Radius; + +float sampleAO(ivec2 ScreenSpaceCoord, vec3 ShadedViewSpacePosition, vec3 ViewSpaceNormal, float ScreenSpaceSampleRadius, int SampleIndex, float RotationAngle) { + vec3 sampleViewSpacePosition = getSampleViewSpacePos(ScreenSpaceCoord, SampleIndex, RotationAngle, ScreenSpaceSampleRadius); + + vec3 sampleVector = ShadedViewSpacePosition - sampleViewSpacePosition; + + // vv = sampleVectorLenght ^ 2 + float vv = dot(sampleVector, sampleVector); + // vn = angle between sampleVector and Normal + float vn = dot(sampleVector, ViewSpaceNormal); + + const float epsilon = 0.01f; + + // vv < radius2 if the vector is shorter then the radius; + // vn - bias, offset the angle to reduse self occlusion. + // epsilon is here to make divison by 0 impossible. + return float(vv < Radius2) * max((vn - Bias) / (epsilon + vv), 0.0); + //float f = max(Radius2 - vv, 0.0); + //return f * f * f * max((vn - Bias) / (epsilon + vv), 0.0); +} + + +void main() { + ivec2 originScreenCoord = ivec2(gl_FragCoord.xy); + + vec3 origin = getPosition(originScreenCoord); + + vec3 viewSpaceNormal = getVSFaceNormal(origin); + + float screenSpaceSampleRadius = ProjScale * Radius / origin.z; + + //Offset on what angle to start on so that not evry pixel start sampling in the same direction, AlchemyAO + float rotationAngleOffset = (3 * originScreenCoord.x ^ originScreenCoord.y + originScreenCoord.x * originScreenCoord.y) * 10; + + float sum = 0.0; + for (int i = 0; i < NUM_SAMPLES; i++) { + sum += sampleAO(originScreenCoord, origin, viewSpaceNormal, screenSpaceSampleRadius, i, rotationAngleOffset); + } + + float A = max(0.0, 1.0 - sum * (2.0f / NUM_SAMPLES)); + //fragmentColor= vec4(viewSpaceNormal, 1.0f); + fragmentColor = vec4(A, A, A, 1.0f); +} diff --git a/resources/Shaders/SSAO.vert.glsl b/resources/Shaders/SSAO.vert.glsl new file mode 100644 index 00000000..a019c5ef --- /dev/null +++ b/resources/Shaders/SSAO.vert.glsl @@ -0,0 +1,8 @@ +#version 430 + +layout (location = 0) in vec3 Position; + +void main() +{ + gl_Position = vec4(Position, 1.0); +} \ No newline at end of file diff --git a/resources/Shaders/SSAOViewSpaceZ.frag.glsl b/resources/Shaders/SSAOViewSpaceZ.frag.glsl new file mode 100644 index 00000000..e4ec491b --- /dev/null +++ b/resources/Shaders/SSAOViewSpaceZ.frag.glsl @@ -0,0 +1,14 @@ +#version 430 + +uniform sampler2D DepthBuffer; +uniform vec3 ClipInfo; + +//out float depthLinear; +//Just for Debug, should be depthLinear +out vec4 fragmentColor; +void main() { + float depthSample = texelFetch(DepthBuffer, ivec2(gl_FragCoord.xy), 0).r; + float depthLinear = ClipInfo[0] / (ClipInfo[1] * depthSample + ClipInfo[2]); + //float depthLinear = (NearClip) / ( -depthSample + 1.0f); + fragmentColor = vec4(depthLinear, depthLinear, depthLinear, 1.0f); +} \ No newline at end of file diff --git a/src/Engine/Rendering/DrawBloomPass.cpp b/src/Engine/Rendering/DrawBloomPass.cpp index 46612d5e..e12ebd91 100644 --- a/src/Engine/Rendering/DrawBloomPass.cpp +++ b/src/Engine/Rendering/DrawBloomPass.cpp @@ -19,16 +19,20 @@ void DrawBloomPass::InitializeTextures() void DrawBloomPass::InitializeShaderPrograms() { m_GaussianProgram_horiz = ResourceManager::Load("##GaussianProgramHoriz"); - m_GaussianProgram_horiz->AddShader(std::shared_ptr(new VertexShader("Shaders/Gaussian_horiz.vert.glsl"))); - m_GaussianProgram_horiz->AddShader(std::shared_ptr(new FragmentShader("Shaders/Gaussian_horiz.frag.glsl"))); - m_GaussianProgram_horiz->Compile(); - m_GaussianProgram_horiz->Link(); + if (m_GaussianProgram_horiz->GetHandle() == 0) { + m_GaussianProgram_horiz->AddShader(std::shared_ptr(new VertexShader("Shaders/Gaussian_horiz.vert.glsl"))); + m_GaussianProgram_horiz->AddShader(std::shared_ptr(new FragmentShader("Shaders/Gaussian_horiz.frag.glsl"))); + m_GaussianProgram_horiz->Compile(); + m_GaussianProgram_horiz->Link(); + } - m_GaussianProgram_vert = ResourceManager::Load("##GaussianProgramVert"); - m_GaussianProgram_vert->AddShader(std::shared_ptr(new VertexShader("Shaders/Gaussian_vert.vert.glsl"))); - m_GaussianProgram_vert->AddShader(std::shared_ptr(new FragmentShader("Shaders/Gaussian_vert.frag.glsl"))); - m_GaussianProgram_vert->Compile(); - m_GaussianProgram_vert->Link(); + m_GaussianProgram_vert = ResourceManager::Load("##GaussianProgramVert"); + if (m_GaussianProgram_vert->GetHandle() == 0) { + m_GaussianProgram_vert->AddShader(std::shared_ptr(new VertexShader("Shaders/Gaussian_vert.vert.glsl"))); + m_GaussianProgram_vert->AddShader(std::shared_ptr(new FragmentShader("Shaders/Gaussian_vert.frag.glsl"))); + m_GaussianProgram_vert->Compile(); + m_GaussianProgram_vert->Link(); + } } @@ -70,16 +74,18 @@ void DrawBloomPass::Draw(GLuint texture) //Horizontal pass, first use the given texture then save it to the horizontal framebuffer. m_GaussianFrameBuffer_horiz.Bind(); + GLERROR("m_GaussianFrameBuffer_horiz.Bind()"); m_GaussianProgram_horiz->Bind(); - + GLERROR("m_GaussianProgram_horiz->Bind()"); glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture); - + GLERROR("glBindTexture"); glBindVertexArray(m_ScreenQuad->VAO); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer); + GLERROR("GL_ELEMENT_ARRAY_BUFFER"); glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex +1 , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex); - + GLERROR("HEJ"); //Iterate some times to make it more gaussian. for (int i = 1; i < m_iterations; i++) { //Vertical pass @@ -92,7 +98,7 @@ void DrawBloomPass::Draw(GLuint texture) glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer); glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex +1 , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex); - + GLERROR("HEJ LOOP"); //horizontal pass m_GaussianFrameBuffer_horiz.Bind(); @@ -112,7 +118,7 @@ void DrawBloomPass::Draw(GLuint texture) m_GaussianProgram_vert->Bind(); glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz); - + GLERROR("GL_TEXTURE_2D"); glBindVertexArray(m_ScreenQuad->VAO); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer); glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex +1 diff --git a/src/Engine/Rendering/DrawColorCorrectionPass.cpp b/src/Engine/Rendering/DrawColorCorrectionPass.cpp index c82d614f..620bd896 100644 --- a/src/Engine/Rendering/DrawColorCorrectionPass.cpp +++ b/src/Engine/Rendering/DrawColorCorrectionPass.cpp @@ -18,7 +18,7 @@ void DrawColorCorrectionPass::InitializeShaderPrograms() m_ColorCorrectionProgram->Link(); } -void DrawColorCorrectionPass::Draw(GLuint sceneTexture, GLuint bloomTexture, GLuint sceneTextureLowRes, GLuint bloomTextureLowRes, GLfloat gamma, GLfloat exposure) +void DrawColorCorrectionPass::Draw(GLuint sceneTexture, GLuint bloomTexture, GLuint sceneTextureLowRes, GLuint bloomTextureLowRes, GLuint SSAOTexture, GLfloat gamma, GLfloat exposure) { //glBindFramebuffer(GL_FRAMEBUFFER, 0); GLERROR("DrawScreenQuadPass::Draw: Pre"); @@ -37,6 +37,8 @@ void DrawColorCorrectionPass::Draw(GLuint sceneTexture, GLuint bloomTexture, GLu glBindTexture(GL_TEXTURE_2D, sceneTextureLowRes); glActiveTexture(GL_TEXTURE3); glBindTexture(GL_TEXTURE_2D, bloomTextureLowRes); + glActiveTexture(GL_TEXTURE4); + glBindTexture(GL_TEXTURE_2D, SSAOTexture); glBindVertexArray(m_ScreenQuad->VAO); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer); diff --git a/src/Engine/Rendering/DrawFinalPass.cpp b/src/Engine/Rendering/DrawFinalPass.cpp index 11db71f0..a2681c65 100644 --- a/src/Engine/Rendering/DrawFinalPass.cpp +++ b/src/Engine/Rendering/DrawFinalPass.cpp @@ -22,10 +22,21 @@ void DrawFinalPass::InitializeTextures() void DrawFinalPass::InitializeFrameBuffers() { - glGenRenderbuffers(1, &m_DepthBuffer); + + glGenTextures(1, &m_DepthBuffer); + + glBindTexture(GL_TEXTURE_2D, m_DepthBuffer); + glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, (int)(m_Renderer->GetViewportSize().Width), (int)(m_Renderer->GetViewportSize().Height), 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); + + /*glGenRenderbuffers(1, &m_DepthBuffer); glBindRenderbuffer(GL_RENDERBUFFER, m_DepthBuffer); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height); - GLERROR("RenderBuffer generation"); + GLERROR("RenderBuffer generation");*/ + GenerateTexture(&m_SceneTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT); //GenerateTexture(&m_BloomTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewPortSize().Width, m_Renderer->GetViewPortSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT); @@ -33,7 +44,7 @@ void DrawFinalPass::InitializeFrameBuffers() //GenerateMipMapTexture(&m_BloomTexture, GL_CLAMP_TO_EDGE, glm::vec2(m_Renderer->GetViewPortSize().Width, m_Renderer->GetViewPortSize().Height), GL_RGB16F, GL_FLOAT, 4); //GenerateTexture(&m_StencilTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_STENCIL, GL_STENCIL_INDEX8, GL_INT); - m_FinalPassFrameBuffer.AddResource(std::shared_ptr(new RenderBuffer(&m_DepthBuffer, GL_DEPTH_STENCIL_ATTACHMENT))); + m_FinalPassFrameBuffer.AddResource(std::shared_ptr(new Texture2D(&m_DepthBuffer, GL_DEPTH_STENCIL_ATTACHMENT))); //m_FinalPassFrameBuffer.AddResource(std::shared_ptr(new Texture2D(&m_StencilTexture, GL_STENCIL_ATTACHMENT))); m_FinalPassFrameBuffer.AddResource(std::shared_ptr(new Texture2D(&m_SceneTexture, GL_COLOR_ATTACHMENT0))); m_FinalPassFrameBuffer.AddResource(std::shared_ptr(new Texture2D(&m_BloomTexture, GL_COLOR_ATTACHMENT1))); @@ -176,10 +187,12 @@ void DrawFinalPass::InitializeShaderPrograms() void DrawFinalPass::Draw(RenderScene& scene) { GLERROR("Pre"); - + RenderCamera = scene.Camera; DrawFinalPassState* state = new DrawFinalPassState(m_FinalPassFrameBuffer.GetHandle()); if (scene.ClearDepth) { - glClear(GL_DEPTH_BUFFER_BIT); + //glClear(GL_DEPTH_BUFFER_BIT); + state->Disable(GL_DEPTH_TEST); + state->DepthMask(GL_FALSE); } //TODO: Do we need check for this or will it be per scene always? glClearStencil(0x00); @@ -241,7 +254,7 @@ void DrawFinalPass::Draw(RenderScene& scene) DrawShieldToStencilBuffer(scene.Jobs.ShieldObjects, scene); GLERROR("StencilPass"); - glClear(GL_DEPTH_BUFFER_BIT); + //glClear(GL_DEPTH_BUFFER_BIT); stateLowRes->Enable(GL_DEPTH_TEST); stateLowRes->StencilFunc(GL_LEQUAL, 1, 0xFF); @@ -743,17 +756,26 @@ void DrawFinalPass::BindExplosionUniforms(GLuint shaderHandle, std::shared_ptr& job, RenderScene& scene) { - GLERROR("Bind 1 uniform"); - GLint Location_M = glGetUniformLocation(shaderHandle, "M"); - glUniformMatrix4fv(Location_M, 1, GL_FALSE, glm::value_ptr(job->Matrix)); - GLERROR("Bind 2 uniform"); - GLint Location_V = glGetUniformLocation(shaderHandle, "V"); - glUniformMatrix4fv(Location_V, 1, GL_FALSE, glm::value_ptr(scene.Camera->ViewMatrix())); - GLERROR("Bind 3 uniform"); - GLint Location_P = glGetUniformLocation(shaderHandle, "P"); - glUniformMatrix4fv(Location_P, 1, GL_FALSE, glm::value_ptr(scene.Camera->ProjectionMatrix())); - GLERROR("Bind 4 uniform"); - + if (1/*job->Model->IsSkinned()*/) { + GLERROR("Bind 1 uniform"); + GLint Location_M = glGetUniformLocation(shaderHandle, "M"); + glUniformMatrix4fv(Location_M, 1, GL_FALSE, glm::value_ptr(job->Matrix)); + GLERROR("Bind 2 uniform"); + GLint Location_V = glGetUniformLocation(shaderHandle, "V"); + glUniformMatrix4fv(Location_V, 1, GL_FALSE, glm::value_ptr(scene.Camera->ViewMatrix())); + GLERROR("Bind 3 uniform"); + GLint Location_P = glGetUniformLocation(shaderHandle, "P"); + glUniformMatrix4fv(Location_P, 1, GL_FALSE, glm::value_ptr(scene.Camera->ProjectionMatrix())); + GLERROR("Bind 4 uniform"); + } else { + GLERROR("Bind 1 uniform"); + GLint Location_M = glGetUniformLocation(shaderHandle, "M"); + glUniformMatrix4fv(Location_M, 1, GL_FALSE, glm::value_ptr(job->Matrix)); + GLERROR("Bind 2 uniform"); + GLint Location_V = glGetUniformLocation(shaderHandle, "PV"); + glUniformMatrix4fv(Location_V, 1, GL_FALSE, glm::value_ptr(scene.Camera->ProjectionMatrix() * scene.Camera->ViewMatrix())); + GLERROR("Bind 3 uniform"); + } GLint Location_ScreenDimensions = glGetUniformLocation(shaderHandle, "ScreenDimensions"); glUniform2f(Location_ScreenDimensions, m_Renderer->Resolution().Width, m_Renderer->Resolution().Height); GLERROR("Bind 5 uniform"); diff --git a/src/Engine/Rendering/Renderer.cpp b/src/Engine/Rendering/Renderer.cpp index be84160c..79c935a5 100644 --- a/src/Engine/Rendering/Renderer.cpp +++ b/src/Engine/Rendering/Renderer.cpp @@ -93,7 +93,12 @@ void Renderer::Update(double dt) void Renderer::Draw(RenderFrame& frame) { - ImGui::Combo("Draw textures", &m_DebugTextureToDraw, "Final\0Scene\0Bloom\0SceneLowRes\0BloomLowRes\0Gaussian\0Picking"); + ImGui::Combo("Draw textures", &m_DebugTextureToDraw, "Final\0Scene\0Bloom\0SceneLowRes\0BloomLowRes\0Gaussian\0Picking\0SSAO"); + + ImGui::SliderFloat("SSAO sample radius", &m_SSAO_Radius, 0.0001f, 1.0f); + ImGui::SliderFloat("SSAO bias", &m_SSAO_Bias, 0.0f, 1.0f); + ImGui::SliderFloat("SSAO intensity", &m_SSAO_Intensity, 0.0f, 1.0f); + m_SSAOPass->Setting(m_SSAO_Radius, m_SSAO_Bias, m_SSAO_Intensity); //clear buffer 0 glClearColor(0.f, 0.f, 0.f, 0.f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); @@ -124,8 +129,10 @@ void Renderer::Draw(RenderFrame& frame) } m_DrawBloomPass->Draw(m_DrawFinalPass->BloomTexture()); + m_SSAOPass->Draw(m_DrawFinalPass->DepthBuffer(), m_DrawFinalPass->DepthBufferCamera()); + if (m_DebugTextureToDraw == 0) { - m_DrawColorCorrectionPass->Draw(m_DrawFinalPass->SceneTexture(), m_DrawBloomPass->GaussianTexture(), m_DrawFinalPass->SceneTextureLowRes(), m_DrawFinalPass->BloomTextureLowRes(), frame.Gamma, frame.Exposure); + m_DrawColorCorrectionPass->Draw(m_DrawFinalPass->SceneTexture(), m_DrawBloomPass->GaussianTexture(), m_DrawFinalPass->SceneTextureLowRes(), m_DrawFinalPass->BloomTextureLowRes(), m_SSAOPass->SSAOTexture(), frame.Gamma, frame.Exposure); } if (m_DebugTextureToDraw == 1) { m_DrawScreenQuadPass->Draw(m_DrawFinalPass->SceneTexture()); @@ -145,6 +152,9 @@ void Renderer::Draw(RenderFrame& frame) if (m_DebugTextureToDraw == 6) { m_DrawScreenQuadPass->Draw(m_PickingPass->PickingTexture()); } + if (m_DebugTextureToDraw == 7) { + m_DrawScreenQuadPass->Draw(m_SSAOPass->SSAOTexture()); + } m_ImGuiRenderPass->Draw(); GLERROR("Imgui draw"); @@ -191,4 +201,5 @@ void Renderer::InitializeRenderPasses() m_DrawScreenQuadPass = new DrawScreenQuadPass(this); m_DrawBloomPass = new DrawBloomPass(this); m_DrawColorCorrectionPass = new DrawColorCorrectionPass(this); + m_SSAOPass = new SSAOPass(this); } diff --git a/src/Engine/Rendering/SSAOPass.cpp b/src/Engine/Rendering/SSAOPass.cpp new file mode 100644 index 00000000..67b5cf33 --- /dev/null +++ b/src/Engine/Rendering/SSAOPass.cpp @@ -0,0 +1,135 @@ +#include "Rendering/SSAOPass.h" + +SSAOPass::SSAOPass(IRenderer* renderer) +{ + m_Renderer = renderer; + + m_ScreenQuad = ResourceManager::Load("Models/Core/ScreenQuad.mesh"); + + InitializeBuffer(); + InitializeShaderProgram(); + Setting(0.1f, 0.012f, 1.0f); + + m_DrawBloomPass = new DrawBloomPass(renderer); +} + +void SSAOPass::InitializeShaderProgram() +{ + m_SSAOProgram = ResourceManager::Load("##SSAOProgram"); + m_SSAOProgram->AddShader(std::shared_ptr(new VertexShader("Shaders/SSAO.vert.glsl"))); + m_SSAOProgram->AddShader(std::shared_ptr(new FragmentShader("Shaders/SSAO.frag.glsl"))); + m_SSAOProgram->Compile(); + m_SSAOProgram->Link(); + + m_SSAOViewSpaceZProgram = ResourceManager::Load("##SSAOViewSpaceZProgram"); + m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr(new VertexShader("Shaders/SSAO.vert.glsl"))); + m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr(new FragmentShader("Shaders/SSAOViewSpaceZ.frag.glsl"))); + m_SSAOViewSpaceZProgram->Compile(); + m_SSAOViewSpaceZProgram->Link(); +} + + +void SSAOPass::InitializeBuffer() +{ + GenerateTexture(&m_SSAOTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT); + + m_SSAOFramBuffer.AddResource(std::shared_ptr(new Texture2D(&m_SSAOTexture, GL_COLOR_ATTACHMENT0))); + m_SSAOFramBuffer.Generate(); + + GenerateTexture(&m_SSAOViewSpaceZTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB32F, GL_RGB, GL_FLOAT); + + m_SSAOViewSpaceZFramBuffer.AddResource(std::shared_ptr(new Texture2D(&m_SSAOViewSpaceZTexture, GL_COLOR_ATTACHMENT0))); + m_SSAOViewSpaceZFramBuffer.Generate(); +} + +void SSAOPass::ClearBuffer() +{ + m_SSAOFramBuffer.Bind(); + glClearColor(0.f, 0.f, 0.f, 0.f); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + m_SSAOFramBuffer.Unbind(); + + m_SSAOViewSpaceZFramBuffer.Bind(); + glClearColor(0.f, 0.f, 0.f, 0.f); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + m_SSAOViewSpaceZFramBuffer.Unbind(); +} + +void SSAOPass::Setting(float radius, float bias, float intensity) { + m_Radius = radius; + m_Bias = bias; + m_Intensity = intensity; +} + +void SSAOPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const +{ + glGenTextures(1, texture); + glBindTexture(GL_TEXTURE_2D, *texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapping); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filtering); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filtering); + glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, dimensions.x, dimensions.y, 0, format, type, nullptr); + GLERROR("Texture initialization failed"); +} + +void SSAOPass::Draw(GLuint depthBuffer, Camera* camera) +{ + SSAOPassState state; + GLuint viewSpaceZPShaderHandle = m_SSAOViewSpaceZProgram->GetHandle(); + GLuint SSAOShaderHandle = m_SSAOProgram->GetHandle(); + + m_SSAOViewSpaceZFramBuffer.Bind(); + m_SSAOViewSpaceZProgram->Bind(); + + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, depthBuffer); + glm::vec3 clipInfo = glm::vec3( + (camera->NearClip() * camera->FarClip()), + (camera->NearClip() - camera->FarClip()), + (camera->FarClip()) + ); + /*glm::vec3 clipInfo = glm::vec3( + (camera->NearClip()), + (-1.0f), + (+1.0f) + );*/ + glUniform3fv(glGetUniformLocation(viewSpaceZPShaderHandle, "ClipInfo"), 1, glm::value_ptr(clipInfo)); + + glBindVertexArray(m_ScreenQuad->VAO); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer); + glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1 + , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex); + + glm::vec4 projInfo = glm::vec4( + (-2.0f / (m_Renderer->GetViewportSize().Width * camera->ProjectionMatrix()[0][0])), + (-2.0f / (m_Renderer->GetViewportSize().Height * camera->ProjectionMatrix()[1][1])), + ((1.0f - camera->ProjectionMatrix()[0][2]) / camera->ProjectionMatrix()[0][0]), + ((1.0f - camera->ProjectionMatrix()[1][2]) / camera->ProjectionMatrix()[1][1]) + ); + + + m_SSAOFramBuffer.Bind(); + m_SSAOProgram->Bind(); + + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, m_SSAOViewSpaceZTexture); + + // How many pixel there are in a 1m long object 1m away from the camera + glUniform1f(glGetUniformLocation(SSAOShaderHandle, "ProjScale"), m_Renderer->GetViewportSize().Height / (-2.0f * glm::tan(camera->FOV() * 0.5f))); + + glUniform1f(glGetUniformLocation(SSAOShaderHandle, "Radius"), m_Radius); + glUniform1f(glGetUniformLocation(SSAOShaderHandle, "Bias"), m_Bias); + glUniform1f(glGetUniformLocation(SSAOShaderHandle, "IntensityDivR6"), m_Intensity / glm::pow(m_Radius, 6)); + + glUniform4fv(glGetUniformLocation(SSAOShaderHandle, "ProjInfo"), 1, glm::value_ptr(projInfo)); + glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1 + , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex); + + m_DrawBloomPass->ClearBuffer(); + m_DrawBloomPass->Draw(m_SSAOTexture); +} + +void ComputeAO(GLuint depthBuffer, Camera* camera) { + +} \ No newline at end of file diff --git a/src/Engine/Rendering/SSAOPassState.cpp b/src/Engine/Rendering/SSAOPassState.cpp new file mode 100644 index 00000000..7dd49841 --- /dev/null +++ b/src/Engine/Rendering/SSAOPassState.cpp @@ -0,0 +1,16 @@ +#include "Rendering/SSAOPassState.h" + + +SSAOPassState::SSAOPassState() +{ + //BindFramebuffer(0); + Disable(GL_BLEND); + Disable(GL_DEPTH_TEST); + Disable(GL_CULL_FACE); +} + +SSAOPassState::~SSAOPassState() +{ + +} + diff --git a/src/Engine/Rendering/ShaderProgram.cpp b/src/Engine/Rendering/ShaderProgram.cpp index 9c26c15c..ae536bc0 100644 --- a/src/Engine/Rendering/ShaderProgram.cpp +++ b/src/Engine/Rendering/ShaderProgram.cpp @@ -98,8 +98,7 @@ void ShaderProgram::AddShader(std::shared_ptr shader) void ShaderProgram::Compile() { - if (m_ShaderProgramHandle == 0) - { + if (m_ShaderProgramHandle == 0) { m_ShaderProgramHandle = glCreateProgram(); }