MipMap is working. But no gain :C

Conflicts:
	include/Engine/Rendering/Renderer.h
	src/Engine/Rendering/Renderer.cpp

include/Engine/Rendering/DrawFinalPass.h

@@ -18,7 +18,7 @@ public:
     void InitializeTextures();
     void InitializeFrameBuffers();
     void InitializeShaderPrograms();
-    void Draw(RenderScene& scene);
+    void Draw(RenderScene& scene, GLuint SSAOTexture);
     void ClearBuffer();
     void OnWindowResize();
 
@@ -37,7 +37,7 @@ private:
     void GenerateMipMapTexture(GLuint* texture, GLenum wrapping, glm::vec2 dimensions, GLint format, GLenum type, GLint numMipMaps) const;
 
     void DrawSprites(std::list<std::shared_ptr<RenderJob>>&jobs, RenderScene& scene);
-    void DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene);
+    void DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene, GLuint SSAOTexture);
     void DrawShieldToStencilBuffer(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene);
     void DrawShieldedModelRenderQueue(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene);
     void DrawToDepthBuffer(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene);

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"
@@ -58,6 +59,12 @@ private:
 
     int m_DebugTextureToDraw = 0;
     bool m_ResizeWindow = false;
+	float m_SSAO_Radius = 1.0f;
+	float m_SSAO_Bias = 0.05f;
+	float m_SSAO_Contrast = 1.5f;
+	float m_SSAO_IntensityScale = 1.0f;
+	int m_SSAO_NumOfSamples = 24;
+	int m_SSAO_NumOfTurns = 7;
 
     PickingPass* m_PickingPass;
     LightCullingPass* m_LightCullingPass;
@@ -66,6 +73,7 @@ private:
     DrawScreenQuadPass* m_DrawScreenQuadPass;
     DrawBloomPass* m_DrawBloomPass;
     DrawColorCorrectionPass* m_DrawColorCorrectionPass;
+	SSAOPass* m_SSAOPass;
 
     //----------------------Functions----------------------//
     void InitializeWindow();

include/Engine/Rendering/SSAOPass.h

@@ -0,0 +1,59 @@
+#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 contrast, float intensityScale, int numOfSamples, int NumOfTurns);
+	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 ComputeAO(GLuint depthBuffer, Camera* camera);
+	//void blurHorizontal(GLuint depthBuffer);
+	//void blurVertical(GLuint depthBuffer);
+
+	Model* m_ScreenQuad;
+
+	const IRenderer* m_Renderer;
+	static const GLint MAX_MIP_LEVEL = 5;
+	float m_Radius;
+	float m_Bias;
+	float m_Contrast;
+	float m_IntensityScale;
+	int m_NumOfSamples;
+	int m_NumOfTurns;
+
+	GLuint m_SSAOTexture;
+	FrameBuffer m_SSAOFramBuffer;
+
+	GLuint m_SSAOViewSpaceZTexture;
+	FrameBuffer m_SSAOViewSpaceZFramBuffer;
+
+	ShaderProgram* m_SSAOProgram;
+	ShaderProgram* m_SSAOViewSpaceZProgram;
+
+	DrawBloomPass* m_DrawBloomPass;
+};
+
+#endif

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

resources/Schema/Entities/Player.xml

@@ -349,13 +349,12 @@
           <Components>
             <c:Animation>
               <AnimationName1>Idle</AnimationName1>
-              <Time1>1.6050530664521858</Time1>
+              <Time1>1.8314163732853146</Time1>
               <Speed1>1</Speed1>
             </c:Animation>
             <c:Model>
               <Resource>Models/Characters/Assault/FirstPerson.mesh</Resource>
               <Color A="1" B="1" G="0.309803933" R="0"/>
-              <Transparent>true</Transparent>
             </c:Model>
             <c:Transform/>
           </Components>
@@ -367,11 +366,10 @@
                 </c:BoneAttachment>
                 <c:Model>
                   <Resource>Models/Weapons/Blue/AssaultWeaponBlue.mesh</Resource>
-                  <Transparent>true</Transparent>
                 </c:Model>
                 <c:Transform>
-                  <Position X="0.12043035" Y="-0.234149337" Z="-0.181454644"/>
-                  <Orientation X="0.0104045281" Y="-0.00268131681" Z="0.0428438708"/>
+                  <Position X="0.120430619" Y="-0.229687244" Z="-0.181454629"/>
+                  <Orientation X="0.0104048112" Y="-0.0026817855" Z="0.0428442657"/>
                 </c:Transform>
               </Components>
               <Children>
@@ -477,7 +475,7 @@
       <Components>
         <c:Animation>
           <AnimationName1>Idle</AnimationName1>
-          <Time1>1.620305457513453</Time1>
+          <Time1>0.16333512901638159</Time1>
           <Speed1>1</Speed1>
         </c:Animation>
         <c:AnimationOffset>
@@ -501,8 +499,8 @@
               <Resource>Models/Weapons/Blue/AssaultWeaponBlue.mesh</Resource>
             </c:Model>
             <c:Transform>
-              <Position X="0.160351232" Y="1.02591991" Z="-0.215102971"/>
-              <Orientation X="-0.0627480298" Y="-0.0432248674" Z="0.119431816"/>
+              <Position X="0.158296332" Y="1.03131664" Z="-0.21615544"/>
+              <Orientation X="-0.0626514703" Y="-0.0352048129" Z="0.12013837"/>
             </c:Transform>
           </Components>
           <Children>

resources/Schema/Entities/PlayerRed.xml

@@ -349,13 +349,12 @@
           <Components>
             <c:Animation>
               <AnimationName1>Idle</AnimationName1>
-              <Time1>1.6050530664521858</Time1>
+              <Time1>0.018170670865885086</Time1>
               <Speed1>1</Speed1>
             </c:Animation>
             <c:Model>
               <Resource>Models/Characters/Assault/FirstPerson.mesh</Resource>
               <Color A="1" B="0" G="0" R="1"/>
-              <Transparent>true</Transparent>
             </c:Model>
             <c:Transform/>
           </Components>
@@ -367,11 +366,10 @@
                 </c:BoneAttachment>
                 <c:Model>
                   <Resource>Models/Weapons/Red/AssaultWeaponRed.mesh</Resource>
-                  <Transparent>true</Transparent>
                 </c:Model>
                 <c:Transform>
-                  <Position X="0.12043035" Y="-0.234149337" Z="-0.181454644"/>
-                  <Orientation X="0.0104045281" Y="-0.00268131681" Z="0.0428438708"/>
+                  <Position X="0.120430693" Y="-0.2284486" Z="-0.181454509"/>
+                  <Orientation X="0.0104046017" Y="-0.00268172775" Z="0.0428442247"/>
                 </c:Transform>
               </Components>
               <Children>
@@ -477,7 +475,7 @@
       <Components>
         <c:Animation>
           <AnimationName1>Idle</AnimationName1>
-          <Time1>1.620305457513453</Time1>
+          <Time1>0.11675631578762591</Time1>
           <Speed1>1</Speed1>
         </c:Animation>
         <c:AnimationOffset>
@@ -501,8 +499,8 @@
               <Resource>Models/Weapons/Red/AssaultWeaponRed.mesh</Resource>
             </c:Model>
             <c:Transform>
-              <Position X="0.160351232" Y="1.02591991" Z="-0.215102971"/>
-              <Orientation X="-0.0627480298" Y="-0.0432248674" Z="0.119431816"/>
+              <Position X="0.157842755" Y="1.03184748" Z="-0.216178894"/>
+              <Orientation X="-0.0626459867" Y="-0.0335309952" Z="0.120309927"/>
             </c:Transform>
           </Components>
           <Children>

resources/Shaders/DrawColorCorrection.frag.glsl

@@ -19,6 +19,8 @@ void main()
 	vec4 bloomColor = texture(BloomTexture, Input.TextureCoordinate);
 	vec4 hdrColorLowRes = texture(SceneTextureLowRes, Input.TextureCoordinate);
 	vec4 bloomColorLowRes = texture(BloomTextureLowRes, Input.TextureCoordinate);
+
+	//hdrColor = hdrColor * SSAO;
 	hdrColor += bloomColor;
 	hdrColorLowRes;
 
@@ -33,7 +35,6 @@ void main()
 
 	//gamme correction
 	result = pow(result, vec3(1.0 / Gamma));
-
 	fragmentColor = vec4(result, 1.0);
 	//fragmentColor = hdrColor;
 	//fragmentColor = bloomColor;

resources/Shaders/ForwardPlus.frag.glsl

@@ -1,5 +1,7 @@
 #version 430
 
+#define MIN_AMBIENT_LIGHT 0.3
+
 uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
@@ -15,10 +17,11 @@ uniform vec2 DiffuseUVRepeat;
 uniform vec2 NormalUVRepeat;
 uniform vec2 SpecularUVRepeat;
 uniform vec2 GlowUVRepeat;
-layout (binding = 0) uniform sampler2D DiffuseTexture;
-layout (binding = 1) uniform sampler2D NormalMapTexture;
-layout (binding = 2) uniform sampler2D SpecularMapTexture;
-layout (binding = 3) uniform sampler2D GlowMapTexture;
+layout (binding = 0) uniform sampler2D AOTexture;
+layout (binding = 1) uniform sampler2D DiffuseTexture;
+layout (binding = 2) uniform sampler2D NormalMapTexture;
+layout (binding = 3) uniform sampler2D SpecularMapTexture;
+layout (binding = 4) uniform sampler2D GlowMapTexture;
 
 #define TILE_SIZE 16
 
@@ -120,6 +123,8 @@ vec4 CalcNormalMappedValue(vec3 normal, vec3 tangent, vec3 bitangent, vec2 textu
 
 void main()
 {
+	float ao = texelFetch(AOTexture, ivec2(gl_FragCoord.xy), 0).r;
+	ao = (clamp(1.0 - (1.0 - ao), 0.0, 1.0) + MIN_AMBIENT_LIGHT) /  (1.0 + MIN_AMBIENT_LIGHT);
 	vec4 diffuseTexel = texture2D(DiffuseTexture, Input.TextureCoordinate * DiffuseUVRepeat);
 	vec4 glowTexel = texture2D(GlowMapTexture, Input.TextureCoordinate * GlowUVRepeat);
 	vec4 specularTexel = texture2D(SpecularMapTexture, Input.TextureCoordinate * SpecularUVRepeat);
@@ -134,7 +139,7 @@ void main()
 	tilePos.y = int(gl_FragCoord.y/TILE_SIZE);
 
 	LightResult totalLighting;
-	totalLighting.Diffuse = vec4(AmbientColor.rgb, 1.0);
+	totalLighting.Diffuse = vec4(AmbientColor.rgb * ao, 1.0);
 	int currentTile = int(floor(gl_FragCoord.x/TILE_SIZE) + (floor(gl_FragCoord.y/TILE_SIZE) * int(ScreenDimensions.x/TILE_SIZE)));
 
 	int start = int(LightGrids.Data[currentTile].Start);
@@ -152,8 +157,8 @@ void main()
 		} else if (light.Type == 2) { //Directional
 			light_result = CalcDirectionalLightSource(V * light.Direction, light.Color, light.Intensity, viewVec, normal);
 		}
-		totalLighting.Diffuse += light_result.Diffuse;
-		totalLighting.Specular += light_result.Specular;
+		totalLighting.Diffuse += vec4(light_result.Diffuse.rgb * ao, light_result.Diffuse.a);
+		totalLighting.Specular += vec4(light_result.Specular.rgb * ao, light_result.Specular.a);
 	}
 
 	vec4 color_result = mix((Color * diffuseTexel * DiffuseColor), Input.ExplosionColor, Input.ExplosionPercentageElapsed);

resources/Shaders/ForwardPlusSplatMapRGB.frag.glsl

@@ -1,5 +1,7 @@
 #version 430
 
+#define MIN_AMBIENT_LIGHT 0.3
+
 uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
@@ -23,19 +25,20 @@ uniform vec2 SpecularUVRepeat3;
 uniform vec2 GlowUVRepeat1;
 uniform vec2 GlowUVRepeat2;
 uniform vec2 GlowUVRepeat3;
-layout (binding = 0) uniform sampler2D SplatMapTexture;
-layout (binding = 1) uniform sampler2D DiffuseTexture1;
-layout (binding = 2) uniform sampler2D DiffuseTexture2;
-layout (binding = 3) uniform sampler2D DiffuseTexture3;
-layout (binding = 4) uniform sampler2D NormalMapTexture1;
-layout (binding = 5) uniform sampler2D NormalMapTexture2;
-layout (binding = 6) uniform sampler2D NormalMapTexture3;
-layout (binding = 7) uniform sampler2D SpecularMapTexture1;
-layout (binding = 8) uniform sampler2D SpecularMapTexture2;
-layout (binding = 9) uniform sampler2D SpecularMapTexture3;
-layout (binding = 10) uniform sampler2D GlowMapTexture1;
-layout (binding = 11) uniform sampler2D GlowMapTexture2;
-layout (binding = 12) uniform sampler2D GlowMapTexture3;
+layout (binding = 0) uniform sampler2D AOTexture;
+layout (binding = 1) uniform sampler2D SplatMapTexture;
+layout (binding = 2) uniform sampler2D DiffuseTexture1;
+layout (binding = 3) uniform sampler2D DiffuseTexture2;
+layout (binding = 4) uniform sampler2D DiffuseTexture3;
+layout (binding = 5) uniform sampler2D NormalMapTexture1;
+layout (binding = 6) uniform sampler2D NormalMapTexture2;
+layout (binding = 7) uniform sampler2D NormalMapTexture3;
+layout (binding = 8) uniform sampler2D SpecularMapTexture1;
+layout (binding = 9) uniform sampler2D SpecularMapTexture2;
+layout (binding = 10) uniform sampler2D SpecularMapTexture3;
+layout (binding = 11) uniform sampler2D GlowMapTexture1;
+layout (binding = 12) uniform sampler2D GlowMapTexture2;
+layout (binding = 13) uniform sampler2D GlowMapTexture3;
 
 #define TILE_SIZE 16
 
@@ -174,6 +177,9 @@ vec4 CalcBlendedNormal(vec4 blendValue, sampler2D R, sampler2D G, sampler2D B,
 
 void main()
 {
+	float ao = texelFetch(AOTexture, ivec2(gl_FragCoord.xy), 0).r;
+	ao = (clamp(1.0 - (1.0 - ao), 0.0, 1.0) + MIN_AMBIENT_LIGHT) /  (1.0 + MIN_AMBIENT_LIGHT);
+
 	vec4 splatTexel = texture2D(SplatMapTexture, Input.TextureCoordinate);
 
 	vec4 diffuseTexel = CalcBlendedTexel(splatTexel, DiffuseTexture1, DiffuseTexture2, DiffuseTexture3,
@@ -195,7 +201,7 @@ void main()
 	tilePos.y = int(gl_FragCoord.y/TILE_SIZE);
 
 	LightResult totalLighting;
-	totalLighting.Diffuse = vec4(AmbientColor.rgb, 1.0);
+	totalLighting.Diffuse = vec4(AmbientColor.rgb * ao, 1.0);
 	int currentTile = int(floor(gl_FragCoord.x/TILE_SIZE) + (floor(gl_FragCoord.y/TILE_SIZE) * int(ScreenDimensions.x/TILE_SIZE)));
 
 	int start = int(LightGrids.Data[currentTile].Start);
@@ -213,8 +219,8 @@ void main()
 		} else if (light.Type == 2) { //Directional
 			light_result = CalcDirectionalLightSource(V * light.Direction, light.Color, light.Intensity, viewVec, normal);
 		}
-		totalLighting.Diffuse += light_result.Diffuse;
-		totalLighting.Specular += light_result.Specular;
+		totalLighting.Diffuse += vec4(light_result.Diffuse.rgb * ao, light_result.Diffuse.a);
+		totalLighting.Specular += vec4(light_result.Specular.rgb * ao, light_result.Specular.a);
 	}
 
 	vec4 color_result = mix((Color * diffuseTexel * DiffuseColor), Input.ExplosionColor, Input.ExplosionPercentageElapsed);

resources/Shaders/SSAO.frag.glsl

@@ -0,0 +1,123 @@
+#version 430
+
+#define MIP_MAPS_LEVELS (3)
+
+#define MAX_PIXEL_BEFOR_LOWER_MIP_LEVEL (3)
+//Number of samples per pixel
+uniform int           uNumOfSamples;
+//#define uNumOfSamples (11)
+
+//Number of turns around the cirle
+uniform int           uNumOfTurns;
+//#define uNumOfTurns (7)
+
+layout (binding = 0) uniform sampler2D ViewSpaceZ;
+
+uniform vec4 uProjInfo;
+
+uniform float           uProjScale;
+//#define ProjScale 500
+
+uniform float           uRadius;
+//#define Radius 1.0f
+
+uniform float           uBias;
+//#define Bias 0.012f
+
+uniform float           uContrast;
+//#define IntensityDivR6 1
+
+uniform float           uIntensityScale;
+
+out float				AO;
+
+vec3 getVSPosition(ivec2 ScreenSpaceCoord) {
+    float z = texelFetch(ViewSpaceZ, ScreenSpaceCoord, 0).r;
+    //Get the xy view space coordinates and add the z value from ViewSpaceZ buffer.
+    return vec3((uProjInfo[0] + (ScreenSpaceCoord.x * uProjInfo[1])) * z, (uProjInfo[2] + (ScreenSpaceCoord.y * uProjInfo[3])) * z, 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){
+	// SampleIndex + 0.5f so that we alpha != 0, since if alpha = 0 then screenSpaceSampleTexel will be the same texel as origin. 
+	float alpha = float(SampleIndex + 0.5f) * (1.0f / uNumOfSamples);
+
+	// Angle to where to sample
+    float angle = alpha * (uNumOfTurns * 6.28f) + RotationAngle;
+
+	//Lenght to were to sample
+    ScreenSpaceSampleRadius = ScreenSpaceSampleRadius * alpha;
+
+    vec2 screenSpaceSampleOffsetVecor = vec2(cos(angle), sin(angle));
+
+    //int mipmapLevel = clamp(int(floor(log2(-ScreenSpaceSampleRadius))) - MAX_PIXEL_BEFOR_LOWER_MIP_LEVEL, 0, MIP_MAPS_LEVELS);
+
+    // 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);// >> mipmapLevel;
+
+    return getVSPosition(screenSpaceSampleTexel);
+}
+
+
+
+float sampleAO(ivec2 ScreenSpaceCoord, vec3 Origin, vec3 OriginNormal, float ScreenSpaceSampleRadius, int SampleIndex, float RotationAngle, float Radius, float Radius2) {
+	vec3 sampleViewSpacePosition = getSampleViewSpacePos(ScreenSpaceCoord, SampleIndex, RotationAngle, ScreenSpaceSampleRadius);
+	vec3 sampleVector = Origin - sampleViewSpacePosition;
+	// vv = sampleVectorLenght ^ 2
+	float vv = dot(sampleVector, sampleVector);
+	// vn = angle between sampleVector and Normal
+	float vn = dot(sampleVector, OriginNormal);
+
+	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 - uBias) / (epsilon + vv), 0.0);
+	//float f = max(radius2 - vv, 0.0); 
+	//return f * f * f * max((vn - uBias) / (epsilon + vv), 0.0);
+}
+
+
+void main() {
+	ivec2 originScreenCoord = ivec2(gl_FragCoord.xy);
+
+	// We always get the Orginin from the level 0 of the mipmaps
+	vec3 origin = getVSPosition(originScreenCoord);
+
+	float radius;
+
+	if(origin.z < uRadius){
+		radius = origin.z;
+	} else {
+		radius = uRadius;
+	}
+
+
+	float radius2 = radius * radius;
+
+	vec3 originNormal = getVSFaceNormal(origin);
+
+	//screenSpaceSampleRadius is in pixels
+	float screenSpaceSampleRadius = -uProjScale * radius / origin.z;
+	//screenSpaceSampleRadius = clamp(screenSpaceSampleRadius, 0.0f, -uProjScale * radius);
+
+	float rotationAngleOffset = 30 * originScreenCoord.x ^ originScreenCoord.y + 10 * originScreenCoord.x * originScreenCoord.y;
+
+	float sum = 0.0f;
+    for(int i = 0; i < uNumOfSamples; i++) {
+        sum += sampleAO(originScreenCoord, origin, originNormal, screenSpaceSampleRadius, i, rotationAngleOffset, radius, radius2);
+    }
+
+    //float A = max(0.0, 1.0 - sum * (2.0f / uNumOfSamples));
+    float A = 1.0f - sum * (2.0f * uIntensityScale / float(uNumOfSamples));
+    AO = clamp(pow(A, uContrast), 0.0f, 1.0f);
+    //AO = screenSpaceSampleRadius;
+	//AO = vec4(originNormal, 1.0f);
+}

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);
+}

resources/Shaders/SSAOMipMappedZ.frag.glsl

@@ -0,0 +1,123 @@
+#version 430
+
+#define MIP_MAPS_LEVELS (5)
+
+#define LOWER_MIP_LEVEL (2)
+//Number of samples per pixel
+uniform int           uNumOfSamples;
+//#define uNumOfSamples (11)
+
+//Number of turns around the cirle
+uniform int           uNumOfTurns;
+//#define uNumOfTurns (7)
+
+layout (binding = 0) uniform sampler2D ViewSpaceZ;
+
+uniform vec4 uProjInfo;
+
+uniform float           uProjScale;
+//#define ProjScale 500
+
+uniform float           uRadius;
+//#define Radius 1.0f
+
+uniform float           uBias;
+//#define Bias 0.012f
+
+uniform float           uContrast;
+//#define IntensityDivR6 1
+
+uniform float           uIntensityScale;
+
+out float				AO;
+
+vec3 getVSPosition(ivec2 ScreenSpaceCoord, int mipmaplevel) {
+    float z = texelFetch(ViewSpaceZ, ScreenSpaceCoord, mipmaplevel).r;
+    //Get the xy view space coordinates and add the z value from ViewSpaceZ buffer.
+    return vec3((uProjInfo[0] + (ScreenSpaceCoord.x * uProjInfo[1])) * z, (uProjInfo[2] + (ScreenSpaceCoord.y * uProjInfo[3])) * z, 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){
+	// SampleIndex + 0.5f so that we alpha != 0, since if alpha = 0 then screenSpaceSampleTexel will be the same texel as origin. 
+	float alpha = float(SampleIndex + 0.5f) * (1.0f / uNumOfSamples);
+
+	// Angle to where to sample
+    float angle = alpha * (uNumOfTurns * 6.28f) + RotationAngle;
+
+	//Lenght to were to sample
+    ScreenSpaceSampleRadius = ScreenSpaceSampleRadius * alpha;
+
+    vec2 screenSpaceSampleOffsetVecor = vec2(cos(angle), sin(angle));
+
+    int mipmapLevel = clamp(int(floor(log2(-ScreenSpaceSampleRadius))) - LOWER_MIP_LEVEL, 0, MIP_MAPS_LEVELS);
+    // 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) >> mipmapLevel;
+
+    return getVSPosition(screenSpaceSampleTexel, mipmapLevel);
+}
+
+
+
+float sampleAO(ivec2 ScreenSpaceCoord, vec3 Origin, vec3 OriginNormal, float ScreenSpaceSampleRadius, int SampleIndex, float RotationAngle, float Radius, float Radius2) {
+	vec3 sampleViewSpacePosition = getSampleViewSpacePos(ScreenSpaceCoord, SampleIndex, RotationAngle, ScreenSpaceSampleRadius);
+	vec3 sampleVector = Origin - sampleViewSpacePosition;
+	// vv = sampleVectorLenght ^ 2
+	float vv = dot(sampleVector, sampleVector);
+	// vn = angle between sampleVector and Normal
+	float vn = dot(sampleVector, OriginNormal);
+
+	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 - uBias) / (epsilon + vv), 0.0);
+}
+
+
+void main() {
+	ivec2 originScreenCoord = ivec2(gl_FragCoord.xy);
+
+	// We always get the Orginin from the level 0 of the mipmaps
+	vec3 origin = getVSPosition(originScreenCoord, 0);
+
+	float radius;
+
+	if(origin.z < uRadius){
+		radius = origin.z;
+	} else {
+		radius = uRadius;
+	}
+
+	float radius2 = radius * radius;
+
+	vec3 originNormal = getVSFaceNormal(origin);
+	//AO = originNormal;
+	//return;
+
+	//screenSpaceSampleRadius is in pixels
+	float screenSpaceSampleRadius = -uProjScale * radius / origin.z;
+
+	//screenSpaceSampleRadius = clamp(screenSpaceSampleRadius, 0.0f, pow(2, MIP_MAPS_LEVELS * LOWER_MIP_LEVEL + 1));
+	//AO = clamp(int(floor(log2(screenSpaceSampleRadius))) - LOWER_MIP_LEVEL, 0, MIP_MAPS_LEVELS);
+	//return;
+
+	float rotationAngleOffset = 30 * originScreenCoord.x ^ originScreenCoord.y + 10 * originScreenCoord.x * originScreenCoord.y;
+
+	float sum = 0.0f;
+    for(int i = 0; i < uNumOfSamples; i++) {
+        sum += sampleAO(originScreenCoord, origin, originNormal, screenSpaceSampleRadius, i, rotationAngleOffset, radius, radius2);
+    }
+
+    //float A = max(0.0, 1.0 - sum * (2.0f / uNumOfSamples));
+    float A = 1.0f - sum * (2.0f * uIntensityScale / float(uNumOfSamples));
+    AO = clamp(pow(A, uContrast), 0.0f, 1.0f);
+	//AO = vec4(originNormal, 1.0f);
+}

resources/Shaders/SSAOViewSpaceZ.frag.glsl

@@ -0,0 +1,14 @@
+#version 430
+
+layout (binding = 0) 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;
+	depthLinear = ClipInfo[0] / (ClipInfo[1] * depthSample + ClipInfo[2]);
+	//float depthLinear = (NearClip) / ( -depthSample + 1.0f);
+	//fragmentColor = vec4(depthLinear, depthLinear, depthLinear, 1.0f);
+}

resources/Shaders/Sprite.frag.glsl

@@ -7,8 +7,8 @@ uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
 
-layout (binding = 0) uniform sampler2D DiffuseTexture;
-layout (binding = 1) uniform sampler2D GlowMapTexture;
+layout (binding = 1) uniform sampler2D DiffuseTexture;
+layout (binding = 2) uniform sampler2D GlowMapTexture;
 
 
 in VertexData{

src/Engine/Rendering/DrawBloomPass.cpp

@@ -19,16 +19,20 @@ void DrawBloomPass::InitializeTextures()
 void DrawBloomPass::InitializeShaderPrograms()
 {
     m_GaussianProgram_horiz = ResourceManager::Load<ShaderProgram>("##GaussianProgramHoriz");
-    m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_horiz.vert.glsl")));
-    m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(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<Shader>(new VertexShader("Shaders/Gaussian_horiz.vert.glsl")));
+		m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_horiz.frag.glsl")));
+		m_GaussianProgram_horiz->Compile();
+		m_GaussianProgram_horiz->Link();
+	}
 
-    m_GaussianProgram_vert = ResourceManager::Load<ShaderProgram>("##GaussianProgramVert");
-    m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_vert.vert.glsl")));
-    m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_vert.frag.glsl")));
-    m_GaussianProgram_vert->Compile();
-    m_GaussianProgram_vert->Link();
+	m_GaussianProgram_vert = ResourceManager::Load<ShaderProgram>("##GaussianProgramVert");
+	if (m_GaussianProgram_vert->GetHandle() == 0) {
+		m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_vert.vert.glsl")));
+		m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_vert.frag.glsl")));
+		m_GaussianProgram_vert->Compile();
+		m_GaussianProgram_vert->Link();
+	}
 }
 
 
@@ -71,15 +75,12 @@ void DrawBloomPass::Draw(GLuint texture)
     //Horizontal pass, first use the given texture then save it to the horizontal framebuffer.
     m_GaussianFrameBuffer_horiz.Bind();
     m_GaussianProgram_horiz->Bind();
-
     glActiveTexture(GL_TEXTURE0);
     glBindTexture(GL_TEXTURE_2D, texture);
-
     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);
-
     //Iterate some times to make it more gaussian.
     for (int i = 1; i < m_iterations; i++) {
         //Vertical pass
@@ -92,7 +93,6 @@ 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);
-
         //horizontal pass
 
         m_GaussianFrameBuffer_horiz.Bind();
@@ -112,7 +112,6 @@ void DrawBloomPass::Draw(GLuint texture)
     m_GaussianProgram_vert->Bind();
 
     glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
-
     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

src/Engine/Rendering/DrawFinalPass.cpp

@@ -27,6 +27,7 @@ void DrawFinalPass::InitializeFrameBuffers()
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
     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);
     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);
@@ -173,25 +174,25 @@ void DrawFinalPass::InitializeShaderPrograms()
     GLERROR("Creating DepthFill program");
 }
 
-void DrawFinalPass::Draw(RenderScene& scene)
+void DrawFinalPass::Draw(RenderScene& scene, GLuint SSAOTexture)
 {
     GLERROR("Pre");
-
     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);
     glClear(GL_STENCIL_BUFFER_BIT);
 
     //Fill depth buffer
-
-
+	
     state->StencilMask(0x00);
-    DrawModelRenderQueues(scene.Jobs.OpaqueObjects, scene);
+    DrawModelRenderQueues(scene.Jobs.OpaqueObjects, scene, SSAOTexture);
     GLERROR("OpaqueObjects");
-    DrawModelRenderQueues(scene.Jobs.TransparentObjects, scene);
+    DrawModelRenderQueues(scene.Jobs.TransparentObjects, scene, SSAOTexture);
     GLERROR("TransparentObjects");
     DrawSprites(scene.Jobs.SpriteJob, scene);
     GLERROR("SpriteJobs");
@@ -206,11 +207,11 @@ void DrawFinalPass::Draw(RenderScene& scene)
     //Draw Opaque shielded objects
     state->StencilFunc(GL_NOTEQUAL, 1, 0xFF);
     state->StencilMask(0x00);
-    DrawModelRenderQueues(scene.Jobs.OpaqueShieldedObjects, scene); //might need changing
+    DrawModelRenderQueues(scene.Jobs.OpaqueShieldedObjects, scene, SSAOTexture); //might need changing
     GLERROR("Shielded Opaque object");
 
     //Draw Transparen Shielded objects
-    DrawModelRenderQueues(scene.Jobs.TransparentShieldedObjects, scene); //might need changing
+    DrawModelRenderQueues(scene.Jobs.TransparentShieldedObjects, scene, SSAOTexture); //might need changing
     GLERROR("Shielded Transparent objects");
 
     GLERROR("END");
@@ -241,14 +242,14 @@ 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);
     stateLowRes->StencilMask(0x00);
-    DrawModelRenderQueues(scene.Jobs.OpaqueObjects, scene);
+    DrawModelRenderQueues(scene.Jobs.OpaqueObjects, scene, SSAOTexture);
     GLERROR("OpaqueObjects");
-    DrawModelRenderQueues(scene.Jobs.TransparentObjects, scene);
+    DrawModelRenderQueues(scene.Jobs.TransparentObjects, scene, SSAOTexture);
     GLERROR("TransparentObjects");
     glViewport(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
     glScissor(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
@@ -321,7 +322,7 @@ void DrawFinalPass::GenerateMipMapTexture(GLuint* texture, GLenum wrapping, glm:
     GLERROR("MipMap Texture initialization failed");
 }
 
-void DrawFinalPass::DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene)
+void DrawFinalPass::DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>& jobs, RenderScene& scene, GLuint SSAOTexture)
 {
     GLuint forwardHandle = m_ForwardPlusProgram->GetHandle();
     GLERROR("forwardHandle");
@@ -344,6 +345,9 @@ void DrawFinalPass::DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>&
     glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, m_LightCullingPass->LightGridSSBO());
     glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, m_LightCullingPass->LightIndexSSBO());
 
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(GL_TEXTURE_2D, SSAOTexture);
+
     for (auto &job : jobs) {
         auto explosionEffectJob = std::dynamic_pointer_cast<ExplosionEffectJob>(job);
         if (explosionEffectJob) {
@@ -690,14 +694,14 @@ void DrawFinalPass::DrawSprites(std::list<std::shared_ptr<RenderJob>>&jobs, Rend
             glUniform4fv(glGetUniformLocation(shaderHandle, "FillColor"), 1, glm::value_ptr(spriteJob->FillColor));
             glUniform1f(glGetUniformLocation(shaderHandle, "FillPercentage"), spriteJob->FillPercentage);
 
-            glActiveTexture(GL_TEXTURE0);
+            glActiveTexture(GL_TEXTURE1);
             if (spriteJob->DiffuseTexture != nullptr) {
                 glBindTexture(GL_TEXTURE_2D, spriteJob->DiffuseTexture->m_Texture);
             } else {
                 glBindTexture(GL_TEXTURE_2D, m_ErrorTexture->m_Texture);
             }
 
-            glActiveTexture(GL_TEXTURE1);
+            glActiveTexture(GL_TEXTURE2);
             if (spriteJob->IncandescenceTexture != nullptr) {
                 glBindTexture(GL_TEXTURE_2D, spriteJob->IncandescenceTexture->m_Texture);
             } else {
@@ -807,7 +811,7 @@ void DrawFinalPass::BindExplosionTextures(GLuint shaderHandle, std::shared_ptr<E
 	case RawModel::MaterialType::SingleTextures:
 	case RawModel::MaterialType::Basic:
 	{
-		glActiveTexture(GL_TEXTURE0);
+		glActiveTexture(GL_TEXTURE1);
 		if (job->DiffuseTexture.size() > 0 && job->DiffuseTexture[0]->Texture != nullptr) {
 			glBindTexture(GL_TEXTURE_2D, job->DiffuseTexture[0]->Texture->m_Texture);
 			glUniform2fv(glGetUniformLocation(shaderHandle, "DiffuseUVRepeat"), 1, glm::value_ptr(job->DiffuseTexture[0]->UVRepeat));
@@ -817,7 +821,7 @@ void DrawFinalPass::BindExplosionTextures(GLuint shaderHandle, std::shared_ptr<E
 			glUniform2fv(glGetUniformLocation(shaderHandle, "DiffuseUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 		}
 
-		glActiveTexture(GL_TEXTURE1);
+		glActiveTexture(GL_TEXTURE2);
 		if (job->NormalTexture.size() > 0 && job->NormalTexture[0]->Texture != nullptr) {
 			glBindTexture(GL_TEXTURE_2D, job->NormalTexture[0]->Texture->m_Texture);
 			glUniform2fv(glGetUniformLocation(shaderHandle, "NormalUVRepeat"), 1, glm::value_ptr(job->NormalTexture[0]->UVRepeat));
@@ -827,7 +831,7 @@ void DrawFinalPass::BindExplosionTextures(GLuint shaderHandle, std::shared_ptr<E
 			glUniform2fv(glGetUniformLocation(shaderHandle, "NormalUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 		}
 
-		glActiveTexture(GL_TEXTURE2);
+		glActiveTexture(GL_TEXTURE3);
 		if (job->SpecularTexture.size() > 0 && job->SpecularTexture[0]->Texture != nullptr) {
 			glBindTexture(GL_TEXTURE_2D, job->SpecularTexture[0]->Texture->m_Texture);
 			glUniform2fv(glGetUniformLocation(shaderHandle, "SpecularUVRepeat"), 1, glm::value_ptr(job->SpecularTexture[0]->UVRepeat));
@@ -837,7 +841,7 @@ void DrawFinalPass::BindExplosionTextures(GLuint shaderHandle, std::shared_ptr<E
 			glUniform2fv(glGetUniformLocation(shaderHandle, "SpecularUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 		}
 
-		glActiveTexture(GL_TEXTURE3);
+		glActiveTexture(GL_TEXTURE4);
 		if (job->IncandescenceTexture.size() > 0 && job->IncandescenceTexture[0]->Texture != nullptr) {
 			glBindTexture(GL_TEXTURE_2D, job->IncandescenceTexture[0]->Texture->m_Texture);
 			glUniform2fv(glGetUniformLocation(shaderHandle, "GlowUVRepeat"), 1, glm::value_ptr(job->IncandescenceTexture[0]->UVRepeat));
@@ -850,7 +854,7 @@ void DrawFinalPass::BindExplosionTextures(GLuint shaderHandle, std::shared_ptr<E
 	}
 	case RawModel::MaterialType::SplatMapping:
 	{
-		glActiveTexture(GL_TEXTURE0);
+		glActiveTexture(GL_TEXTURE1);
 		glBindTexture(GL_TEXTURE_2D, job->SplatMap->Texture->m_Texture);
 
 		int texturePosition = GL_TEXTURE1;
@@ -925,7 +929,7 @@ void DrawFinalPass::BindModelTextures(GLuint shaderHandle, std::shared_ptr<Model
 		case RawModel::MaterialType::SingleTextures:
 		case RawModel::MaterialType::Basic:
 		{
-			glActiveTexture(GL_TEXTURE0);
+			glActiveTexture(GL_TEXTURE1);
 			if (job->DiffuseTexture.size() > 0 && job->DiffuseTexture[0]->Texture != nullptr) {
 				glBindTexture(GL_TEXTURE_2D, job->DiffuseTexture[0]->Texture->m_Texture);
 				glUniform2fv(glGetUniformLocation(shaderHandle, "DiffuseUVRepeat"), 1, glm::value_ptr(job->DiffuseTexture[0]->UVRepeat));
@@ -935,7 +939,7 @@ void DrawFinalPass::BindModelTextures(GLuint shaderHandle, std::shared_ptr<Model
 				glUniform2fv(glGetUniformLocation(shaderHandle, "DiffuseUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 			}
 
-			glActiveTexture(GL_TEXTURE1);
+			glActiveTexture(GL_TEXTURE2);
 			if (job->NormalTexture.size() > 0 && job->NormalTexture[0]->Texture != nullptr) {
 				glBindTexture(GL_TEXTURE_2D, job->NormalTexture[0]->Texture->m_Texture);
 				glUniform2fv(glGetUniformLocation(shaderHandle, "NormalUVRepeat"), 1, glm::value_ptr(job->NormalTexture[0]->UVRepeat));
@@ -945,7 +949,7 @@ void DrawFinalPass::BindModelTextures(GLuint shaderHandle, std::shared_ptr<Model
 				glUniform2fv(glGetUniformLocation(shaderHandle, "NormalUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 			}
 
-			glActiveTexture(GL_TEXTURE2);
+			glActiveTexture(GL_TEXTURE3);
 			if (job->SpecularTexture.size() > 0 && job->SpecularTexture[0]->Texture != nullptr) {
 				glBindTexture(GL_TEXTURE_2D, job->SpecularTexture[0]->Texture->m_Texture);
 				glUniform2fv(glGetUniformLocation(shaderHandle, "SpecularUVRepeat"), 1, glm::value_ptr(job->SpecularTexture[0]->UVRepeat));
@@ -955,7 +959,7 @@ void DrawFinalPass::BindModelTextures(GLuint shaderHandle, std::shared_ptr<Model
 				glUniform2fv(glGetUniformLocation(shaderHandle, "SpecularUVRepeat"), 1, glm::value_ptr(glm::vec2(1.0f, 1.0f)));
 			}
 
-			glActiveTexture(GL_TEXTURE3);
+			glActiveTexture(GL_TEXTURE4);
 			if (job->IncandescenceTexture.size() > 0 && job->IncandescenceTexture[0]->Texture != nullptr) {
 				glBindTexture(GL_TEXTURE_2D, job->IncandescenceTexture[0]->Texture->m_Texture);
 				glUniform2fv(glGetUniformLocation(shaderHandle, "GlowUVRepeat"), 1, glm::value_ptr(job->IncandescenceTexture[0]->UVRepeat));
@@ -968,10 +972,10 @@ void DrawFinalPass::BindModelTextures(GLuint shaderHandle, std::shared_ptr<Model
 		}
 		case RawModel::MaterialType::SplatMapping:
 		{
-			glActiveTexture(GL_TEXTURE0);
+			glActiveTexture(GL_TEXTURE1);
 			glBindTexture(GL_TEXTURE_2D, job->SplatMap->Texture->m_Texture);
 
-			int texturePosition = GL_TEXTURE1;
+			int texturePosition = GL_TEXTURE2;
 		
 			//Bind 5 diffuse textures
 			std::string UniformName = "DiffuseUVRepeat";

src/Engine/Rendering/PickingPass.cpp

@@ -25,11 +25,20 @@ void PickingPass::InitializeTextures()
 
 void PickingPass::InitializeFrameBuffers()
 {
-    glGenRenderbuffers(1, &m_DepthBuffer);
+   /* glGenRenderbuffers(1, &m_DepthBuffer);
     glBindRenderbuffer(GL_RENDERBUFFER, m_DepthBuffer);
-    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);*/
 
-    m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new RenderBuffer(&m_DepthBuffer, GL_DEPTH_ATTACHMENT)));
+	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);
+
+    m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_DepthBuffer, GL_DEPTH_ATTACHMENT)));
     m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_PickingTexture, GL_COLOR_ATTACHMENT0)));
     m_PickingBuffer.Generate();
 }
@@ -63,7 +72,9 @@ void PickingPass::Draw(RenderScene& scene)
     m_PickingProgram->Bind();
 
     if (scene.ClearDepth) {
-        glClear(GL_DEPTH_BUFFER_BIT);
+        //glClear(GL_DEPTH_BUFFER_BIT);
+		state->Disable(GL_DEPTH_TEST);
+		state->DepthMask(GL_FALSE);
     }
     m_Camera = scene.Camera;
 

src/Engine/Rendering/Renderer.cpp

@@ -108,7 +108,15 @@ 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\0Ambient Occlusion");
+
+	ImGui::SliderFloat("SSAO sample radius", &m_SSAO_Radius, 0.01f, 5.0f);
+	ImGui::SliderFloat("SSAO bias", &m_SSAO_Bias, 0.0f, 0.1f);
+	ImGui::SliderFloat("SSAO contrast", &m_SSAO_Contrast, 0.0f, 10.0f);
+	ImGui::SliderFloat("SSAO IntensityScale", &m_SSAO_IntensityScale, 0.0f, 10.0f);
+	ImGui::SliderInt("SSAO Number of Samples", &m_SSAO_NumOfSamples, 2, 100);
+	ImGui::SliderInt("SSAO Number of Turns", &m_SSAO_NumOfTurns, 0, 50);
+	m_SSAOPass->Setting(m_SSAO_Radius, m_SSAO_Bias, m_SSAO_Contrast, m_SSAO_IntensityScale, m_SSAO_NumOfSamples, m_SSAO_NumOfTurns);
     //clear buffer 0
     glClearColor(0.f, 0.f, 0.f, 0.f);
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -119,15 +127,21 @@ void Renderer::Draw(RenderFrame& frame)
     m_DrawFinalPass->ClearBuffer();
     m_DrawBloomPass->ClearBuffer();
     PerformanceTimer::StopTimer("Renderer-ClearBuffers");
-
+	for (auto scene : frame.RenderScenes) {
+		PerformanceTimer::StartTimer("Renderer-Depth");
+		m_PickingPass->Draw(*scene);
+		GLERROR("Drawing pickingpass");
+		PerformanceTimer::StopTimer("Renderer-Depth");
+	}
+	PerformanceTimer::StartTimer("AO generation");
+	m_SSAOPass->Draw(m_PickingPass->DepthBuffer(), frame.RenderScenes.front()->Camera);
+	GLuint ao = m_SSAOPass->SSAOTexture();
+	PerformanceTimer::StopTimer("AO generation");
     for (auto scene : frame.RenderScenes){
         
-        PerformanceTimer::StartTimer("Renderer-Depth");
+        PerformanceTimer::StartTimer("Renderer-Drawing PickingPass");
         SortRenderJobsByDepth(*scene);
         GLERROR("SortByDepth");
-        PerformanceTimer::StartTimerAndStopPrevious("Renderer-Drawing PickingPass");
-        m_PickingPass->Draw(*scene);
-        GLERROR("Drawing pickingpass");
         PerformanceTimer::StartTimerAndStopPrevious("Renderer-Generate Frustrums");
         m_LightCullingPass->GenerateNewFrustum(*scene);
         GLERROR("Generate frustums");
@@ -137,8 +151,8 @@ void Renderer::Draw(RenderFrame& frame)
         PerformanceTimer::StartTimerAndStopPrevious("Renderer-Light Culling");
         m_LightCullingPass->CullLights(*scene);
         GLERROR("LightCulling");
+		m_DrawFinalPass->Draw(*scene, ao);
         PerformanceTimer::StartTimerAndStopPrevious("Renderer-Draw Geometry+Light");
-        m_DrawFinalPass->Draw(*scene);
         GLERROR("Draw Geometry+Light");
         //m_DrawScenePass->Draw(*scene);
 
@@ -147,14 +161,17 @@ void Renderer::Draw(RenderFrame& frame)
         GLERROR("Draw Text");
         PerformanceTimer::StopTimer("Renderer-Draw Text");
     }
+
     PerformanceTimer::StartTimer("Renderer-Draw Bloom");
     m_DrawBloomPass->Draw(m_DrawFinalPass->BloomTexture());
     PerformanceTimer::StopTimer("Renderer-Draw Bloom");
+
     if (m_DebugTextureToDraw == 0) {
         PerformanceTimer::StartTimer("Renderer-Color Correction Pass");
         m_DrawColorCorrectionPass->Draw(m_DrawFinalPass->SceneTexture(), m_DrawBloomPass->GaussianTexture(), m_DrawFinalPass->SceneTextureLowRes(), m_DrawFinalPass->BloomTextureLowRes(), frame.Gamma, frame.Exposure);
         PerformanceTimer::StopTimer("Renderer-Color Correction Pass");
     }
+
     PerformanceTimer::StartTimer("Renderer-Misc Debug Draws");
     if (m_DebugTextureToDraw == 1) {
         m_DrawScreenQuadPass->Draw(m_DrawFinalPass->SceneTexture());
@@ -174,7 +191,10 @@ void Renderer::Draw(RenderFrame& frame)
     if (m_DebugTextureToDraw == 6) {
         m_DrawScreenQuadPass->Draw(m_PickingPass->PickingTexture());
     }
-    PerformanceTimer::StopTimer("Renderer-Misc Debug Draws");
+	if (m_DebugTextureToDraw == 7) {
+		m_DrawScreenQuadPass->Draw(m_SSAOPass->SSAOTexture());
+	}
+	PerformanceTimer::StopTimer("Renderer-Misc Debug Draws");
 
     PerformanceTimer::StartTimer("Renderer-ImGuiRenderPass");
     m_ImGuiRenderPass->Draw();
@@ -223,4 +243,5 @@ void Renderer::InitializeRenderPasses()
     m_DrawScreenQuadPass = new DrawScreenQuadPass(this);
     m_DrawBloomPass = new DrawBloomPass(this);
     m_DrawColorCorrectionPass = new DrawColorCorrectionPass(this);
+	m_SSAOPass = new SSAOPass(this);
 }

src/Engine/Rendering/SSAOPass.cpp

@@ -0,0 +1,149 @@
+#include "Rendering/SSAOPass.h"
+
+SSAOPass::SSAOPass(IRenderer* renderer)
+{
+	m_Renderer = renderer;
+
+	m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.mesh");
+
+	InitializeBuffer();
+	InitializeShaderProgram();
+	Setting(0.1f, 0.012f, 1.0f, 1.0f, 13, 7);
+
+	m_DrawBloomPass = new DrawBloomPass(renderer);
+}
+
+void SSAOPass::InitializeShaderProgram()
+{
+	m_SSAOProgram = ResourceManager::Load<ShaderProgram>("##SSAOProgram");
+	m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
+	m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAO.frag.glsl")));
+	m_SSAOProgram->Compile();
+	m_SSAOProgram->Link();
+
+	m_SSAOViewSpaceZProgram = ResourceManager::Load<ShaderProgram>("##SSAOViewSpaceZProgram");
+	m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
+	m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAOViewSpaceZ.frag.glsl")));
+	m_SSAOViewSpaceZProgram->Compile();
+	m_SSAOViewSpaceZProgram->Link();
+}
+
+
+void SSAOPass::InitializeBuffer()
+{
+	glGenTextures(1, &m_SSAOTexture);
+	glBindTexture(GL_TEXTURE_2D, m_SSAOTexture);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, 0, GL_RED, GL_FLOAT, nullptr);
+	//glTexImage2D(GL_TEXTURE_2D, 0, GL_R32I, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, 0, GL_RED_INTEGER, GL_INT, nullptr);
+	//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, 0, GL_RGB, GL_FLOAT, nullptr);
+
+	m_SSAOFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOTexture, GL_COLOR_ATTACHMENT0)));
+	m_SSAOFramBuffer.Generate();
+
+	glGenTextures(1, &m_SSAOViewSpaceZTexture);
+	glBindTexture(GL_TEXTURE_2D, m_SSAOViewSpaceZTexture);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_R32F, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, 0, GL_RED, GL_FLOAT, nullptr);
+	//glTexStorage2D(GL_TEXTURE_2D, MAX_MIP_LEVEL, GL_R32F, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);;
+	//glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, GL_RED, GL_FLOAT, nullptr);
+	//glGenerateMipmap(GL_TEXTURE_2D);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	//glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+
+	m_SSAOViewSpaceZFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOViewSpaceZTexture, GL_COLOR_ATTACHMENT0)));
+	m_SSAOViewSpaceZFramBuffer.Generate();
+}
+
+void SSAOPass::ClearBuffer()
+{
+	m_SSAOFramBuffer.Bind();
+	glClearColor(1.f, 1.f, 1.f, 1.f);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	m_SSAOFramBuffer.Unbind();
+
+	m_SSAOViewSpaceZFramBuffer.Bind();
+	glClearColor(1.f, 1.f, 1.f, 1.f);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	m_SSAOViewSpaceZFramBuffer.Unbind();
+}
+
+void SSAOPass::Setting(float radius, float bias, float contrast, float intensityScale, int numOfSamples, int NumOfTurns) {
+	m_Radius = radius;
+	m_Bias = bias;
+	m_Contrast = contrast;
+	m_IntensityScale = intensityScale;
+	m_NumOfSamples = numOfSamples;
+	m_NumOfTurns = NumOfTurns;
+}
+
+
+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(
+		((1.0 - camera->ProjectionMatrix()[0][2]) / camera->ProjectionMatrix()[0][0]),
+		(-2.0 / (m_Renderer->GetViewportSize().Width * camera->ProjectionMatrix()[0][0])),
+		((1.0 + camera->ProjectionMatrix()[1][2]) / camera->ProjectionMatrix()[1][1]),
+		(-2.0 / (m_Renderer->GetViewportSize().Height * camera->ProjectionMatrix()[1][1]))
+		);
+
+	m_SSAOViewSpaceZFramBuffer.Unbind();
+
+	//glBindTexture(GL_TEXTURE_2D, m_SSAOViewSpaceZTexture);
+	//glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height, GL_RED, GL_FLOAT, &m_SSAOViewSpaceZTexture);
+	//glGenerateMipmap(GL_TEXTURE_2D); 
+
+	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, "uProjScale"), m_Renderer->GetViewportSize().Height / (-2.0f * glm::tan(glm::radians(camera->FOV()) * 0.5f)));
+
+	glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uRadius"), m_Radius);
+	glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uBias"), m_Bias);
+	glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uContrast"), m_Contrast);
+	glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uIntensityScale"), m_IntensityScale);
+	glUniform1i(glGetUniformLocation(SSAOShaderHandle, "uNumOfSamples"), m_NumOfSamples);
+	glUniform1i(glGetUniformLocation(SSAOShaderHandle, "uNumOfTurns"), m_NumOfTurns);;
+
+	glUniform4fv(glGetUniformLocation(SSAOShaderHandle, "uProjInfo"), 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);
+}

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()
+{
+
+}
+

src/Engine/Rendering/ShaderProgram.cpp

@@ -98,8 +98,7 @@ void ShaderProgram::AddShader(std::shared_ptr<Shader> shader)
 
 void ShaderProgram::Compile()
 {
-	if (m_ShaderProgramHandle == 0)
-	{
+	if (m_ShaderProgramHandle == 0)	{
 		m_ShaderProgramHandle = glCreateProgram();
 	}