From cb77c1ff974fcb1f031f9fc3a6d1e12714533917 Mon Sep 17 00:00:00 2001
From: FakeShemp <sakcheen@gmail.com>
Date: Wed, 10 Feb 2016 16:16:41 +0100
Subject: [PATCH] Working pcf, not optimized

---
 include/Engine/Rendering/ShadowPass.h   | 4 ++--
 resources/Shaders/ForwardPlus.frag.glsl | 9 ++++-----
 src/Engine/Rendering/ShadowPass.cpp     | 6 +++---
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/include/Engine/Rendering/ShadowPass.h b/include/Engine/Rendering/ShadowPass.h
index 5acc376e..7c93fcd8 100644
--- a/include/Engine/Rendering/ShadowPass.h
+++ b/include/Engine/Rendering/ShadowPass.h
@@ -58,8 +58,8 @@ private:
     glm::mat4 m_LightView;
     glm::mat4 m_LightSpaceMatrix;
 
-    GLuint resolutionSizeWidth = 2048 * 4;
-    GLuint resolutionSizeHeigth = 2048 * 4;
+    GLuint resolutionSizeWidth = 2048 * 2;
+    GLuint resolutionSizeHeigth = 2048 * 2;
 
     bool m_ShadowOn = true;
 };
diff --git a/resources/Shaders/ForwardPlus.frag.glsl b/resources/Shaders/ForwardPlus.frag.glsl
index 170a9d5a..ce71be28 100644
--- a/resources/Shaders/ForwardPlus.frag.glsl
+++ b/resources/Shaders/ForwardPlus.frag.glsl
@@ -121,16 +121,15 @@ float CalcShadowValue(vec4 positionLightSpace, vec3 normal, vec3 lightDir, sampl
 	//float bias = max(0.05 * (1.0 - dot(normal, lightDir)), 0.005);
 	//float bias = 0.005 * tan(acos(clamp(dot(normal, lightDir), 0,1))); bias = clamp(bias, 0,0.01);
 	
-    vec3 projCoords = positionLightSpace.xyz / positionLightSpace.w;
+    vec3 projCoords = vec3(positionLightSpace.xy, positionLightSpace.z + bias) / positionLightSpace.w;
     projCoords = projCoords * 0.5 + 0.5;
     //float shadowMapDepth = texture(depthTexture, projCoords.xy).r; 
-    float shadowMapDepth = 1.0 - texture(depthTexture, projCoords); 
+    float shadowMapDepth = texture(depthTexture, projCoords); 
 	float geometryDepth = projCoords.z;
 	//float shadow = geometryDepth - bias > shadowMapDepth ? 1.0 : 0.0;
-	//float shadow = geometryDepth - bias > shadowMapDepth ? 0.0 : 1.0;
-	float shadow = shadowMapDepth;
+	//float shadow = 1.0 - bias > shadowMapDepth ? 0.0 : 1.0;
 	
-	//float shadow = 0.0;
+	float shadow = 1.0 - shadowMapDepth;
 	
 	//vec2 texelSize = 1.0 / textureSize(depthTexture, 0);
 	//for(int x = -1; x <= 1; x++)
diff --git a/src/Engine/Rendering/ShadowPass.cpp b/src/Engine/Rendering/ShadowPass.cpp
index 5ffd553f..fbf25219 100644
--- a/src/Engine/Rendering/ShadowPass.cpp
+++ b/src/Engine/Rendering/ShadowPass.cpp
@@ -33,7 +33,7 @@ void ShadowPass::InitializeFrameBuffers()
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
-	glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
+	//glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
 
 
     m_DepthBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_DepthMap, GL_DEPTH_ATTACHMENT)));
@@ -71,7 +71,7 @@ void ShadowPass::Draw(RenderScene & scene)
 
     glViewport(0, 0, resolutionSizeWidth, resolutionSizeHeigth);
 
-	//glCullFace(GL_FRONT);
+	glCullFace(GL_FRONT);
     //state->Disable(GL_CULL_FACE);
 
     ImGui::DragFloat4("ShadowMapCam", m_LRBT, 1.f, -1000.f, 1000.f);
@@ -121,7 +121,7 @@ void ShadowPass::Draw(RenderScene & scene)
 
 
     glViewport(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
-    //glCullFace(GL_BACK);
+    glCullFace(GL_BACK);
     m_ShadowProgram->Unbind();