From 8429280aee0fe7d163cf896be9e44db4e8196c89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Steffen=20F=C3=BCndgens?= <steffen.fuendgens@rwth-aachen.de>
Date: Fri, 23 Jan 2015 14:00:26 +0100
Subject: [PATCH] Fixed mirroring of shadows by inverting coordinates instead
 of blitting framebuffers(performance...).

---
 Shader/phong.fsh |  3 ++-
 graphics.cc      | 10 +---------
 graphics.hh      |  1 -
 3 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/Shader/phong.fsh b/Shader/phong.fsh
index 67c7679..447b1fe 100644
--- a/Shader/phong.fsh
+++ b/Shader/phong.fsh
@@ -71,7 +71,8 @@ float samplePointShadow(samplerCubeShadow shadowMap, vec3 lightDirection) {
     float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
     float compValue = 0.5*(-A*length(lightDirection) + B)/length(lightDirection) + 0.5;
     float bias = 0.005;
-    return texture(shadowMap, vec4(lightDirection.xyz , compValue - bias));
+    vec3 vector = vec3(-lightDirection.x, -lightDirection.y, lightDirection.z);
+    return texture(shadowMap, vec4(vector , compValue - bias));
 }
 
 float distanceToBorder(vec2 vector) {
diff --git a/graphics.cc b/graphics.cc
index f264a3f..d6820b8 100644
--- a/graphics.cc
+++ b/graphics.cc
@@ -68,8 +68,6 @@ void Graphics::init(Level* level) {
     depthTexture_cube->setWrapS(GL_CLAMP_TO_EDGE);
     depthTexture_cube->setWrapT(GL_CLAMP_TO_EDGE);
     depthTexture_cube->setCompareMode(GL_COMPARE_REF_TO_TEXTURE);
-    framebuffer_cube2 = SharedFrameBufferObject(new FrameBufferObject());
-    framebuffer_cube2->setDepthTexture(depthTexture_cube);
 }
 
 GLFWwindow* Graphics::getWindow() {
@@ -87,7 +85,7 @@ void Graphics::render()
     // render depth textures for point lights
     glViewport(0, 0, cube_size, cube_size);
     glm::mat4 depthProjectionMatrix_pointlights = glm::perspective(1.571f, (float)cube_size/(float)cube_size, 0.1f,  farPlane);
-    glm::vec3 looking_directions[6] = {glm::vec3(1.0f, 0.0f, 0.0f), glm::vec3(-1.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f),
+    glm::vec3 looking_directions[6] = {glm::vec3(-1.0f, 0.0f, 0.0f), glm::vec3(1.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f),
         glm::vec3(0.0f, -1.0f, 0.0f), glm::vec3(0.0f, 0.0f, 1.0f), glm::vec3(0.0f, 0.0f, -1.0f)};
 
     framebuffer_cube->bind();
@@ -103,12 +101,6 @@ void Graphics::render()
             glm::mat4 depthViewProjectionMatrix_face = depthProjectionMatrix_pointlights * glm::lookAt(level->getLights()->at(i_pointlight).getPosition(),
                 level->getLights()->at(i_pointlight).getPosition() + looking_directions[i_face], glm::vec3(0.0f, 1.0f, 0.0f));
             level->render(depthShader, false, &depthViewProjectionMatrix_face);
-            glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer_cube->getObjectName());
-            glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer_cube2->getObjectName());
-            glBlitFramebuffer(0, 0, cube_size, cube_size, cube_size, cube_size, 0, 0, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
-            glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer_cube2->getObjectName());
-            glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer_cube->getObjectName());
-            glBlitFramebuffer(0, 0, cube_size, cube_size, 0, 0, cube_size, cube_size, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
             if (!framebuffer_cube->isFrameBufferObjectComplete()) {
                 printf("Framebuffer incomplete, unknown error occured during shadow generation!\n");
             }
diff --git a/graphics.hh b/graphics.hh
index d9f92a3..71d3d97 100644
--- a/graphics.hh
+++ b/graphics.hh
@@ -32,7 +32,6 @@ class Graphics {
         ACGL::OpenGL::SharedFrameBufferObject framebuffer;
         std::vector<ACGL::OpenGL::SharedTextureCubeMap> depth_cubeMaps;
         ACGL::OpenGL::SharedFrameBufferObject framebuffer_cube;
-        ACGL::OpenGL::SharedFrameBufferObject framebuffer_cube2;
         ACGL::OpenGL::SharedTexture2D depthTexture_cube;
         static const int cube_size;
         Level* level;