From cf836b151af4d20af69cfb67d087c0185f751bcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Steffen=20F=C3=BCndgens?= <steffen.fuendgens@rwth-aachen.de>
Date: Mon, 19 Jan 2015 18:22:25 +0100
Subject: [PATCH] Mirrored rendering of pointlight shadows, so that they are at
 the correct positions now, but occlude everything. -- Fabian

---
 graphics.cc | 20 +++++++++++++++++++-
 graphics.hh |  2 ++
 level.cc    |  2 +-
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/graphics.cc b/graphics.cc
index f3be9d8..0f5fc6f 100644
--- a/graphics.cc
+++ b/graphics.cc
@@ -61,6 +61,15 @@ void Graphics::init(Level* level) {
     }
 
     framebuffer_cube = SharedFrameBufferObject(new FrameBufferObject());
+
+    depthTexture_cube = SharedTexture2D( new Texture2D(windowSize, GL_DEPTH_COMPONENT16));
+    depthTexture_cube->setMinFilter(GL_NEAREST);
+    depthTexture_cube->setMagFilter(GL_NEAREST);
+    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() {
@@ -86,11 +95,20 @@ void Graphics::render()
     for (unsigned int i_pointlight = 0; i_pointlight<1 && i_pointlight<level->getLights()->size(); i_pointlight++) {
         // render each side of the cube
         for (int i_face = 0; i_face<6; i_face++) {
+            framebuffer_cube2->bind();
+            glClear(GL_DEPTH_BUFFER_BIT);
+            framebuffer_cube->bind();
             glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i_face, depth_cubeMaps.at(i_pointlight)->getObjectName(), 0);
             glClear(GL_DEPTH_BUFFER_BIT);
             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);
+            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 bb37a19..d9f92a3 100644
--- a/graphics.hh
+++ b/graphics.hh
@@ -32,6 +32,8 @@ 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;
 };
diff --git a/level.cc b/level.cc
index d6b90ca..b89610a 100644
--- a/level.cc
+++ b/level.cc
@@ -422,7 +422,7 @@ void Level::render(ACGL::OpenGL::SharedShaderProgram shader, bool lightingPass,
         glm::mat4* viewProjectionMatrix, std::vector<glm::mat4>* shadowVPs) {
     for(unsigned int i = 0; i<objects.size(); i++) {
         // do not project shadow of skydome 
-        if(lightingPass || objects.at(i) != skydome) {
+        if(lightingPass || (objects.at(i) != skydome && i!=0)) {
             objects.at(i)->render(shader, lightingPass, viewProjectionMatrix, shadowVPs);
         }
     }