Added everything... -.-

37 files changed, 1194 insertions, 134 deletions

diff --git a/BSPTree.cpp b/BSPTree.cpp
index fa2f1c0..a94c77a 100644
--- a/BSPTree.cpp
+++ b/BSPTree.cpp
@@ -1,5 +1,23 @@
-#include "BSPTree.h"
+/*
+ * BSPTree.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 
+#include "BSPTree.h"
 
 namespace Zoom {
 
@@ -9,20 +27,20 @@ vmml::vec3f BSPTree::Plane::intersection(const vmml::vec3f &p, const vmml::vec3f
   return p + r*dir;
 }
 
-void BSPTree::Plane::partition(const Triangle &t, std::list<Triangle> *front, std::list<Triangle> *back) const {
+void BSPTree::Plane::partition(const TriangleRecord &t, std::list<TriangleRecord> *front, std::list<TriangleRecord> *back) const {
   for(int i = 0; i < 3; ++i) {
-    if(contains(t.getVertex(i))) {
-      const vmml::vec3f *v[3] = {&t.getVertex(i), &t.getVertex((i+1)%3), &t.getVertex((i+2)%3)};
+    if(contains(t.triangle.getVertex(i))) {
+      const vmml::vec3f *v[3] = {&t.triangle.getVertex(i), &t.triangle.getVertex((i+1)%3), &t.triangle.getVertex((i+2)%3)};
 
       vmml::vec3f is = intersection(*v[1], *v[2]-*v[1]);
 
       if(isInFront(*v[1])) {
-        front->push_back(Triangle(*v[0], *v[1], is, t.getColor()));
-        back->push_back(Triangle(*v[0], is, *v[2], t.getColor()));
+        front->push_back(TriangleRecord(Triangle(*v[0], *v[1], is, t.triangle.getColor()), t.data));
+        back->push_back(TriangleRecord(Triangle(*v[0], is, *v[2], t.triangle.getColor()), t.data));
       }
       else {
-        back->push_back(Triangle(*v[0], *v[1], is, t.getColor()));
-        front->push_back(Triangle(*v[0], is, *v[2], t.getColor()));
+        back->push_back(TriangleRecord(Triangle(*v[0], *v[1], is, t.triangle.getColor()), t.data));
+        front->push_back(TriangleRecord(Triangle(*v[0], is, *v[2], t.triangle.getColor()), t.data));
       }
 
       return;
@@ -30,7 +48,7 @@ void BSPTree::Plane::partition(const Triangle &t, std::list<Triangle> *front, st
   }
 
   for(int i = 0; i < 3; ++i) {
-    const vmml::vec3f *v[3] = {&t.getVertex(i), &t.getVertex((i+1)%3), &t.getVertex((i+2)%3)};
+    const vmml::vec3f *v[3] = {&t.triangle.getVertex(i), &t.triangle.getVertex((i+1)%3), &t.triangle.getVertex((i+2)%3)};
 
     if((isInFront(*v[0]) && isBehind(*v[1]) && isBehind(*v[2]))
         || (isBehind(*v[0]) && isInFront(*v[1]) && isInFront(*v[2]))) {
@@ -38,14 +56,14 @@ void BSPTree::Plane::partition(const Triangle &t, std::list<Triangle> *front, st
       vmml::vec3f is2 = intersection(*v[0], *v[2]-*v[0]);
 
       if(isInFront(*v[0])) {
-        front->push_back(Triangle(*v[0], is1, is2, t.getColor()));
-        back->push_back(Triangle(is1, *v[1], is2, t.getColor()));
-        back->push_back(Triangle(*v[1], *v[2], is2, t.getColor()));
+        front->push_back(TriangleRecord(Triangle(*v[0], is1, is2, t.triangle.getColor()), t.data));
+        back->push_back(TriangleRecord(Triangle(is1, *v[1], is2, t.triangle.getColor()), t.data));
+        back->push_back(TriangleRecord(Triangle(*v[1], *v[2], is2, t.triangle.getColor()), t.data));
       }
       else {
-        back->push_back(Triangle(*v[0], is1, is2, t.getColor()));
-        front->push_back(Triangle(is1, *v[1], is2, t.getColor()));
-        front->push_back(Triangle(*v[1], *v[2], is2, t.getColor()));
+        back->push_back(TriangleRecord(Triangle(*v[0], is1, is2, t.triangle.getColor()), t.data));
+        front->push_back(TriangleRecord(Triangle(is1, *v[1], is2, t.triangle.getColor()), t.data));
+        front->push_back(TriangleRecord(Triangle(*v[1], *v[2], is2, t.triangle.getColor()), t.data));
       }
 
       return;
@@ -54,7 +72,7 @@ void BSPTree::Plane::partition(const Triangle &t, std::list<Triangle> *front, st
 }
 
 
-BSPTree::BSPTree(const std::list<Triangle> &triangles) : frontTree(0), backTree(0) {
+BSPTree::BSPTree(const std::list<TriangleRecord> &triangles) : frontTree(0), backTree(0) {
   const Triangle *planeT = findNearestTriangle(triangles, findCenter(triangles));
 
   if(!planeT)
@@ -62,29 +80,26 @@ BSPTree::BSPTree(const std::list<Triangle> &triangles) : frontTree(0), backTree(
 
   plane = Plane(*planeT);
 
-  std::list<Triangle> front, back;
+  std::list<TriangleRecord> front, back;
 
-  for(std::list<Triangle>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
-    if(t->getNormal().squared_length() == 0)
+  for(std::list<TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+    if(t->triangle.isDegenerate())
       continue;
 
-    if(plane.contains(*t)) {
+    if(plane.contains(t->triangle)) {
       this->triangles.push_back(*t);
       continue;
     }
-    else if(plane.isInFront(*t)) {
+    else if(plane.isInFront(t->triangle)) {
       front.push_back(*t);
       continue;
     }
-    else if(plane.isBehind(*t)) {
+    else if(plane.isBehind(t->triangle)) {
       back.push_back(*t);
       continue;
     }
 
-    std::list<Triangle> frontPart, backPart;
-    plane.partition(*t, &frontPart, &backPart);
-    front.splice(front.end(), frontPart);
-    back.splice(back.end(), backPart);
+    plane.partition(*t, &front, &back);
   }
 
   if(!front.empty())
@@ -117,28 +132,28 @@ BSPTree& BSPTree::operator=(const BSPTree &tree) {
   return *this;
 }
 
-vmml::vec3f BSPTree::findCenter(const std::list<Triangle> &triangles) {
+vmml::vec3f BSPTree::findCenter(const std::list<TriangleRecord> &triangles) {
   vmml::vec3f v;
 
-  for(std::list<Triangle>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
-    v += t->getCenter();
+  for(std::list<TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+    v += t->triangle.getCenter();
   }
 
   return v/triangles.size();
 }
 
-const Triangle* BSPTree::findNearestTriangle(const std::list<Triangle> &triangles, const vmml::vec3f &v) {
+const Triangle* BSPTree::findNearestTriangle(const std::list<TriangleRecord> &triangles, const vmml::vec3f &v) {
   const Triangle *current = 0;
   float distanceSq;
 
-  for(std::list<Triangle>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
-    if(t->getNormal().squared_length() == 0)
+  for(std::list<TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+    if(t->triangle.isDegenerate())
       continue;
 
-    float d = t->getCenter().squared_distance(v);
+    float d = t->triangle.getCenter().squared_distance(v);
 
     if(!current || d < distanceSq) {
-      current = &*t;
+      current = &t->triangle;
       distanceSq = d;
     }
   }
diff --git a/BSPTree.h b/BSPTree.h
index 47ba411..1944ef1 100644
--- a/BSPTree.h
+++ b/BSPTree.h
@@ -1,20 +1,61 @@
+/*
+ * BSPTree.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef ZOOM_BSPTREE_H_
 #define ZOOM_BSPTREE_H_
 
 #include "Triangle.h"
 #include <list>
 #include <cmath>
+
 #include <vmmlib/vector.hpp>
+#include <boost/shared_ptr.hpp>
 
 namespace Zoom {
 
 class BSPTree {
+  public:
+    class TriangleData {
+      protected:
+      TriangleData() {}
+
+      public:
+      virtual ~TriangleData() {}
+    };
+
+    struct TriangleRecord {
+      public:
+        TriangleRecord(Triangle triangle0, boost::shared_ptr<TriangleData> data0)
+        : triangle(triangle0), data(data0) {}
+        TriangleRecord(Triangle triangle0) : triangle(triangle0) {}
+        TriangleRecord() {}
+
+        Triangle triangle;
+        boost::shared_ptr<TriangleData> data;
+    };
+
   private:
     class Plane {
       public:
         Plane() : d(0) {}
         Plane(const vmml::vec3f &n, float d0) : normal(n), d(d0) {}
-        Plane(const Triangle &t) : normal(t.getNormal()), d(t.getVertex(0).dot(normal)) {}
+        Plane(const Triangle &t) : normal(t.computeNormal()), d(t.getVertex(0).dot(normal)) {}
 
         bool contains(const vmml::vec3f &v) const {
           return (fabsf(normal.dot(v) - d) < 1E-6);
@@ -62,7 +103,7 @@ class BSPTree {
         }
 
         vmml::vec3f intersection(const vmml::vec3f &p, const vmml::vec3f &dir) const;
-        void partition(const Triangle &t, std::list<Triangle> *front, std::list<Triangle> *back) const;
+        void partition(const TriangleRecord &t, std::list<TriangleRecord> *front, std::list<TriangleRecord> *back) const;
 
       private:
         vmml::vec3f normal;
@@ -70,7 +111,7 @@ class BSPTree {
     };
 
   public:
-    BSPTree(const std::list<Triangle> &triangles);
+    BSPTree(const std::list<TriangleRecord> &triangles);
 
     BSPTree(const BSPTree &tree) : frontTree(0), backTree(0) {
       *this = tree;
@@ -87,16 +128,6 @@ class BSPTree {
     BSPTree& operator=(const BSPTree &tree);
 
     template<typename T>
-    void visit(const T& visitor, const vmml::vec3f &p) {
-      doVisit<const T>(visitor, p);
-    }
-
-    template<typename T>
-    void visit(T& visitor, const vmml::vec3f &p) {
-      doVisit(visitor, p);
-    }
-
-    template<typename T>
     void visit(const T& visitor, const vmml::vec3f &p) const {
       doVisit<const T>(visitor, p);
     }
@@ -108,42 +139,16 @@ class BSPTree {
 
   private:
     Plane plane;
-    std::list<Triangle> triangles;
+    std::list<TriangleRecord> triangles;
     BSPTree *frontTree, *backTree;
 
     template<typename T>
-    void doVisit(T& visitor, const vmml::vec3f &p) {
-      if(plane.isBehind(p)) {
-        if(frontTree)
-          frontTree->visit(visitor, p);
-
-        for(std::list<Triangle>::iterator t = triangles.begin(); t != triangles.end(); ++t) {
-          visitor(*t);
-        }
-
-        if(backTree)
-          backTree->visit(visitor, p);
-      }
-      else {
-        if(backTree)
-          backTree->visit(visitor, p);
-
-        for(std::list<Triangle>::iterator t = triangles.begin(); t != triangles.end(); ++t) {
-          visitor(*t);
-        }
-
-        if(frontTree)
-          frontTree->visit(visitor, p);
-      }
-    }
-
-    template<typename T>
     void doVisit(T& visitor, const vmml::vec3f &p) const {
       if(plane.isBehind(p)) {
         if(frontTree)
           frontTree->visit(visitor, p);
 
-        for(std::list<Triangle>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+        for(std::list<TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
           visitor(*t);
         }
 
@@ -154,7 +159,7 @@ class BSPTree {
         if(backTree)
           backTree->visit(visitor, p);
 
-        for(std::list<Triangle>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+        for(std::list<TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
           visitor(*t);
         }
 
@@ -163,8 +168,8 @@ class BSPTree {
       }
     }
 
-    static vmml::vec3f findCenter(const std::list<Triangle> &triangles);
-    static const Triangle* findNearestTriangle(const std::list<Triangle> &triangles, const vmml::vec3f &v);
+    static vmml::vec3f findCenter(const std::list<TriangleRecord> &triangles);
+    static const Triangle* findNearestTriangle(const std::list<TriangleRecord> &triangles, const vmml::vec3f &v);
 };
 
 }
diff --git a/CMakeLists.txt b/CMakeLists.txt
index da27b7b..6135c41 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,18 +1,25 @@
 cmake_minimum_required(VERSION 2.6)
 project(ZOOM)
 
+set(CMAKE_MODULE_PATH ${ZOOM_SOURCE_DIR})
+
+find_package(Boost REQUIRED)
 find_package(OpenGL REQUIRED)
+find_package(GLPng REQUIRED)
+find_package(LibXml2 REQUIRED)
 
-include_directories(${OPENGL_INCLUDE_DIR})
+include_directories(${Boost_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ${GLPNG_INCLUDE_DIR} ${LIBXML2_INCLUDE_DIR})
 
 add_executable(zoom
   BSPTree.cpp BSPTree.h
   Game.cpp Game.h
   config.h
   gl.h
+  Level.cpp Level.h
   Renderer.cpp Renderer.h
+  Texture.cpp Texture.h
   Triangle.h
   zoom.cpp
 )
 
-target_link_libraries(zoom ${OPENGL_LIBRARIES})
+target_link_libraries(zoom ${Boost_LIBRARIES} ${OPENGL_LIBRARIES} ${GLPNG_LIBRARY} ${LIBXML2_LIBRARIES})
diff --git a/FindGLPng.cmake b/FindGLPng.cmake
new file mode 100644
index 0000000..f02b772
--- /dev/null
+++ b/FindGLPng.cmake
@@ -0,0 +1,16 @@
+FIND_PATH(GLPNG_INCLUDE_DIR GL/glpng.h)
+FIND_LIBRARY(GLPNG_LIBRARY NAMES glpng) 
+
+IF (GLPNG_INCLUDE_DIR AND GLPNG_LIBRARY)
+   SET(GLPNG_FOUND TRUE)
+ENDIF (GLPNG_INCLUDE_DIR AND GLPNG_LIBRARY)
+
+IF (GLPNG_FOUND)
+   IF (NOT GLPng_FIND_QUIETLY)
+      MESSAGE(STATUS "Found glpng: ${GLPNG_LIBRARY}")
+   ENDIF (NOT GLPng_FIND_QUIETLY)
+ELSE (GLPNG_FOUND)
+   IF (GLPng_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find glpng")
+   ENDIF (GLPng_FIND_REQUIRED)
+ENDIF (GLPNG_FOUND)
diff --git a/Game.cpp b/Game.cpp
index bd028c2..46f942f 100644
--- a/Game.cpp
+++ b/Game.cpp
@@ -19,6 +19,7 @@
 
 #include "Game.h"
 #include "BSPTree.h"
+#include "Level.h"
 #include "Triangle.h"
 #include "gl.h"
 
@@ -26,8 +27,9 @@ namespace Zoom {
 
 Game::Game(bool multisample) : angle(0) {
   glClearColor(0.0, 0.0, 0.0, 1.0);
-  //glEnable(GL_DEPTH_TEST);
-  //glDepthFunc(GL_LEQUAL);
+  glClearDepth(1.0);
+  glEnable(GL_DEPTH_TEST);
+  glDepthFunc(GL_LEQUAL);
 
   //glEnable(GL_BLEND);
   //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
@@ -37,43 +39,52 @@ Game::Game(bool multisample) : angle(0) {
     glEnable(GL_MULTISAMPLE_ARB);
 #endif
 
-  /*glEnable(GL_LIGHTING);
-  static const float light[] = {1, 1, 1, 0};
+  glShadeModel(GL_SMOOTH);
+
+  glEnable(GL_LIGHTING);
+  static const float light[] = {0, 0, 0, 1};
   static const float lightColor[] = {1, 1, 1, 1};
   glLightfv(GL_LIGHT0, GL_POSITION, light);
   glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
-  glEnable(GL_LIGHT0);*/
+  glEnable(GL_LIGHT0);
+
+  glEnable(GL_COLOR_MATERIAL);
+  glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
 
-  //glEnable(GL_CULL_FACE);
-  //glFrontFace(GL_CCW);
+  glEnable(GL_CULL_FACE);
+  glFrontFace(GL_CCW);
 
   glLoadIdentity();
-  glTranslatef(0, 0, -5);
+
+  loadLevel("level.xml");
+}
+
+bool Game::loadLevel(const std::string &name) {
+  level = Level::loadLevel(name);
+
+  return level;
 }
 
 void Game::run(int delta) {
-  angle += delta*0.2;
+  angle += delta*0.01;
 
   if(angle >= 360)
     angle -= 360;
 }
 
 void Game::render() {
-  std::list<Triangle> triangles;
-
-  triangles.push_back(Triangle(vmml::vec3f(-1, -1, 0), vmml::vec3f(1, -1, 0), vmml::vec3f(1, 1, 0), vmml::vec3f(0, 1, 0)));
-  triangles.push_back(Triangle(vmml::vec3f(-1, -1, 0), vmml::vec3f(-1, 1, 0), vmml::vec3f(1, 1, 0), vmml::vec3f(0, 1, 0)));
-  triangles.push_back(Triangle(vmml::vec3f(-1, -1, -1), vmml::vec3f(1, -1, -1), vmml::vec3f(1, 1, -1), vmml::vec3f(0, 0, 1)));
-  triangles.push_back(Triangle(vmml::vec3f(-1, -1, -1), vmml::vec3f(-1, 1, -1), vmml::vec3f(1, 1, -1), vmml::vec3f(0, 0, 1)));
+  std::list<BSPTree::TriangleRecord> triangles;
 
-  BSPTree tree(triangles);
+  triangles.insert(triangles.end(), level->getRooms().front().walls.begin(), level->getRooms().front().walls.end());
 
-  glClear(GL_COLOR_BUFFER_BIT);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
   glPushMatrix();
   glRotatef(angle, 1, 2, 1);
+  //glRotatef(3*angle, 0, -1, 2);
+  //glRotatef(5*angle, 2, -1, 0);
 
-  renderer.render(tree);
+  renderer.render(triangles);
 
   glPopMatrix();
 }
diff --git a/Game.h b/Game.h
index dbd129a..7960497 100644
--- a/Game.h
+++ b/Game.h
@@ -21,20 +21,26 @@
 #define ZOOM_GAME_H_
 
 #include "Renderer.h"
+#include <boost/shared_ptr.hpp>
+#include <string>
 
 namespace Zoom {
 
+class Level;
 class Triangle;
 
 class Game {
   public:
     Game(bool multisample);
 
+    bool loadLevel(const std::string &name);
+
     void run(int delta);
     void render();
 
   private:
     Renderer renderer;
+    boost::shared_ptr<Level> level;
 
     float angle;
 };
diff --git a/Level.cpp b/Level.cpp
new file mode 100644
index 0000000..2867ab9
--- /dev/null
+++ b/Level.cpp
@@ -0,0 +1,260 @@
+/*
+ * Level.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Level.h"
+#include "Texture.h"
+#include <libxml/tree.h>
+#include <libxml/valid.h>
+
+#include <iostream>
+
+namespace Zoom {
+
+boost::shared_ptr<Level> Level::loadLevel(const std::string &filename) {
+  boost::shared_ptr<Level> level;
+
+  xmlDocPtr doc = xmlParseFile(("levels/"+filename).c_str());
+
+  if(doc) {
+    if(validateLevel(doc)) {
+      xmlNodePtr root = xmlDocGetRootElement(doc);
+      if(root && !xmlStrcmp(root->name, (xmlChar*)"level")) {
+        level = boost::shared_ptr<Level>(new Level);
+
+        for(xmlNodePtr node = root->children; node != 0; node = node->next) {
+          if(node->type != XML_ELEMENT_NODE)
+            continue;
+
+          if(!xmlStrcmp(node->name, (xmlChar*)"info")) {
+            level->loadLevelInfo(node);
+          }
+          else if(!xmlStrcmp(node->name, (xmlChar*)"rooms")) {
+            level->loadRooms(node);
+          }
+          else if(!xmlStrcmp(node->name, (xmlChar*)"textures")) {
+            level->loadTextures(node);
+          }
+        }
+
+        for(std::list<Room>::iterator room = level->rooms.begin(); room != level->rooms.end(); ++room) {
+          for(std::list<BSPTree::TriangleRecord>::iterator wall = room->walls.begin(); wall != room->walls.end(); ++wall) {
+            boost::shared_ptr<WallData> wallData = boost::dynamic_pointer_cast<WallData>(wall->data);
+
+            if(!wallData->texture.empty()) {
+              std::map<std::string, unsigned>::iterator texture = level->textures.find(wallData->texture);
+
+              if(texture != level->textures.end())
+                wall->triangle.setTexture(texture->second);
+            }
+          }
+        }
+      }
+    }
+
+    xmlFreeDoc(doc);
+  }
+
+  xmlCleanupParser();
+
+  return level;
+}
+
+void Level::loadLevelInfo(xmlNodePtr infoNode) {
+  for(xmlNodePtr node = infoNode->children; node != 0; node = node->next) {
+    if(node->type != XML_ELEMENT_NODE)
+      continue;
+
+    if(!xmlStrcmp(node->name, (xmlChar*)"name")) {
+      xmlChar *data = xmlNodeGetContent(node);
+      name = (char*)data;
+      xmlFree(data);
+    }
+    else if(!xmlStrcmp(node->name, (xmlChar*)"desc")) {
+      xmlChar *data = xmlNodeGetContent(node);
+      description = (char*)data;
+      xmlFree(data);
+    }
+    else if(!xmlStrcmp(node->name, (xmlChar*)"start")) {
+      startPoint = loadVector(node);
+    }
+  }
+}
+
+void Level::loadRooms(xmlNodePtr roomsNode) {
+  for(xmlNodePtr node = roomsNode->children; node != 0; node = node->next) {
+    if(node->type == XML_ELEMENT_NODE && !xmlStrcmp(node->name, (xmlChar*)"room")) {
+      loadRoom(node);
+    }
+  }
+}
+
+void Level::loadRoom(xmlNodePtr roomNode) {
+  rooms.push_back(Room());
+
+  xmlChar *data = xmlGetProp(roomNode, (xmlChar*)"id");
+  if(data) {
+    rooms.back().id = (char*)data;
+
+    xmlFree(data);
+  }
+
+  for(xmlNodePtr node = roomNode->children; node != 0; node = node->next) {
+    if(node->type == XML_ELEMENT_NODE && !xmlStrcmp(node->name, (xmlChar*)"triangle")) {
+      rooms.back().walls.push_back(loadWall(node));
+    }
+  }
+}
+
+void Level::loadTextures(xmlNodePtr texturesNode) {
+  for(xmlNodePtr node = texturesNode->children; node != 0; node = node->next) {
+    if(node->type == XML_ELEMENT_NODE && !xmlStrcmp(node->name, (xmlChar*)"texture")) {
+      std::string id, name;
+
+      xmlChar *data = xmlGetProp(node, (xmlChar*)"id");
+      if(data) {
+        id = (char*)data;
+        xmlFree(data);
+      }
+
+      data = xmlGetProp(node, (xmlChar*)"name");
+      if(data) {
+        name = (char*)data;
+        xmlFree(data);
+      }
+
+      if(!id.empty() && !name.empty()) {
+        unsigned texture = Texture::loadTexture(name);
+
+        if(texture) {
+          textures.insert(std::make_pair(id, texture));
+        }
+      }
+    }
+  }
+}
+
+BSPTree::TriangleRecord Level::loadWall(xmlNodePtr wallNode) {
+  boost::shared_ptr<WallData> wallData(new WallData);
+
+  BSPTree::TriangleRecord wall;
+  wall.data = wallData;
+
+
+  xmlChar *data = xmlGetProp(wallNode, (xmlChar*)"texture");
+  if(data) {
+    wallData->texture = (char*)data;
+    xmlFree(data);
+  }
+
+  int vertexNum = -1;
+
+  for(xmlNodePtr node = wallNode->children; node != 0; node = node->next) {
+    if(node->type != XML_ELEMENT_NODE)
+      continue;
+
+    if(!xmlStrcmp(node->name, (xmlChar*)"vertex")) {
+      if(++vertexNum > 2)
+        break;
+
+      wall.triangle.setVertex(vertexNum, loadVector(node));
+    }
+    else if(!xmlStrcmp(node->name, (xmlChar*)"normal")) {
+      if(vertexNum < 0)
+        continue;
+
+      wall.triangle.setNormal(vertexNum, loadVector(node));
+    }
+    else if(!xmlStrcmp(node->name, (xmlChar*)"texcoords")) {
+      if(vertexNum < 0) continue;
+
+      data = xmlGetProp(node, (xmlChar*)"s");
+      if(data) {
+        wall.triangle.getTexCoords(vertexNum)[0] = atof((char*)data);
+        xmlFree(data);
+      }
+
+      data = xmlGetProp(node, (xmlChar*)"t");
+      if(data) {
+        wall.triangle.getTexCoords(vertexNum)[1] = atof((char*)data);
+        xmlFree(data);
+      }
+    }
+  }
+
+  vmml::vec3f normal = wall.triangle.computeNormal();
+
+  if(normal.squared_length() > 0) {
+    normal.normalize();
+
+    for(int i = 0; i < 3; ++i) {
+      if(wall.triangle.getNormal(i).squared_length() == 0)
+        wall.triangle.setNormal(i, normal);
+    }
+  }
+
+
+  return wall;
+}
+
+vmml::vec3f Level::loadVector(xmlNodePtr node) {
+  vmml::vec3f ret(vmml::vec3f::ZERO);
+
+  xmlChar *data = xmlGetProp(node, (xmlChar*)"x");
+  if(data) {
+    ret.x() = atof((char*)data);
+    xmlFree(data);
+  }
+
+  data = xmlGetProp(node, (xmlChar*)"y");
+  if(data) {
+    ret.y() = atof((char*)data);
+    xmlFree(data);
+  }
+
+  data = xmlGetProp(node, (xmlChar*)"z");
+  if(data) {
+    ret.z() = atof((char*)data);
+    xmlFree(data);
+  }
+
+  return ret;
+}
+
+bool Level::validateLevel(xmlDocPtr doc) {
+  bool ret = false;
+
+  xmlDtdPtr dtd = xmlParseDTD((xmlChar*)"-//libzoom//DTD level 0.1//EN", (xmlChar*)"levels/level.dtd");
+
+  if(dtd) {
+    xmlValidCtxtPtr validCtxt = xmlNewValidCtxt();
+
+    if(validCtxt) {
+      if(xmlValidateDtd(validCtxt, doc, dtd))
+        ret = true;
+
+      xmlFreeValidCtxt(validCtxt);
+    }
+
+    xmlFreeDtd(dtd);
+  }
+
+  return ret;
+}
+
+}
diff --git a/Level.h b/Level.h
new file mode 100644
index 0000000..277b6e7
--- /dev/null
+++ b/Level.h
@@ -0,0 +1,74 @@
+/*
+ * Level.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ZOOM_LEVEL_H_
+#define ZOOM_LEVEL_H_
+
+#include "BSPTree.h"
+
+#include <string>
+#include <map>
+#include <list>
+
+#include <boost/shared_ptr.hpp>
+#include <libxml/parser.h>
+#include <vmmlib/vector.hpp>
+
+namespace Zoom {
+
+class Level {
+  public:
+    static boost::shared_ptr<Level> loadLevel(const std::string &filename);
+
+    struct WallData : public BSPTree::TriangleData {
+      std::string texture;
+    };
+
+    struct Room {
+      std::string id;
+      std::list<BSPTree::TriangleRecord> walls;
+    };
+
+    const std::list<Room> &getRooms() const {
+      return rooms;
+    }
+
+  private:
+    std::list<Room> rooms;
+    std::map<std::string, unsigned> textures;
+
+    std::string name, description;
+    vmml::vec3f startPoint;
+
+    Level() {}
+
+    void loadLevelInfo(xmlNodePtr infoNode);
+    void loadRooms(xmlNodePtr roomsNode);
+    void loadRoom(xmlNodePtr roomNode);
+    void loadTextures(xmlNodePtr texturesNode);
+
+    static BSPTree::TriangleRecord loadWall(xmlNodePtr wallNode);
+    static vmml::vec3f loadVector(xmlNodePtr node);
+
+    static bool validateLevel(xmlDocPtr doc);
+};
+
+}
+
+#endif /* ZOOM_LEVEL_H_ */
diff --git a/Renderer.cpp b/Renderer.cpp
index bf9aadb..558e415 100644
--- a/Renderer.cpp
+++ b/Renderer.cpp
@@ -19,11 +19,10 @@
 
 #include "Renderer.h"
 #include "BSPTree.h"
+#include "gl.h"
 
 namespace Zoom {
 
-const Renderer::RenderVisitor Renderer::renderVisitor = Renderer::RenderVisitor();
-
 void Renderer::render(const BSPTree &tree) {
   vmml::mat4f transform, inverseTransform;
   glGetFloatv(GL_MODELVIEW_MATRIX, transform.array);
@@ -38,14 +37,39 @@ void Renderer::render(const BSPTree &tree) {
 
 }
 
+void Renderer::render(const std::list<BSPTree::TriangleRecord> &triangles) {
+  glBegin(GL_TRIANGLES);
+  for(std::list<BSPTree::TriangleRecord>::const_iterator t = triangles.begin(); t != triangles.end(); ++t) {
+    renderTriangle(t->triangle);
+  }
+  glEnd();
+}
+
 void Renderer::renderTriangle(const Triangle &t) {
   glColor4fv(t.getColor().array);
-  glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, t.getColor().array);
-  glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, (t.getColor()/2).array);
 
-  glNormal3fv(t.getNormal().array);
+  if(t.getTexture() != lastTexture) {
+    glEnd();
+
+    if(t.getTexture()) {
+      glBindTexture(GL_TEXTURE_2D, t.getTexture());
+
+      if(!lastTexture) {
+        glEnable(GL_TEXTURE_2D);
+      }
+    }
+    else {
+      glDisable(GL_TEXTURE_2D);
+    }
+
+    lastTexture = t.getTexture();
+
+    glBegin(GL_TRIANGLES);
+  }
 
   for(int i = 0; i < 3; ++i) {
+    glTexCoord2fv(t.getTexCoords(i).array);
+    glNormal3fv(t.getNormal(i).array);
     glVertex3fv(t.getVertex(i).array);
   }
 }
diff --git a/Renderer.h b/Renderer.h
index d64a4fe..d72b5bb 100644
--- a/Renderer.h
+++ b/Renderer.h
@@ -20,25 +20,35 @@
 #ifndef ZOOM_RENDERER_H_
 #define ZOOM_RENDERER_H_
 
-namespace Zoom {
+#include "BSPTree.h"
 
-class Triangle;
-class BSPTree;
+namespace Zoom {
 
 class Renderer {
   public:
+    Renderer() : lastTexture(0), renderVisitor(this) {}
+
     void render(const BSPTree &tree);
+    void render(const std::list<BSPTree::TriangleRecord> &triangles);
 
   private:
-    static void renderTriangle(const Triangle &t);
+    void renderTriangle(const Triangle &t);
 
-    struct RenderVisitor {
-        void operator() (const Triangle &t) const {
-          renderTriangle(t);
+    class RenderVisitor {
+      public:
+        RenderVisitor(Renderer *renderer0) : renderer(renderer0) {}
+
+        void operator() (const BSPTree::TriangleRecord &t) const {
+          renderer->renderTriangle(t.triangle);
         }
+
+      private:
+        Renderer *renderer;
     };
 
-    static const RenderVisitor renderVisitor;
+    unsigned lastTexture;
+
+    const RenderVisitor renderVisitor;
 };
 
 }
diff --git a/Texture.cpp b/Texture.cpp
new file mode 100644
index 0000000..d5ec1f2
--- /dev/null
+++ b/Texture.cpp
@@ -0,0 +1,44 @@
+/*
+ * Texture.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Texture.h"
+#include "gl.h"
+#include <GL/glpng.h>
+
+namespace Zoom {
+
+std::map<std::string, unsigned> Texture::textures;
+
+unsigned Texture::loadTexture(const std::string &name) {
+  std::map<std::string, unsigned>::iterator it = textures.find(name);
+
+  if(it != textures.end())
+    return it->second;
+
+  pngInfo info;
+  unsigned texture = pngBind(("tex/" + name).c_str(), PNG_NOMIPMAP, PNG_ALPHA, &info, GL_REPEAT, GL_LINEAR, GL_LINEAR);
+
+  if(texture) {
+    textures.insert(std::make_pair(name, texture));
+  }
+
+  return texture;
+}
+
+}
diff --git a/Texture.h b/Texture.h
new file mode 100644
index 0000000..fd078f3
--- /dev/null
+++ b/Texture.h
@@ -0,0 +1,40 @@
+/*
+ * Texture.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ZOOM_TEXTURE_H_
+#define ZOOM_TEXTURE_H_
+
+#include <string>
+#include <map>
+
+namespace Zoom {
+
+class Texture {
+  public:
+    static unsigned loadTexture(const std::string &name);
+
+  private:
+    Texture();
+
+    static std::map<std::string, unsigned> textures;
+};
+
+}
+
+#endif /* ZOOM_TEXTURE_H_ */
diff --git a/Triangle.h b/Triangle.h
index 16b0d73..2b34c3f 100644
--- a/Triangle.h
+++ b/Triangle.h
@@ -1,7 +1,25 @@
+/*
+ * Triangle.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef ZOOM_TRIANGLE_H_
 #define ZOOM_TRIANGLE_H_
 
-#include "gl.h"
 #include <vmmlib/vector.hpp>
 #include <vmmlib/matrix.hpp>
 
@@ -9,36 +27,76 @@ namespace Zoom {
 
 class Triangle {
   public:
-    Triangle() : c(vmml::vec4f::ONE) {
-      v[0] = v[1] = v[2] = vmml::vec3f::ZERO;
+    Triangle() : color(vmml::vec4f::ONE), texture(0) {
+      vertices[0] = vertices[1] = vertices[2] = vmml::vec3f::ZERO;
+      normals[0] = normals[1] = normals[2] = vmml::vec3f::ZERO;
+      texcoords[0] = texcoords[1] = texcoords[2] = vmml::vec2f::ZERO;
     }
 
-    Triangle(const vmml::vec3f &v1, const vmml::vec3f &v2, const vmml::vec3f &v3, const vmml::vec4f &c0) : c(c0) {
-      v[0] = v1;
-      v[1] = v2;
-      v[2] = v3;
+    Triangle(const vmml::vec3f &v1, const vmml::vec3f &v2, const vmml::vec3f &v3, const vmml::vec4f &color0) : color(color0), texture(0) {
+      vertices[0] = v1;
+      vertices[1] = v2;
+      vertices[2] = v3;
+
+      normals[0] = normals[1] = normals[2] = vmml::vec3f::ZERO;
+      texcoords[0] = texcoords[1] = texcoords[2] = vmml::vec2f::ZERO;
     }
     
-    const vmml::vec3f& getVertex(int i) const {return v[i];}
-    const vmml::vec4f& getColor() const {return c;}
+    const vmml::vec3f& getVertex(int i) const {return vertices[i];}
+    vmml::vec3f& getVertex(int i) {return vertices[i];}
+    void setVertex(int i, vmml::vec3f v) {
+      vertices[i] = v;
+    }
+
+    const vmml::vec3f& getNormal(int i) const {return normals[i];}
+    vmml::vec3f& getNormal(int i) {return normals[i];}
+    void setNormal(int i, vmml::vec3f n) {
+      normals[i] = n;
+    }
+
+    const vmml::vec2f& getTexCoords(int i) const {return texcoords[i];}
+    vmml::vec2f& getTexCoords(int i) {return texcoords[i];}
+    void setTexCoords(int i, vmml::vec2f t) {
+      texcoords[i] = t;
+    }
+
+    unsigned getTexture() const {
+      return texture;
+    }
+    void setTexture(unsigned tex) {
+      texture = tex;
+    }
+
+    const vmml::vec4f& getColor() const {return color;}
+    vmml::vec4f& getColor() {return color;}
+    void setColor(vmml::vec4f c) {
+      color = c;
+    }
     
-    vmml::vec3f getNormal() const {
-      return v[0].compute_normal(v[1], v[2]);
+    vmml::vec3f computeNormal() const {
+      return vertices[0].compute_normal(vertices[1], vertices[2]);
     }
     
-    void transform(const vmml::mat4f &m) {
+    bool isDegenerate() const {
+      return (computeNormal().squared_length() == 0);
+    }
+
+    void transform(const vmml::mat4f &matrix) {
       for(int i = 0; i < 3; ++i) {
-        v[i] = m*v[i];
+        vertices[i] = matrix*vertices[i];
       }
     }
     
     vmml::vec3f getCenter() const {
-      return (v[0]+v[1]+v[2])/3;
+      return (vertices[0]+vertices[1]+vertices[2])/3;
     }
 
   private:
-    vmml::vec3f v[3];
-    vmml::vec4f c;
+    vmml::vec3f vertices[3];
+    vmml::vec3f normals[3];
+    vmml::vec2f texcoords[3];
+    vmml::vec4f color;
+    unsigned texture;
 };
 
 }
diff --git a/config.h b/config.h
index 1c2e879..9af944d 100644
--- a/config.h
+++ b/config.h
@@ -20,7 +20,7 @@
 #ifndef ZOOM_CONFIG_H_
 #define ZOOM_CONFIG_H_
 
-#define MIN_FRAME_DELTA 16
+#define MIN_FRAME_DELTA 10
 #define DEFAULT_WIDTH 800
 #define DEFAULT_HEIGHT 600
 
diff --git a/gl.h b/gl.h
index fb5face..22e0523 100644
--- a/gl.h
+++ b/gl.h
@@ -1,5 +1,24 @@
-#ifndef _GL_H_
-#define _GL_H_
+/*
+ * gl.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ZOOM_GL_H_
+#define ZOOM_GL_H_
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
@@ -9,4 +28,4 @@
 #include <GL/gl.h>
 #include <GL/glu.h>
 
-#endif /* _GL_H_ */
+#endif /* ZOOM_GL_H_ */
diff --git a/levels/level.dtd b/levels/level.dtd
new file mode 100644
index 0000000..8ef0604
--- /dev/null
+++ b/levels/level.dtd
@@ -0,0 +1,61 @@
+<!ELEMENT level (info, rooms, gates, textures)>
+
+<!ELEMENT info (name, desc, start)>
+<!ELEMENT rooms (room)*>
+<!ELEMENT gates (gate)*>
+<!ELEMENT textures (texture)*>
+
+<!ELEMENT name (#PCDATA)>
+<!ELEMENT desc (#PCDATA)>
+<!ELEMENT start EMPTY>
+<!ATTLIST start
+  x CDATA #REQUIRED
+  y CDATA #REQUIRED
+  z CDATA #REQUIRED
+>
+
+<!ELEMENT room (triangle)*>
+<!ATTLIST room
+  id ID #REQUIRED
+>
+
+<!ELEMENT gate (triangle)*>
+<!ATTLIST gate
+  room1 IDREF #REQUIRED
+  room2 IDREF #REQUIRED
+>
+
+<!ELEMENT triangle (vertex, normal?, texcoords?, vertex, normal?, texcoords?, vertex, normal?, texcoords?)>
+<!ATTLIST triangle
+  visible (true|false) "true"
+  texture IDREF        #IMPLIED
+>
+
+<!ELEMENT texture EMPTY>
+<!ATTLIST texture
+  id   ID    #REQUIRED
+  name CDATA #REQUIRED
+>
+
+<!ELEMENT vertex EMPTY>
+<!ATTLIST vertex
+  x CDATA #REQUIRED
+  y CDATA #REQUIRED
+  z CDATA #REQUIRED
+>
+
+<!ELEMENT normal EMPTY>
+<!ATTLIST normal
+  x CDATA #REQUIRED
+  y CDATA #REQUIRED
+  z CDATA #REQUIRED
+>
+
+<!ELEMENT texcoords EMPTY>
+<!ATTLIST texcoords
+  s CDATA #REQUIRED
+  t CDATA #IMPLIED
+  r CDATA #IMPLIED
+  q CDATA #IMPLIED
+>
+
diff --git a/levels/level.xml b/levels/level.xml
new file mode 100644
index 0000000..0cbc92f
--- /dev/null
+++ b/levels/level.xml
@@ -0,0 +1,392 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE level PUBLIC "-//libzoom//DTD level 0.1//EN" "level.dtd">
+<level>
+  <info>
+    <name>Test Level</name>
+    <desc>Just a simple test level.</desc>
+    <start x="0.0" y="0.0" z="0.0"/>
+  </info>
+  <rooms>
+    <room id="r0">
+      <triangle texture="t0">
+        <vertex x="-2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="-2.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="-2.0" z="2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="-2.0" z="2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="2.0" y="-2.0" z="2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="-2.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
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+      <triangle texture="t0">
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+      <triangle texture="t0">
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+        <vertex x="2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="2.0"/>
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+        <vertex x="2.0" y="2.0" z="-2.0"/>
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+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t2">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
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+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="6.0" y="-2.0" z="-6.0"/>
+        <texcoords s="1.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t2">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
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+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t2">
+        <vertex x="2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="6.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t2">
+        <vertex x="2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
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+      <triangle texture="t1">
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+        <vertex x="6.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="2.0" y="2.0" z="-6.0"/>
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+        <vertex x="2.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="2.0" z="-6.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-10.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="6.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-10.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-10.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-10.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="2.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="6.0" y="-2.0" z="-6.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-6.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="6.0" y="-2.0" z="-6.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-10.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="-2.0" z="-10.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="6.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="6.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="6.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-6.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="-2.0" z="-6.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+    </room>
+    <room id="r1">
+      <triangle texture="t2">
+        <vertex x="-2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="-2.0" y="-2.0" z="2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="2.0" y="-2.0" z="2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t2">
+        <vertex x="-2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="2.0" y="-2.0" z="2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="-2.0" y="-2.0" z="2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="-2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="-2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="-2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="2.0" y="-2.0" z="2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="-2.0" z="2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="-2.0" y="-2.0" z="2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="-2.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="-2.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="-2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="-2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+      <triangle texture="t1">
+        <vertex x="-2.0" y="2.0" z="2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+    </room>
+  </rooms>
+  <gates>
+    <gate room1="r0" room2="r1">
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="2.0" y="2.0" z="-2.0"/>
+        <texcoords s="1.0" t="0.0"/>
+        <vertex x="6.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+      </triangle>
+      <triangle texture="t0">
+        <vertex x="2.0" y="-2.0" z="-2.0"/>
+        <texcoords s="1.0" t="1.0"/>
+        <vertex x="6.0" y="2.0" z="-2.0"/>
+        <texcoords s="0.0" t="0.0"/>
+        <vertex x="6.0" y="-2.0" z="-2.0"/>
+        <texcoords s="0.0" t="1.0"/>
+      </triangle>
+    </gate>
+  </gates>
+  <textures>
+    <texture id="t0" name="green.png"/>
+    <texture id="t1" name="metallic2.png"/>
+    <texture id="t2" name="light.png"/>
+  </textures>
+</level>
diff --git a/tex/blue.png b/tex/blue.png
new file mode 100644
index 0000000..b730875
--- /dev/null
+++ b/tex/blue.png
diff --git a/tex/cursor.png b/tex/cursor.png
new file mode 100644
index 0000000..4ee35ca
--- /dev/null
+++ b/tex/cursor.png
diff --git a/tex/dark.png b/tex/dark.png
new file mode 100644
index 0000000..f87c09f
--- /dev/null
+++ b/tex/dark.png
diff --git a/tex/door.png b/tex/door.png
new file mode 100644
index 0000000..0706ccd
--- /dev/null
+++ b/tex/door.png
diff --git a/tex/fire.png b/tex/fire.png
new file mode 100644
index 0000000..4371c34
--- /dev/null
+++ b/tex/fire.png
diff --git a/tex/green.png b/tex/green.png
new file mode 100644
index 0000000..cfc6238
--- /dev/null
+++ b/tex/green.png
diff --git a/tex/green2.png b/tex/green2.png
new file mode 100644
index 0000000..87c071b
--- /dev/null
+++ b/tex/green2.png
diff --git a/tex/light.png b/tex/light.png
new file mode 100644
index 0000000..3610a26
--- /dev/null
+++ b/tex/light.png
diff --git a/tex/lightmap.png b/tex/lightmap.png
new file mode 100644
index 0000000..76c3b19
--- /dev/null
+++ b/tex/lightmap.png
diff --git a/tex/lightmap2.png b/tex/lightmap2.png
new file mode 100644
index 0000000..97a151f
--- /dev/null
+++ b/tex/lightmap2.png
diff --git a/tex/medib.png b/tex/medib.png
new file mode 100644
index 0000000..00093b4
--- /dev/null
+++ b/tex/medib.png
diff --git a/tex/metallic.png b/tex/metallic.png
new file mode 100644
index 0000000..d1177b1
--- /dev/null
+++ b/tex/metallic.png
diff --git a/tex/metallic2.png b/tex/metallic2.png
new file mode 100644
index 0000000..4f8977c
--- /dev/null
+++ b/tex/metallic2.png
diff --git a/tex/textur.png b/tex/textur.png
new file mode 100644
index 0000000..96114d3
--- /dev/null
+++ b/tex/textur.png
diff --git a/tex/wall1.png b/tex/wall1.png
new file mode 100644
index 0000000..e620a9b
--- /dev/null
+++ b/tex/wall1.png
diff --git a/tex/wall2.png b/tex/wall2.png
new file mode 100644
index 0000000..2fb39bd
--- /dev/null
+++ b/tex/wall2.png
diff --git a/tex/wall3.png b/tex/wall3.png
new file mode 100644
index 0000000..b30ee2a
--- /dev/null
+++ b/tex/wall3.png
diff --git a/tex/wall4.png b/tex/wall4.png
new file mode 100644
index 0000000..1bec600
--- /dev/null
+++ b/tex/wall4.png
diff --git a/tex/wall5.png b/tex/wall5.png
new file mode 100644
index 0000000..a6c6a73
--- /dev/null
+++ b/tex/wall5.png
diff --git a/zoom.cpp b/zoom.cpp
index 9535b8a..8f01c1b 100644
--- a/zoom.cpp
+++ b/zoom.cpp
@@ -1,3 +1,22 @@
+/*
+ * zoom.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "Game.h"
 #include "config.h"
 #include "gl.h"
@@ -13,9 +32,8 @@
 
 void resize(int width, int height)
 {
-  if(height==0)
-  {
-    height=1;
+  if(height == 0) {
+    height = 1;
   }