Fix vlj's profiler code, only worked in single player

src/graphics/camera.cpp

@@ -45,6 +45,8 @@
 AlignedArray<Camera::EndCameraInformation> Camera::m_end_cameras;
 std::vector<Camera*>                       Camera::m_all_cameras;
 
+Camera* Camera::s_active_camera = NULL;
+
 // ============================================================================
 Camera::Camera(int camera_index, AbstractKart* kart) : m_kart(NULL)
 {
@@ -667,6 +669,7 @@ void Camera::handleEndCamera(float dt)
  */
 void Camera::activate()
 {
+    s_active_camera = this;
     irr::scene::ISceneManager *sm = irr_driver->getSceneManager();
     sm->setActiveCamera(m_camera);
     irr_driver->getVideoDriver()->setViewPort(m_viewport);

src/graphics/camera.hpp

@@ -61,6 +61,8 @@ public:
     };
 
 private:
+    static Camera* s_active_camera;
+
     /** The camera scene node. */
     scene::ICameraSceneNode *m_camera;
 
@@ -271,6 +273,9 @@ public:
     // ------------------------------------------------------------------------
     /** Returns the camera scene node. */
     scene::ICameraSceneNode *getCameraSceneNode() { return m_camera; }
+
+    // ------------------------------------------------------------------------
+    static Camera* getActiveCamera() { return s_active_camera; }
 } ;
 
 #endif

src/graphics/lod_node.cpp

@@ -72,9 +72,12 @@ int LODNode::getLevel()
     if(m_forced_lod>-1)
         return m_forced_lod;
 
-    // TODO: optimize this, there is no need to check every frame
     scene::ICameraSceneNode* curr_cam = irr_driver->getSceneManager()->getActiveCamera();
-    const Vec3 &pos = Camera::getCamera(0)->getKart()->getFrontXYZ();
+    Camera* camera = Camera::getActiveCamera();
+    if (camera == NULL)
+        return m_detail.size() - 1;
+    AbstractKart* kart = camera->getKart();
+    const Vec3 &pos = kart->getFrontXYZ();
 
     // Assumes all children are at the same location
     const int dist =