Fixed various memory leaks.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@3857 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/camera.cpp

@@ -56,7 +56,8 @@ Camera::Camera(int camera_index, const Kart* kart)
 // ----------------------------------------------------------------------------
 Camera::~Camera()
 {
-    reset();
+    irr_driver->removeCamera(m_camera);
+    m_camera=NULL;
 }
 
 // ----------------------------------------------------------------------------

src/graphics/irr_driver.cpp

@@ -522,6 +522,20 @@ scene::ICameraSceneNode *IrrDriver::addCamera()
      return m_scene_manager->addCameraSceneNode();
  }   // addCamera
 
+// ----------------------------------------------------------------------------
+/** Removes a camera. This can't be done with removeNode() since the camera
+ *  can be marked as active, meaning a drop will not delete it. While this
+ *  doesn't really cause a memory leak (the camera is removed the next time
+ *  a camera is added), it's a bit cleaner and easier to check for memory
+ *  leaks, since the scene root should now always be empty.
+ */
+void IrrDriver::removeCamera(scene::ICameraSceneNode *camera)
+{
+    if(camera==m_scene_manager->getActiveCamera())
+        m_scene_manager->setActiveCamera(NULL);    // basically causes a drop
+    camera->remove();
+}   // removeCamera
+
 // ----------------------------------------------------------------------------
 /** Loads a texture from a file and returns the texture object.
  *  \param filename File name of the texture to load.

src/graphics/irr_driver.hpp

@@ -104,6 +104,7 @@ public:
                          *addAnimatedMesh(scene::IAnimatedMesh *mesh);
     scene::ICameraSceneNode 
                          *addCamera();
+    void                  removeCamera(scene::ICameraSceneNode *camera);
     void                  update(float dt);
     
     void                  changeResolution();

src/tracks/quad_graph.cpp

@@ -448,6 +448,7 @@ video::ITexture *QuadGraph::makeMiniMap(const core::dimension2di &dimension,
     camera->setTarget(core::vector3df(center.getX(),0,center.getY()));
     video::ITexture *texture=irr_driver->endRenderToTexture();
     cleanupDebugMesh();
+    irr_driver->removeCamera(camera);
     m_min_coord = bb_min;
     m_scaling.setX(dimension.Width/(bb_max.getX()-bb_min.getX()));
     m_scaling.setY(dimension.Width/(bb_max.getY()-bb_min.getY()));