Added osgdepthpeeling example

examples/osgdepthpeeling/DePeePass.cpp

@@ -0,0 +1,49 @@
+/*
+  Steffen Frey
+  Fachpraktikum Graphik-Programmierung 2007
+  Institut fuer Visualisierung und Interaktive Systeme
+  Universitaet Stuttgart
+ */
+
+#include "DePeePass.h"
+
+#include <iostream>
+#include <assert.h>
+
+DePeePass::DePeePass()
+{
+  root = new osg::Group;
+}
+
+DePeePass::~DePeePass()
+{
+  root->releaseGLObjects();
+  assert(Cameras.size() == settingNodes.size());
+  while(!Cameras.empty())
+    {
+      remRenderPass((*Cameras.begin()).first);
+    }
+}
+  
+void DePeePass::newRenderPass(MapMode mapMode)
+{
+  Cameras[mapMode] = new osg::Camera;
+  settingNodes[mapMode] = new osg::Group;
+  root->addChild(Cameras[mapMode].get());
+  Cameras[mapMode]->addChild(settingNodes[mapMode].get());
+}
+  
+void DePeePass::remRenderPass(MapMode mapMode)
+{
+  assert(Cameras.find(mapMode) != Cameras.end());
+  Cameras[mapMode]->releaseGLObjects();
+  settingNodes[mapMode]->releaseGLObjects();
+  
+  Cameras[mapMode]->removeChild(settingNodes[mapMode].get());
+  //setting Nodes have exactly one child
+  assert(settingNodes[mapMode]->getNumChildren() == 1);
+  settingNodes[mapMode]->removeChild(0,1);
+  
+  Cameras.erase(Cameras.find(mapMode));
+  settingNodes.erase(settingNodes.find(mapMode));
+}