From 2014e852595bab8fdbfbcd2b9ca47487fee5c6ee Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 21 Oct 2010 16:28:23 +0000
Subject: [PATCH] Added new osganalysis example as a testbed for profiling
 peformance of various aspects of OSG/OpenGL and scene graphs.

---
 examples/CMakeLists.txt              |   1 +
 examples/osganalysis/CMakeLists.txt  |   4 +
 examples/osganalysis/osganalysis.cpp | 132 +++++++++++++++++++++++++++
 3 files changed, 137 insertions(+)
 create mode 100644 examples/osganalysis/CMakeLists.txt
 create mode 100644 examples/osganalysis/osganalysis.cpp

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 766534c4e..493c47f9c 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -18,6 +18,7 @@ SET(TARGET_COMMON_LIBRARIES
 IF(DYNAMIC_OPENSCENEGRAPH)
 
     ADD_SUBDIRECTORY(osg2cpp)
+    ADD_SUBDIRECTORY(osganalysis)
     ADD_SUBDIRECTORY(osganimate)
     ADD_SUBDIRECTORY(osgautocapture)
     ADD_SUBDIRECTORY(osgautotransform)
diff --git a/examples/osganalysis/CMakeLists.txt b/examples/osganalysis/CMakeLists.txt
new file mode 100644
index 000000000..085dff1cf
--- /dev/null
+++ b/examples/osganalysis/CMakeLists.txt
@@ -0,0 +1,4 @@
+SET(TARGET_SRC osganalysis.cpp)
+
+#### end var setup  ###
+SETUP_EXAMPLE(osganalysis)
diff --git a/examples/osganalysis/osganalysis.cpp b/examples/osganalysis/osganalysis.cpp
new file mode 100644
index 000000000..785e590b7
--- /dev/null
+++ b/examples/osganalysis/osganalysis.cpp
@@ -0,0 +1,132 @@
+/* OpenSceneGraph example, osgterrain.
+*
+*  Permission is hereby granted, free of charge, to any person obtaining a copy
+*  of this software and associated documentation files (the "Software"), to deal
+*  in the Software without restriction, including without limitation the rights
+*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+*  copies of the Software, and to permit persons to whom the Software is
+*  furnished to do so, subject to the following conditions:
+*
+*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+*  THE SOFTWARE.
+*/
+
+
+#include <osgViewer/Viewer>
+#include <osgViewer/ViewerEventHandlers>
+#include <osgDB/ReadFile>
+#include <osgGA/TrackballManipulator>
+#include <osgUtil/IncrementalCompileOperation>
+
+
+struct CustomCompileCompletedCallback : public osgUtil::IncrementalCompileOperation::CompileCompletedCallback
+{
+    CustomCompileCompletedCallback():
+        completed(false) {}
+
+    virtual bool compileCompleted(osgUtil::IncrementalCompileOperation::CompileSet* compileSet)
+    {
+        OSG_NOTICE<<"compileCompleted"<<std::endl;
+        completed = true;
+        return true;
+    }
+
+    bool completed;
+};
+
+int main(int argc, char** argv)
+{
+    osg::ArgumentParser arguments(&argc, argv);
+
+    // construct the viewer.
+    osgViewer::Viewer viewer(arguments);
+
+    viewer.setCameraManipulator(new osgGA::TrackballManipulator());
+    viewer.addEventHandler(new osgViewer::StatsHandler());
+    viewer.addEventHandler(new osgViewer::WindowSizeHandler);
+
+    osg::ref_ptr<osgUtil::IncrementalCompileOperation> incrementalCompile = new osgUtil::IncrementalCompileOperation;
+    viewer.setIncrementalCompileOperation(incrementalCompile.get());
+
+    double timeBetweenMerges = 2.0;
+    while(arguments.read("--interval",timeBetweenMerges)) {}
+
+    typedef std::vector< osg::ref_ptr<osg::Node> > Models;
+    Models models;
+
+    for(int pos=1;pos<arguments.argc();++pos)
+    {
+        if (!arguments.isOption(pos))
+        {
+            // not an option so assume string is a filename.
+            osg::Node *node = osgDB::readNodeFile( arguments[pos]);
+            if(node)
+            {
+                if (node->getName().empty()) node->setName( arguments[pos] );
+                models.push_back(node);
+            }
+        }
+    }
+
+    OSG_NOTICE<<"models.size()="<<models.size()<<std::endl;
+
+    osg::ref_ptr<osg::Group> group = new osg::Group;
+
+    unsigned int modelIndex = 0;
+
+    group->addChild(models[modelIndex++].get());
+
+    viewer.setSceneData(group);
+
+    viewer.realize();
+
+    double timeOfLastMerge = viewer.getFrameStamp()->getReferenceTime();
+
+    osg::ref_ptr<CustomCompileCompletedCallback> compileCompletedCallback;
+
+    while(!viewer.done())
+    {
+        viewer.frame();
+
+        double currentTime = viewer.getFrameStamp()->getReferenceTime();
+
+        if (!compileCompletedCallback &&
+            modelIndex<models.size() &&
+            (currentTime-timeOfLastMerge)>timeBetweenMerges)
+        {
+            OSG_NOTICE<<"Compiling model "<<modelIndex<<" at "<<currentTime<<std::endl;
+
+            osg::ref_ptr<osgUtil::IncrementalCompileOperation::CompileSet> compileSet =
+                new osgUtil::IncrementalCompileOperation::CompileSet(models[modelIndex].get());
+
+            compileCompletedCallback = new CustomCompileCompletedCallback;
+
+            compileSet->_compileCompletedCallback = compileCompletedCallback;
+
+            incrementalCompile->add(compileSet.get());
+        }
+
+        if (compileCompletedCallback.valid() && compileCompletedCallback->completed)
+        {
+            OSG_NOTICE<<"Merging model "<<modelIndex<<" at "<<currentTime<<std::endl;
+
+            timeOfLastMerge = currentTime;
+
+            compileCompletedCallback = 0;
+
+            group->removeChildren(0,group->getNumChildren());
+
+            group->addChild(models[modelIndex++].get());
+
+            viewer.home();
+        }
+
+    }
+
+    return 0;
+}