added a new modern example of how to use cmake

examples/osgCMakeExampleModern/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 2.8.8)
+
+SET(PROJECT_NAME osgCMakeExampleModern)
+
+PROJECT(${PROJECT_NAME})
+
+FIND_PACKAGE (OpenSceneGraph REQUIRED COMPONENTS osgUtil osgDB osgText osgGA osgFX osgSim osgViewer CONFIG)
+
+SET(SOURCES
+    main.cpp
+)
+
+
+ADD_EXECUTABLE(${PROJECT_NAME} ${SOURCES})
+
+TARGET_LINK_LIBRARIES(${PROJECT_NAME} osg3::osg osg3::osgUtil osg3::osgDB osg3::osgText osg3::osgGA osg3::osgFX osg3::osgSim osg3::osgViewer)

examples/osgCMakeExampleModern/main.cpp

@@ -0,0 +1,183 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 Robert Osfield
+ *
+ * This application is open source and may be redistributed and/or modified
+ * freely and without restriction, both in commercial and non commercial applications,
+ * as long as this copyright notice is maintained.
+ *
+ * This application 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.
+*/
+
+#include <osgDB/ReadFile>
+#include <osgUtil/Optimizer>
+#include <osg/CoordinateSystemNode>
+
+#include <osg/Switch>
+#include <osg/Types>
+#include <osgText/Text>
+
+#include <osgViewer/Viewer>
+#include <osgViewer/ViewerEventHandlers>
+
+#include <osgGA/TrackballManipulator>
+#include <osgGA/FlightManipulator>
+#include <osgGA/DriveManipulator>
+#include <osgGA/KeySwitchMatrixManipulator>
+#include <osgGA/StateSetManipulator>
+#include <osgGA/AnimationPathManipulator>
+#include <osgGA/TerrainManipulator>
+#include <osgGA/SphericalManipulator>
+
+#include <osgGA/Device>
+
+#include <iostream>
+
+
+int main(int argc, char** argv)
+{
+    // use an ArgumentParser object to manage the program arguments.
+    osg::ArgumentParser arguments(&argc,argv);
+
+    arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
+    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard OpenSceneGraph example which loads and visualises 3d models.");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
+    arguments.getApplicationUsage()->addCommandLineOption("--image <filename>","Load an image and render it on a quad");
+    arguments.getApplicationUsage()->addCommandLineOption("--dem <filename>","Load an image/DEM and render it on a HeightField");
+    arguments.getApplicationUsage()->addCommandLineOption("--login <url> <username> <password>","Provide authentication information for http file access.");
+    arguments.getApplicationUsage()->addCommandLineOption("-p <filename>","Play specified camera path animation file, previously saved with 'z' key.");
+    arguments.getApplicationUsage()->addCommandLineOption("--speed <factor>","Speed factor for animation playing (1 == normal speed).");
+    arguments.getApplicationUsage()->addCommandLineOption("--device <device-name>","add named device to the viewer");
+
+    osgViewer::Viewer viewer(arguments);
+
+    unsigned int helpType = 0;
+    if ((helpType = arguments.readHelpType()))
+    {
+        arguments.getApplicationUsage()->write(std::cout, helpType);
+        return 1;
+    }
+
+    // report any errors if they have occurred when parsing the program arguments.
+    if (arguments.errors())
+    {
+        arguments.writeErrorMessages(std::cout);
+        return 1;
+    }
+
+    if (arguments.argc()<=1)
+    {
+        arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
+        return 1;
+    }
+
+    std::string url, username, password;
+    while(arguments.read("--login",url, username, password))
+    {
+        if (!osgDB::Registry::instance()->getAuthenticationMap())
+        {
+            osgDB::Registry::instance()->setAuthenticationMap(new osgDB::AuthenticationMap);
+            osgDB::Registry::instance()->getAuthenticationMap()->addAuthenticationDetails(
+                url,
+                new osgDB::AuthenticationDetails(username, password)
+            );
+        }
+    }
+
+    std::string device;
+    while(arguments.read("--device", device))
+    {
+        osg::ref_ptr<osgGA::Device> dev = osgDB::readRefFile<osgGA::Device>(device);
+        if (dev.valid())
+        {
+            viewer.addDevice(dev);
+        }
+    }
+
+    // set up the camera manipulators.
+    {
+        osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
+
+        keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new osgGA::TrackballManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '2', "Flight", new osgGA::FlightManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '3', "Drive", new osgGA::DriveManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new osgGA::TerrainManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '5', "Orbit", new osgGA::OrbitManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '6', "FirstPerson", new osgGA::FirstPersonManipulator() );
+        keyswitchManipulator->addMatrixManipulator( '7', "Spherical", new osgGA::SphericalManipulator() );
+
+        std::string pathfile;
+        double animationSpeed = 1.0;
+        while(arguments.read("--speed",animationSpeed) ) {}
+        char keyForAnimationPath = '8';
+        while (arguments.read("-p",pathfile))
+        {
+            osgGA::AnimationPathManipulator* apm = new osgGA::AnimationPathManipulator(pathfile);
+            if (apm || !apm->valid())
+            {
+                apm->setTimeScale(animationSpeed);
+
+                unsigned int num = keyswitchManipulator->getNumMatrixManipulators();
+                keyswitchManipulator->addMatrixManipulator( keyForAnimationPath, "Path", apm );
+                keyswitchManipulator->selectMatrixManipulator(num);
+                ++keyForAnimationPath;
+            }
+        }
+
+        viewer.setCameraManipulator( keyswitchManipulator.get() );
+    }
+
+    // add the state manipulator
+    viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
+
+    // add the thread model handler
+    viewer.addEventHandler(new osgViewer::ThreadingHandler);
+
+    // add the window size toggle handler
+    viewer.addEventHandler(new osgViewer::WindowSizeHandler);
+
+    // add the stats handler
+    viewer.addEventHandler(new osgViewer::StatsHandler);
+
+    // add the help handler
+    viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
+
+    // add the record camera path handler
+    viewer.addEventHandler(new osgViewer::RecordCameraPathHandler);
+
+    // add the LOD Scale handler
+    viewer.addEventHandler(new osgViewer::LODScaleHandler);
+
+    // add the screen capture handler
+    viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);
+
+    // load the data
+    osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
+    if (!loadedModel)
+    {
+        std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
+        return 1;
+    }
+
+    // any option left unread are converted into errors to write out later.
+    arguments.reportRemainingOptionsAsUnrecognized();
+
+    // report any errors if they have occurred when parsing the program arguments.
+    if (arguments.errors())
+    {
+        arguments.writeErrorMessages(std::cout);
+        return 1;
+    }
+
+
+    // optimize the scene graph, remove redundant nodes and state etc.
+    osgUtil::Optimizer optimizer;
+    optimizer.optimize(loadedModel);
+
+    viewer.setSceneData(loadedModel);
+
+    viewer.realize();
+
+    return viewer.run();
+
+}