150 lines
4.6 KiB
C++
150 lines
4.6 KiB
C++
//C++ source file - Open Producer - Copyright (C) 2002 Don Burns
|
|
//Distributed under the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE (LGPL)
|
|
//as published by the Free Software Foundation.
|
|
|
|
// Simple example of use of Producer::RenderSurface
|
|
// The myGraphics class is a simple sample of how one would implement
|
|
// graphics drawing with Producer::RenderSurface
|
|
|
|
#include <osgUtil/UpdateVisitor>
|
|
|
|
#include <osgDB/ReadFile>
|
|
|
|
#include <osg/ShapeDrawable>
|
|
#include <osg/PositionAttitudeTransform>
|
|
|
|
#include <osgProducer/Viewer>
|
|
|
|
#include "DepthPartitionNode.h"
|
|
|
|
const double r_earth = 6378.137;
|
|
const double r_sun = 695990.0;
|
|
const double AU = 149697900.0;
|
|
|
|
osg::Node* createScene()
|
|
{
|
|
// Create the Earth, in blue
|
|
osg::ShapeDrawable *earth_sd = new osg::ShapeDrawable;
|
|
osg::Sphere* earth_sphere = new osg::Sphere;
|
|
earth_sphere->setRadius(r_earth);
|
|
earth_sd->setShape(earth_sphere);
|
|
earth_sd->setColor(osg::Vec4(0, 0, 1.0, 1.0));
|
|
|
|
osg::Geode* earth = new osg::Geode;
|
|
earth->setName("earth");
|
|
earth->addDrawable(earth_sd);
|
|
|
|
// Create the Sun, in yellow
|
|
osg::ShapeDrawable *sun_sd = new osg::ShapeDrawable;
|
|
osg::Sphere* sun_sphere = new osg::Sphere;
|
|
sun_sphere->setRadius(r_sun);
|
|
sun_sd->setShape(sun_sphere);
|
|
sun_sd->setColor(osg::Vec4(1.0, 0.0, 0.0, 1.0));
|
|
|
|
osg::Geode* sun = new osg::Geode;
|
|
sun->setName("sun");
|
|
sun->addDrawable(sun_sd);
|
|
|
|
// Move the sun behind the earth
|
|
osg::PositionAttitudeTransform *pat = new osg::PositionAttitudeTransform;
|
|
pat->setPosition(osg::Vec3d(0.0, AU, 0.0));
|
|
|
|
osg::Group* scene = new osg::Group;
|
|
scene->addChild(earth);
|
|
scene->addChild(pat);
|
|
pat->addChild(sun);
|
|
|
|
return scene;
|
|
}
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
|
|
// use an ArgumentParser object to manage the program arguments.
|
|
osg::ArgumentParser arguments(&argc,argv);
|
|
|
|
// set up the usage document, in case we need to print out how to use this program.
|
|
arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
|
|
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard example of using osgProducer::CameraGroup.");
|
|
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] ...");
|
|
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
|
|
|
|
// construct the viewer.
|
|
osgProducer::Viewer viewer(arguments);
|
|
|
|
// set up the value with sensible default event handlers.
|
|
viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
|
|
|
|
// if user request help write it out to cout.
|
|
if (arguments.read("-h") || arguments.read("--help"))
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
// any option left unread are converted into errors to write out later.
|
|
arguments.reportRemainingOptionsAsUnrecognized();
|
|
|
|
// report any errors if they have occured when parsing the program aguments.
|
|
if (arguments.errors())
|
|
{
|
|
arguments.writeErrorMessages(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
|
|
bool needToSetHomePosition = false;
|
|
|
|
// read the scene from the list of file specified commandline args.
|
|
osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
|
|
|
|
// if one hasn't been loaded create an earth and sun test model.
|
|
if (!scene)
|
|
{
|
|
scene = createScene();
|
|
needToSetHomePosition = true;
|
|
}
|
|
|
|
// Create a DepthPartitionNode to manage partitioning of the scene
|
|
osg::ref_ptr<DepthPartitionNode> dpn = new DepthPartitionNode;
|
|
dpn->addChild(scene.get());
|
|
dpn->setActive(true); // Control whether the node analyzes the scene
|
|
|
|
// pass the loaded scene graph to the viewer.
|
|
viewer.setSceneData(dpn.get());
|
|
|
|
if (needToSetHomePosition)
|
|
{
|
|
viewer.getKeySwitchMatrixManipulator()->setHomePosition(osg::Vec3d(0.0,-5.0*r_earth,0.0),osg::Vec3d(0.0,0.0,0.0),osg::Vec3d(0.0,0.0,1.0));
|
|
}
|
|
|
|
// create the windows and run the threads.
|
|
viewer.realize();
|
|
|
|
while( !viewer.done() )
|
|
{
|
|
// wait for all cull and draw threads to complete.
|
|
viewer.sync();
|
|
|
|
// update the scene by traversing it with the the update visitor which will
|
|
// call all node update callbacks and animations.
|
|
viewer.update();
|
|
|
|
// fire off the cull and draw traversals of the scene.
|
|
viewer.frame();
|
|
|
|
}
|
|
|
|
// wait for all cull and draw threads to complete before exit.
|
|
viewer.sync();
|
|
|
|
// run a clean up frame to delete all OpenGL objects.
|
|
viewer.cleanup_frame();
|
|
|
|
// wait for all the clean up frame to complete.
|
|
viewer.sync();
|
|
|
|
return 0;
|
|
}
|
|
|