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Moved the osgcameragroup example across to being just based on

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osgProducer::OsgCameraGroup with no usage of osgGA manipulators.

Removed redundent files from osgProducer.
This commit is contained in:
Robert Osfield
2003-04-10 15:23:49 +00:00
parent 8b03d59be3
commit 52d2d8eaff
8 changed files with 104 additions and 436 deletions
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239
examples/osgcameragroup/osgcameragroup.cpp
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@@ -12,6 +12,7 @@
#include <Producer/CameraConfig>
#include <Producer/InputArea>
#include <Producer/KeyboardMouse>
#include <Producer/Trackball>
#include <osg/Timer>
@@ -20,187 +21,155 @@
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchCameraManipulator>
#include <osgGA/StateSetManipulator>
#include <osgProducer/OsgCameraGroup>
#include <osgProducer/OsgSceneHandler>
#include <osgProducer/KeyboardMouseCallback>
#include <osgProducer/ActionAdapter>
#include <list>
class MyKeyboardMouseCallback : public Producer::KeyboardMouseCallback
{
public:
MyKeyboardMouseCallback() :
Producer::KeyboardMouseCallback(),
_mx(0.0f),_my(0.0f),_mbutton(0),
_done(false)
{}
virtual void specialKeyPress( Producer::KeyCharacter key )
{
if (key==Producer::KeyChar_Escape)
shutdown();
}
virtual void shutdown()
{
_done = true;
}
virtual void keyPress( Producer::KeyCharacter )
{
}
virtual void mouseMotion( float mx, float my )
{
_mx = mx;
_my = my;
}
virtual void buttonPress( float mx, float my, unsigned int mbutton )
{
_mx = mx;
_my = my;
_mbutton |= (1<<(mbutton-1));
}
virtual void buttonRelease( float mx, float my, unsigned int mbutton )
{
_mx = mx;
_my = my;
_mbutton &= ~(1<<(mbutton-1));
}
bool done() { return _done; }
float mx() { return _mx; }
float my() { return _my; }
unsigned int mbutton() { return _mbutton; }
private:
float _mx, _my;
unsigned int _mbutton;
bool _done;
};
int main( int argc, char **argv )
{
// threading model.
Producer::CameraGroup::ThreadingModel threadingModel = Producer::CameraGroup::SingleThreaded;
threadingModel = Producer::CameraGroup::ThreadPerCamera;
// configuration file.
std::string configFile;
//configFile = "twoWindows.cfg";
// set up the database files to read.
std::vector<std::string> filenameList;
if (argc>1) filenameList.push_back(argv[1]);
else filenameList.push_back("cow.osg");
// 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] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
// create the camera group.
osgProducer::OsgCameraGroup *cg = configFile.empty() ?
(new osgProducer::OsgCameraGroup()):
(new osgProducer::OsgCameraGroup(configFile));
osgProducer::OsgCameraGroup cg(arguments);
// set up the maximum number of graphics contexts, before loading the scene graph
// to ensure that texture objects and display buffers are configured to the correct size.
osg::DisplaySettings::instance()->setMaxNumberOfGraphicsContexts( cg->getNumberOfCameras() );
// 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;
}
if (arguments.argc()<=1)
{
arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
return 1;
}
// read the scene.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(filenameList);
if (!loadedModel) return 1;
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
if (!loadedModel)
{
std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
return 1;
}
osgUtil::Optimizer optimizer;
optimizer.optimize(loadedModel.get());
// set up the keyboard and mouse handling.
Producer::InputArea *ia = cg->getCameraConfig()->getInputArea();
Producer::InputArea *ia = cg.getCameraConfig()->getInputArea();
Producer::KeyboardMouse *kbm = ia ?
(new Producer::KeyboardMouse(ia)) :
(new Producer::KeyboardMouse(cg->getCamera(0)->getRenderSurface()));
(new Producer::KeyboardMouse(cg.getCamera(0)->getRenderSurface()));
// set up the time and frame counter.
unsigned int frameNumber = 0;
osg::Timer timer;
osg::Timer_t start_tick = timer.tick();
// set the keyboard mouse callback to catch the events from the windows.
bool done = false;
osgProducer::KeyboardMouseCallback kbmcb(kbm,done);
kbmcb.setStartTick(start_tick);
MyKeyboardMouseCallback kbmcb;
// register the callback with the keyboard mouse manger.
kbm->setCallback( &kbmcb );
//kbm->allowContinuousMouseMotionUpdate(true);
kbm->startThread();
// set the globa state
osg::ref_ptr<osg::StateSet> globalStateSet = new osg::StateSet;
globalStateSet->setGlobalDefaults();
cg->setGlobalStateSet(globalStateSet.get());
// add either a headlight or sun light to the scene.
osg::LightSource* lightsource = new osg::LightSource;
osg::Light* light = new osg::Light;
lightsource->setLight(light);
lightsource->setReferenceFrame(osg::LightSource::RELATIVE_TO_ABSOLUTE); // headlight.
lightsource->setLocalStateSetModes(osg::StateAttribute::ON);
lightsource->addChild(loadedModel.get());
// set the scene to render
// cg->setSceneData(scene.get());
cg->setSceneData(lightsource);
cg.setSceneData(loadedModel.get());
// set up the pthread stack size to large enough to run into problems.
cg->setStackSize( 20*1024*1024);
Producer::Trackball tb;
tb.setOrientation( Producer::Trackball::Y_UP );
// create the windows and run the threads.
cg->realize(threadingModel);
osg::ref_ptr<osg::FrameStamp> frameStamp = cg->getFrameStamp();
cg.realize();
osgUtil::UpdateVisitor update;
update.setFrameStamp(frameStamp.get());
// create a camera to use with the manipulators.
osg::ref_ptr<osg::Camera> old_style_osg_camera = new osg::Camera;
osg::ref_ptr<osgGA::KeySwitchCameraManipulator> keyswitchManipulator = new osgGA::KeySwitchCameraManipulator;
keyswitchManipulator->addNumberedCameraManipulator(new osgGA::TrackballManipulator);
keyswitchManipulator->addNumberedCameraManipulator(new osgGA::FlightManipulator);
keyswitchManipulator->addNumberedCameraManipulator(new osgGA::DriveManipulator);
keyswitchManipulator->setCamera(old_style_osg_camera.get());
keyswitchManipulator->setNode(loadedModel.get());
osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
statesetManipulator->setStateSet(globalStateSet.get());
// create an event handler list, we'll dispatch our event to these..
typedef std::list< osg::ref_ptr<osgGA::GUIEventHandler> > EventHandlerList;
EventHandlerList eventHandlerList;
eventHandlerList.push_back(keyswitchManipulator.get());
eventHandlerList.push_back(statesetManipulator.get());
// create a dummy action adapter right now.
osgProducer::ActionAdapter actionAdapter;
osg::ref_ptr<osgProducer::EventAdapter> init_event = new osgProducer::EventAdapter;
init_event->adaptFrame(0.0);
keyswitchManipulator->getCurrentCameraManipulator()->home(*init_event,actionAdapter);
while( !done )
while( !kbmcb.done() )
{
// syncronize to screen refresh.
cg->sync();
// set the frame stamp for the new frame.
double time_since_start = timer.delta_s(start_tick,timer.tick());
frameStamp->setFrameNumber(frameNumber);
frameStamp->setReferenceTime(time_since_start);
// get the event since the last frame.
osgProducer::KeyboardMouseCallback::EventQueue queue;
kbmcb.getEventQueue(queue);
// create an event to signal the new frame.
osg::ref_ptr<osgProducer::EventAdapter> frame_event = new osgProducer::EventAdapter;
frame_event->adaptFrame(frameStamp->getReferenceTime());
queue.push_back(frame_event);
// dispatch the events in order of arrival.
for(osgProducer::KeyboardMouseCallback::EventQueue::iterator event_itr=queue.begin();
event_itr!=queue.end();
++event_itr)
{
bool handled = false;
for(EventHandlerList::iterator handler_itr=eventHandlerList.begin();
handler_itr!=eventHandlerList.end() && !handled;
++handler_itr)
{
handled = (*handler_itr)->handle(*(*event_itr),actionAdapter);
}
}
cg.sync();
// update the scene by traversing it with the the update visitor which will
// call all node update callbacks and animations.
cg->getSceneData()->accept(update);
cg.getSceneData()->accept(update);
tb.input( kbmcb.mx(), kbmcb.my(), kbmcb.mbutton() );
// update the main producer camera
cg->setView(old_style_osg_camera->getModelViewMatrix());
cg.setViewByMatrix(tb.getMatrix());
// fire off the cull and draw traversals of the scene.
cg->frame();
// increment the frame number ready for the next frame
++frameNumber;
cg.frame();
}
return 0;
}