266 lines
8.0 KiB
C++
266 lines
8.0 KiB
C++
#ifdef USE_MEM_CHECK
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#include <mcheck.h>
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#endif
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#include <osg/Group>
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#include <osg/Notify>
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#include <osgDB/Registry>
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#include <osgDB/ReadFile>
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#include <osgProducer/Viewer>
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#include <osg/Quat>
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#if defined (WIN32) && !defined(__CYGWIN__)
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#include <winsock.h>
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#endif
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#include "receiver.h"
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#include "broadcaster.h"
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typedef unsigned char * BytePtr;
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template <class T>
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inline void swapBytes( T &s )
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{
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if( sizeof( T ) == 1 ) return;
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T d = s;
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BytePtr sptr = (BytePtr)&s;
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BytePtr dptr = &(((BytePtr)&d)[sizeof(T)-1]);
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for( unsigned int i = 0; i < sizeof(T); i++ )
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*(sptr++) = *(dptr--);
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}
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class CameraPacket {
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public:
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CameraPacket():_masterKilled(false)
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{
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_byte_order = 0x12345678;
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}
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void setPacket(const osg::Matrix& matrix,const osg::FrameStamp* frameStamp)
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{
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_matrix = matrix;
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if (frameStamp)
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{
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_frameStamp = *frameStamp;
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}
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}
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void getModelView(osg::Matrix& matrix,float angle_offset=0.0f)
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{
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matrix = _matrix * osg::Matrix::rotate(osg::DegreesToRadians(angle_offset),0.0f,1.0f,0.0f);
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}
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void checkByteOrder( void )
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{
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if( _byte_order == 0x78563412 ) // We're backwards
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{
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swapBytes( _byte_order );
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swapBytes( _masterKilled );
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for( int i = 0; i < 16; i++ )
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swapBytes( _matrix.ptr()[i] );
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// umm.. we should byte swap _frameStamp too...
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}
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}
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void setMasterKilled(const bool flag) { _masterKilled = flag; }
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const bool getMasterKilled() const { return _masterKilled; }
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unsigned long _byte_order;
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bool _masterKilled;
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osg::Matrix _matrix;
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// note don't use a ref_ptr as used elsewhere for FrameStamp
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// since we don't want to copy the pointer - but the memory.
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// FrameStamp doesn't have a private destructor to allow
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// us to do this, even though its a reference counted object.
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osg::FrameStamp _frameStamp;
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};
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enum ViewerMode
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{
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STAND_ALONE,
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SLAVE,
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MASTER
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};
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int main( int argc, char **argv )
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates how to approach implementation of clustering. Note, cluster support will soon be encompassed in Producer itself.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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arguments.getApplicationUsage()->addCommandLineOption("-m","Set viewer to MASTER mode, sending view via packets.");
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arguments.getApplicationUsage()->addCommandLineOption("-s","Set viewer to SLAVE mode, reciving view via packets.");
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arguments.getApplicationUsage()->addCommandLineOption("-n <int>","Socket number to transmit packets");
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arguments.getApplicationUsage()->addCommandLineOption("-f <float>","Field of view of camera");
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arguments.getApplicationUsage()->addCommandLineOption("-o <float>","Offset angle of camera");
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// construct the viewer.
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osgProducer::Viewer viewer(arguments);
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// set up the value with sensible default event handlers.
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viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
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// get details on keyboard and mouse bindings used by the viewer.
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viewer.getUsage(*arguments.getApplicationUsage());
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// read up the osgcluster specific arguments.
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ViewerMode viewerMode = STAND_ALONE;
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while (arguments.read("-m")) viewerMode = MASTER;
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while (arguments.read("-s")) viewerMode = SLAVE;
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float socketNumber=8100.0f;
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while (arguments.read("-n",socketNumber)) ;
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float camera_fov=45.0f;
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while (arguments.read("-f",camera_fov))
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{
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std::cout << "setting lens perspective : original "<<viewer.getLensHorizontalFov()<<" "<<viewer.getLensVerticalFov()<<std::endl;
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viewer.setLensPerspective(camera_fov,camera_fov*viewer.getLensVerticalFov()/viewer.getLensHorizontalFov(),1.0f,1000.0f);
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std::cout << "setting lens perspective : new "<<viewer.getLensHorizontalFov()<<" "<<viewer.getLensVerticalFov()<<std::endl;
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}
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float camera_offset=45.0f;
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while (arguments.read("-o",camera_offset)) ;
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// if user request help write it out to cout.
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if (arguments.read("-h") || arguments.read("--help"))
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{
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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if (arguments.argc()<=1)
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{
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arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
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return 1;
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}
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// load model.
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osg::ref_ptr<osg::Node> rootnode = osgDB::readNodeFiles(arguments);
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// set the scene to render
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viewer.setSceneData(rootnode.get());
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// create the windows and run the threads.
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viewer.realize();
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// objects for managing the broadcasting and recieving of camera packets.
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Broadcaster bc;
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Receiver rc;
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bc.setPort(static_cast<short int>(socketNumber));
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rc.setPort(static_cast<short int>(socketNumber));
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bool masterKilled = false;
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while( !viewer.done() && !masterKilled )
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{
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// wait for all cull and draw threads to complete.
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viewer.sync();
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// update the scene by traversing it with the the update visitor which will
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// call all node update callbacks and animations.
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viewer.update();
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// special handling for working as a cluster.
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switch (viewerMode)
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{
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case(MASTER):
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{
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CameraPacket cp;
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// take camera zero as the guide.
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osg::Matrix modelview(viewer.getCameraConfig()->getCamera(0)->getViewMatrix());
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cp.setPacket(modelview,viewer.getFrameStamp());
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bc.setBuffer(&cp, sizeof( CameraPacket ));
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bc.sync();
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}
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break;
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case(SLAVE):
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{
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CameraPacket cp;
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rc.setBuffer(&cp, sizeof( CameraPacket ));
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rc.sync();
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cp.checkByteOrder();
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osg::Matrix modelview;
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cp.getModelView(modelview,camera_offset);
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viewer.setView(modelview);
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if (cp.getMasterKilled())
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{
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std::cout << "received master killed"<<std::endl;
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// break out of while (!done) loop since we've now want to shut down.
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masterKilled = true;
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}
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}
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break;
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default:
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// no need to anything here, just a normal interactive viewer.
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break;
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}
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// fire off the cull and draw traversals of the scene.
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if(!masterKilled)
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viewer.frame();
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}
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// wait for all cull and draw threads to complete before exit.
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viewer.sync();
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// if we are master clean up by telling all slaves that we're going down.
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if (viewerMode==MASTER)
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{
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// need to broadcast my death.
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CameraPacket cp;
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cp.setPacket(osg::Matrix::identity(),viewer.getFrameStamp());
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cp.setMasterKilled(true);
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bc.setBuffer(&cp, sizeof( CameraPacket ));
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bc.sync();
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std::cout << "broadcasting death"<<std::endl;
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}
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return 0;
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}
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