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Added Geoff Michel's new osggeomdemo program which allows control of

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geo models via the mouse.
This commit is contained in:
Robert Osfield
2002-11-07 13:56:12 +00:00
parent c84cdf159c
commit 71bea99ba2
7 changed files with 375 additions and 0 deletions
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16
src/Demos/osggeodemo/Makefile Normal file
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TOPDIR = ../../..
include $(TOPDIR)/Make/makedefs
CXXFILES =\
osggeodemo.cpp\
LIBS += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
INSTFILES = \
$(CXXFILES)\
Makefile.inst=Makefile
EXEC = osggeodemo
include $(TOPDIR)/Make/makerules

12
src/Demos/osggeodemo/Makefile.inst Normal file
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TOPDIR = ../..
include $(TOPDIR)/Make/makedefs
CXXFILES =\
osggeomdemo.cpp\
LIBS += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
EXEC = osggeomdemo
include $(TOPDIR)/Make/makerules

220
src/Demos/osggeodemo/osggeodemo.cpp Normal file
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// Geo demo written by Geoff Michel, November 2002.
#include <stdio.h>
#include <osg/GL>
#include <osgGLUT/glut>
#include <osgGLUT/Viewer>
#include <osg/Node>
#include <osg/Notify>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgUtil/Optimizer>
// currently not a satisfactory solution, but this is early days for the
// geo loader and having direct links with it.
#include "../../osgPlugins/geo/osgGeoAnimation.h"
void write_usage(std::ostream& out,const std::string& name)
{
out << std::endl;
out <<"usage:"<< std::endl;
out <<" "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
out << std::endl;
out <<"options:"<< std::endl;
out <<" -l libraryName - load plugin of name libraryName"<< std::endl;
out <<" i.e. -l osgdb_pfb"<< std::endl;
out <<" Useful for loading reader/writers which can load"<< std::endl;
out <<" other file formats in addition to its extension."<< std::endl;
out <<" -e extensionName - load reader/wrter plugin for file extension"<< std::endl;
out <<" i.e. -e pfb"<< std::endl;
out <<" Useful short hand for specifying full library name as"<< std::endl;
out <<" done with -l above, as it automatically expands to"<< std::endl;
out <<" the full library name appropriate for each platform."<< std::endl;
out <<std::endl;
out <<" -stereo - switch on stereo rendering, using the default of,"<< std::endl;
out <<" ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
out <<" environmental variable. See doc/stereo.html for "<< std::endl;
out <<" further details on setting up accurate stereo "<< std::endl;
out <<" for your system. "<< std::endl;
out <<" -stereo ANAGLYPHIC - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
out <<" -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
out <<std::endl;
out <<" -stencil - use a visual with stencil buffer enabled, this "<< std::endl;
out <<" also allows the depth complexity statistics mode"<< std::endl;
out <<" to be used (press 'p' three times to cycle to it)."<< std::endl;
out <<" -f - start with a full screen, borderless window." << std::endl;
out <<" -p pathfile - Use the AnimationPathManipulator (key binding '4') and use\n"
" pathfile to define the animation path. pathfile is an ascii\n"
" file containing lines of eight floating point numbers representing\n"
" time, position (x,y,z) and attitude (x,y,z,w as a quaternion)." << std::endl;
out << std::endl;
}
//== event trapper gets events
class geodemoEventHandler : public osgGA::GUIEventHandler
{
public:
geodemoEventHandler( ) {speed=0; heading=0; mouse_x=mouse_y=0;}
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
{
mouse_x=ea.getX();
mouse_y=ea.getY();
return false;
}
virtual void accept(osgGA::GUIEventHandlerVisitor& v)
{
v.visit(*this);
}
void moveit(userVars *l)
{
std::vector<geoValue> *lvals=l->getvars();
for (std::vector<geoValue>::iterator itr=lvals->begin();
itr!=lvals->end();
++itr) {// for each user var
if (itr->getName() == "xpos") {
itr->setVal((*itr->getValue())+speed*sin(heading));
// std::cout << " nx " << (*itr->getValue()) ;
} else if (itr->getName() == "ypos") {
itr->setVal((*itr->getValue())+speed*cos(heading));
// std::cout << " ny " << (*itr->getValue()) ;
} else if (itr->getName() == "sped") {
itr->setVal(0.00025*(mouse_y-300));
speed=(*itr->getValue());
// std::cout << " nspd " << speed << std::endl;
} else if (itr->getName() == "heading") {
itr->setVal((*itr->getValue())-0.0001*(mouse_x-400));
heading=(*itr->getValue());
// std::cout << " nhdg " << heading << std::endl;
} else if (itr->getName() == "conerot") {
itr->setVal((mouse_x-400));
} else if (itr->getName() == "planrot") {
itr->setVal((mouse_y-300)/200.0);
}
}
}
private:
int mouse_x, mouse_y;
float speed, heading;
};
static geodemoEventHandler *ghand=NULL;
void moveit(const double t, userVars *l,userVars *e)
{ // all the local and external variables declared in the geo modeller are here available.
ghand->moveit(l);
}
int main( int argc, char **argv )
{
std::string pathfile;
// initialize the GLUT
glutInit( &argc, argv );
if (argc<2)
{
write_usage(std::cout,argv[0]);
return 1;
}
// create the commandline args.
std::vector<std::string> commandLine;
for(int i=1;i<argc;++i) {
if( std::string(argv[i]) == "-p" ) {
if( (i+1) >= argc ) {
write_usage( std::cout, argv[0]);
return 1;
}
else
pathfile = std::string(argv[++i]);
}
else
commandLine.push_back(argv[i]);
}
// initialize the viewer.
osgGLUT::Viewer viewer;
viewer.setWindowTitle(argv[0]);
// configure the viewer from the commandline arguments, and eat any
// parameters that have been matched.
viewer.readCommandLine(commandLine);
// configure the plugin registry from the commandline arguments, and
// eat any parameters that have been matched.
osgDB::readCommandLine(commandLine);
// load the nodes from the commandline arguments.
osg::Node* rootnode = osgDB::readNodeFiles(commandLine);
if (!rootnode)
{
write_usage(osg::notify(osg::NOTICE),argv[0]);
return 1;
}
// run optimization over the scene graph
osgUtil::Optimizer optimzer;
optimzer.optimize(rootnode);
// add a viewport to the viewer and attach the scene graph.
viewer.addViewport( rootnode );
// register trackball, flight and drive.
viewer.registerCameraManipulator(new osgGA::TrackballManipulator);
viewer.registerCameraManipulator(new osgGA::FlightManipulator);
viewer.registerCameraManipulator(new osgGA::DriveManipulator);
if( !pathfile.empty() ) {
osgGA::AnimationPathManipulator *apm = new osgGA::AnimationPathManipulator(pathfile);
if( apm->valid() )
viewer.registerCameraManipulator(apm);
else
delete apm;
}
geoHeader *gh = dynamic_cast<geoHeader *>(rootnode);
if (gh)
{ // it is a geo file, so set function to update its animation variables.
ghand=new geodemoEventHandler();
gh->setUserUpdate(moveit);
viewer.prependEventHandler(ghand);
} else { // maybe a group with geo models below.
osg::Group *gpall=dynamic_cast<osg::Group *>(rootnode);
if (gpall) {
int nchild=gpall->getNumChildren();
for (int i=0; i<nchild; i++) {
osg::Node *nod=gpall->getChild(i);
gh = dynamic_cast<geoHeader *>(nod);
if (gh)
{
ghand=new geodemoEventHandler();
gh->setUserUpdate(moveit);
viewer.prependEventHandler(ghand);
}
}
}
}
// open the viewer window.
viewer.open();
// fire up the event loop.
viewer.run();
return 0;
}