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From Mike Weiblen, updates to osgGL2 to support Uniform values

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This commit is contained in:
Robert Osfield
2003-10-05 11:30:54 +00:00
parent 9d6bf8d1b6
commit ce15c880b1
17 changed files with 1350 additions and 319 deletions
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137
examples/osgshaders/osgshaders.cpp
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@@ -11,113 +11,108 @@
*/
/* file: examples/osgshaders/osgshaders.cpp
* author: Mike Weiblen 2003-07-14
* author: Mike Weiblen 2003-09-18
*
* A simple app skeleton for viewing OpenGL Shading Language shaders;
* derived from osgviewer.cpp from OSG 0.9.4-2
* A demo of the OpenGL Shading Language shaders using osgGL2.
*
* See http://www.3dlabs.com/opengl2/ for more information regarding
* the OpenGL Shading Language.
*/
#include <osg/Notify>
#include <osgGA/GUIEventAdapter>
#include <osgGA/GUIActionAdapter>
#include <osgDB/ReadFile>
#include <osgUtil/Optimizer>
#include <osgProducer/Viewer>
#include <osgGL2/Version>
#define GL2SCENE
osg::Node* GL2Scene();
void GL2Update();
#include "GL2Scene.h"
using namespace osg;
///////////////////////////////////////////////////////////////////////////
class KeyHandler: public osgGA::GUIEventHandler
{
public:
KeyHandler( GL2ScenePtr gl2Scene ) :
_gl2Scene(gl2Scene)
{}
bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& )
{
if( ea.getEventType() != osgGA::GUIEventAdapter::KEYDOWN )
return false;
switch( ea.getKey() )
{
case 'x':
_gl2Scene->reloadShaderSource();
return true;
case 'y':
_gl2Scene->toggleShaderEnable();
return true;
}
return false;
}
private:
GL2ScenePtr _gl2Scene;
};
///////////////////////////////////////////////////////////////////////////
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 OpenSceneGraph example which loads and visualises 3d models.");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
ArgumentParser args(&argc,argv);
// set up the usage document
args.getApplicationUsage()->setApplicationName(args.getApplicationName());
args.getApplicationUsage()->setDescription(args.getApplicationName() +
" demonstrates the OpenGL Shading Language using osgGL2");
args.getApplicationUsage()->setCommandLineUsage(args.getApplicationName());
args.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
args.getApplicationUsage()->addKeyboardMouseBinding( "x", "Reload and recompile shader source files." );
args.getApplicationUsage()->addKeyboardMouseBinding( "y", "Toggle shader enable" );
// construct the viewer.
osgProducer::Viewer viewer(arguments);
osgProducer::Viewer viewer(args);
viewer.setUpViewer( osgProducer::Viewer::STANDARD_SETTINGS );
viewer.getUsage( *args.getApplicationUsage() );
// set up the value with sensible default event handlers.
viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
// get details on keyboard and mouse bindings used by the viewer.
viewer.getUsage(*arguments.getApplicationUsage());
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
if( args.read("-h") || args.read("--help") )
{
arguments.getApplicationUsage()->write(std::cout);
args.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())
args.reportRemainingOptionsAsUnrecognized();
if( args.errors() )
{
arguments.writeErrorMessages(std::cout);
return 1;
}
#ifdef GL2SCENE //(
osg::ref_ptr<osg::Node> loadedModel = GL2Scene();
#else //)(
if (arguments.argc()<=1)
{
arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
args.writeErrorMessages(std::cout);
return 1;
}
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
// create the scene
notify(NOTICE) << "osgGL2 version " << osgGL2GetVersion() << std::endl;
GL2ScenePtr gl2Scene = new GL2Scene;
// if no model has been successfully loaded report failure.
if (!loadedModel)
{
std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
return 1;
}
// optimize the scene graph, remove rendundent nodes and state etc.
osgUtil::Optimizer optimizer;
optimizer.optimize(loadedModel.get());
#endif //)
// set the scene to render
viewer.setSceneData(loadedModel.get());
// create the windows and run the threads.
viewer.setSceneData( gl2Scene->getRootNode().get() );
viewer.getEventHandlerList().push_front( new KeyHandler(gl2Scene) );
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();
#ifdef GL2SCENE //(
GL2Update();
#endif //)
// 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();
return 0;
}
/*EOF*/