75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
// C++ source file - (C) 2003 Robert Osfield, released under the OSGPL.
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// (C) 2005 Mike Weiblen http://mew.cx/ released under the OSGPL.
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// Simple example using GLUT to create an OpenGL window and OSG for rendering.
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// Derived from osgsimple.cpp
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#include <iostream>
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#ifdef WIN32
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#include <windows.h>
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#endif
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#ifdef __APPLE__
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# include <GLUT/glut.h>
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#else
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# include <GL/glut.h>
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#endif
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#include <osgViewer/SimpleViewer>
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#include <osgDB/ReadFile>
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osg::ref_ptr<osgViewer::SimpleViewer> viewer;
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void display(void)
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{
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// update and render the scene
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viewer->frame();
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// Swap Buffers
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glutSwapBuffers();
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glutPostRedisplay();
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}
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void reshape( int w, int h )
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{
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// update the window dimensions, in case the window has been resized.
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viewer->getEventQueue()->windowResize(0, 0, w, h );
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}
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int main( int argc, char **argv )
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{
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glutInit(&argc, argv);
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if (argc<2)
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{
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std::cout << argv[0] <<": requires filename argument." << std::endl;
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return 1;
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}
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// load the scene.
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osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile(argv[1]);
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if (!loadedModel)
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{
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std::cout << argv[0] <<": No data loaded." << std::endl;
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return 1;
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}
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glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_ALPHA );
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glutInitWindowPosition( 100, 100 );
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glutInitWindowSize( 800, 600 );
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glutCreateWindow( argv[0] );
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glutDisplayFunc( display );
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glutReshapeFunc( reshape );
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// create the view of the scene.
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viewer = new osgViewer::SimpleViewer;
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viewer->setSceneData(loadedModel.get());
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// initialize the view to look at the center of the scene graph
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const osg::BoundingSphere& bs = loadedModel->getBound();
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viewer->getCamera()->setViewMatrixAsLookAt(bs.center()-osg::Vec3(0.0,2.0f*bs.radius(),0.0),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
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glutMainLoop();
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return 0;
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}
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/*EOF*/
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