Examples/Tutorial/08coresdemo.cpp

   1 // all needed include files
   2 #ifdef OSG_BUILD_ACTIVE
   3 #include <OSGGLUT.h>
   4 #include <OSGConfig.h>
   5 #include <OSGSimpleGeometry.h>
   6 #include <OSGGLUTWindow.h>
   7 #include <OSGSimpleSceneManager.h>
   8
   9 //additional headder files
  10 #include <OSGSceneFileHandler.h>
  11 #include <OSGDistanceLOD.h>
  12 #else
  13 #include <OpenSG/OSGGLUT.h>
  14 #include <OpenSG/OSGConfig.h>
  15 #include <OpenSG/OSGSimpleGeometry.h>
  16 #include <OpenSG/OSGGLUTWindow.h>
  17 #include <OpenSG/OSGSimpleSceneManager.h>
  18
  19 //additional headder files
  20 #include <OpenSG/OSGSceneFileHandler.h>
  21 #include <OpenSG/OSGDistanceLOD.h>
  22 #endif
  23
  24 OSG::SimpleSceneManagerRefPtr mgr;
  25 OSG::NodeRecPtr               scene;
  26
  27 int setupGLUT(int *argc, char *argv[]);
  28
  29 OSG::NodeTransitPtr createScenegraph(void)
  30 {
  31     //At first we load all needed models from file
  32     OSG::NodeRecPtr w_high   =
  33         OSG::SceneFileHandler::the()->read("Data/woman_high.wrl");
  34
  35     OSG::NodeRecPtr w_medium =
  36         OSG::SceneFileHandler::the()->read("Data/woman_medium.wrl");
  37
  38     OSG::NodeRecPtr w_low    = OSG::
  39         SceneFileHandler::the()->read("Data/woman_low.wrl");
  40
  41     //we check the result
  42     if((w_high == NULL) || (w_medium == NULL)|| (w_low == NULL))
  43     {
  44         std::cout << "It was not possible to load all needed models from file"
  45                   << std::endl;
  46         return OSG::NodeTransitPtr();
  47     }
  48
  49     //now the LOD core
  50     OSG::DistanceLODRecPtr lod = OSG::DistanceLOD::create();
  51     lod->editSFCenter()->setValue(OSG::Pnt3f(0,0,0));
  52     lod->editMFRange()->push_back(200);
  53     lod->editMFRange()->push_back(500);
  54
  55     //the node containing the LOD core. The three models will be
  56     //added as its children
  57     OSG::NodeRecPtr lodNode = OSG::Node::create();
  58     lodNode->setCore(lod);
  59     lodNode->addChild(w_high);
  60     lodNode->addChild(w_medium);
  61     lodNode->addChild(w_low);
  62
  63     OSG::NodeRecPtr root = OSG::Node::create();
  64     root->setCore (OSG::Group::create());
  65     root->addChild(lodNode);
  66
  67     return OSG::NodeTransitPtr(root);
  68 }
  69
  70 int main(int argc, char **argv)
  71 {
  72     OSG::osgInit(argc,argv);
  73
  74     {
  75         int winid = setupGLUT(&argc, argv);
  76         OSG::GLUTWindowRecPtr gwin = OSG::GLUTWindow::create();
  77         gwin->setGlutId(winid);
  78         gwin->init();
  79
  80         scene = createScenegraph();
  81
  82         mgr = OSG::SimpleSceneManager::create();
  83         mgr->setWindow(gwin );
  84         mgr->setRoot  (scene);
  85         mgr->showAll();
  86
  87         OSG::commitChanges();
  88     }
  89
  90     glutMainLoop();
  91
  92     return 0;
  93 }
  94
  95 void reshape(int w, int h)
  96 {
  97     mgr->resize(w, h);
  98     glutPostRedisplay();
  99 }
 100
 101 void display(void)
 102 {
 103     mgr->redraw();
 104 }
 105
 106 void mouse(int button, int state, int x, int y)
 107 {
 108     if (state)
 109         mgr->mouseButtonRelease(button, x, y);
 110     else
 111         mgr->mouseButtonPress(button, x, y);
 112
 113     glutPostRedisplay();
 114 }
 115
 116 void motion(int x, int y)
 117 {
 118     mgr->mouseMove(x, y);
 119     glutPostRedisplay();
 120 }
 121
 122 int setupGLUT(int *argc, char *argv[])
 123 {
 124     glutInit(argc, argv);
 125     glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
 126
 127     int winid = glutCreateWindow("OpenSG First Application");
 128
 129     glutDisplayFunc(display);
 130     glutMouseFunc(mouse);
 131     glutMotionFunc(motion);
 132     glutReshapeFunc(reshape);
 133     glutIdleFunc(display);
 134
 135     return winid;
 136 }