Examples/Tutorial/13multithreading.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 #include <OSGThreadManager.h>
  10 #else
  11 #include <OpenSG/OSGGLUT.h>
  12 #include <OpenSG/OSGConfig.h>
  13 #include <OpenSG/OSGSimpleGeometry.h>
  14 #include <OpenSG/OSGGLUTWindow.h>
  15 #include <OpenSG/OSGSimpleSceneManager.h>
  16
  17 #include <OpenSG/OSGThreadManager.h>
  18 #endif
  19
  20 OSG::SimpleSceneManagerRefPtr mgr;
  21 OSG::NodeRecPtr               scene;
  22
  23 int setupGLUT(int *argc, char *argv[]);
  24
  25 OSG::NodeTransitPtr createScenegraph(void)
  26 {
  27     // the scene must be created here
  28     OSG::NodeRecPtr n = OSG::makeSphere(2,2);
  29     return OSG::NodeTransitPtr(n);
  30 }
  31
  32 void printA(void *args)
  33 {
  34     while (true)
  35         SLOG << "Thread One 11111" << std::endl;
  36 }
  37
  38 void printB(void *args)
  39 {
  40     while (true)
  41         SLOG << "Thread Two 22222" << std::endl;
  42 }
  43
  44 int main(int argc, char **argv)
  45 {
  46     OSG::osgInit(argc,argv);
  47
  48     {
  49         int winid = setupGLUT(&argc, argv);
  50         OSG::GLUTWindowRecPtr gwin= OSG::GLUTWindow::create();
  51         gwin->setGlutId(winid);
  52         gwin->init();
  53
  54         scene = createScenegraph();
  55
  56         mgr = OSG::SimpleSceneManager::create();
  57         mgr->setWindow(gwin );
  58         mgr->setRoot  (scene);
  59         mgr->showAll();
  60
  61         OSG::ThreadRefPtr threadOne =
  62             OSG::dynamic_pointer_cast<OSG::Thread>(
  63                 OSG::ThreadManager::the()->getThread("One", false));
  64
  65         OSG::ThreadRefPtr threadTwo =
  66             OSG::dynamic_pointer_cast<OSG::Thread>(
  67                 OSG::ThreadManager::the()->getThread("Two", false));
  68
  69         threadOne->runFunction(printA, 1, NULL);
  70         threadTwo->runFunction(printB, 1, NULL);
  71
  72         OSG::commitChanges();
  73     }
  74
  75     glutMainLoop();
  76
  77     return 0;
  78 }
  79
  80 void reshape(int w, int h)
  81 {
  82     mgr->resize(w, h);
  83     glutPostRedisplay();
  84 }
  85
  86 void display(void)
  87 {
  88         mgr->redraw();
  89 }
  90
  91 void mouse(int button, int state, int x, int y)
  92 {
  93     if (state)
  94         mgr->mouseButtonRelease(button, x, y);
  95     else
  96         mgr->mouseButtonPress(button, x, y);
  97
  98     glutPostRedisplay();
  99 }
 100
 101 void motion(int x, int y)
 102 {
 103     mgr->mouseMove(x, y);
 104     glutPostRedisplay();
 105 }
 106
 107 int setupGLUT(int *argc, char *argv[])
 108 {
 109     glutInit(argc, argv);
 110     glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
 111
 112     int winid = glutCreateWindow("OpenSG First Application");
 113
 114     glutDisplayFunc(display);
 115     glutMouseFunc(mouse);
 116     glutMotionFunc(motion);
 117     glutReshapeFunc(reshape);
 118     glutIdleFunc(display);
 119
 120     return winid;
 121 }