styx.cpp.in

学习 open inventor 的例子

  if ( points[1][0] < 0.0f || points[1][0] > 300.0f ) p2dir[0] = 0.0f - p2dir[0];
  if ( points[1][1] < 0.0f || points[1][1] > 200.0f ) p2dir[1] = 0.0f - p2dir[1];
  if ( points[1][2] < 0.0f || points[1][2] > 200.0f ) p2dir[2] = 0.0f - p2dir[2];

  for ( i = 0; i < (LINES * 2); i++ ) {
    if ( points[i][0] < 0.0f )        points[i][0] = 0.0f - points[i][0];
    else if ( points[i][0] > 300.0f ) points[i][0] = 600.0f - points[i][0];
    if ( points[i][1] < 0.0f )        points[i][1] = 0.0f - points[i][1];
    else if ( points[i][1] > 200.0f ) points[i][1] = 400.0f - points[i][1];
    if ( points[i][2] < 0.0f )        points[i][2] = 0.0f - points[i][2];
    else if ( points[i][2] > 200.0f ) points[i][2] = 400.0f - points[i][2];
  }

  p1dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir.normalize();
  p2dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir.normalize();
  coords->point.finishEditing();
}

void
tickLines2(SoCoordinate3 * coords)
{
  static SbBool initialized = FALSE;
  static SbVec3f p1dir;
  static SbVec3f p2dir;
  int i;

  if ( ! initialized ) {
    initialized = TRUE;
    p1dir.setValue(0, 1, 0);
    p2dir.setValue(0, 1, 0);
  }
  SbVec3f * points = coords->point.startEditing();

  for ( i = 0; i < (LINES * 2); i++ ) {
    if ( (i / 2) == 0 ) {
      if ( (i&1) == 0 ) points[i] += p1dir * 5;
      else              points[i] += p2dir * 5;
    } else {
      SbVec3f gravity = points[i-2] - points[i];
      if ( (i&1) == 0 ) points[i] += (gravity * 0.2f);
      else              points[i] += (gravity * 0.2f);
    }
  }

  if ( points[0][0] < 0.0f || points[0][0] > 300.0f ) p1dir[0] = 0.0f - p1dir[0];
  if ( points[0][1] < 0.0f || points[0][1] > 200.0f ) p1dir[1] = 0.0f - p1dir[1];
  if ( points[0][2] < 0.0f || points[0][2] > 200.0f ) p1dir[2] = 0.0f - p1dir[2];

  if ( points[1][0] < 0.0f || points[1][0] > 300.0f ) p2dir[0] = 0.0f - p2dir[0];
  if ( points[1][1] < 0.0f || points[1][1] > 200.0f ) p2dir[1] = 0.0f - p2dir[1];
  if ( points[1][2] < 0.0f || points[1][2] > 200.0f ) p2dir[2] = 0.0f - p2dir[2];

  for ( i = 0; i < (LINES * 2); i++ ) {
    if ( points[i][0] < 0.0f )        points[i][0] = 0.0f - points[i][0];
    else if ( points[i][0] > 300.0f ) points[i][0] = 600.0f - points[i][0];
    if ( points[i][1] < 0.0f )        points[i][1] = 0.0f - points[i][1];
    else if ( points[i][1] > 200.0f ) points[i][1] = 400.0f - points[i][1];
    if ( points[i][2] < 0.0f )        points[i][2] = 0.0f - points[i][2];
    else if ( points[i][2] > 200.0f ) points[i][2] = 400.0f - points[i][2];
  }

  p1dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir.normalize();
  p2dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir.normalize();
  coords->point.finishEditing();
}

void
tickLines3(SoCoordinate3 * coords)
{
  static SbBool initialized = FALSE;
  static SbVec3f p1dir;
  static SbVec3f p2dir;
  int i;

  if ( ! initialized ) {
    initialized = TRUE;
    p1dir.setValue(0, 1, 0);
    p2dir.setValue(0, 1, 0);
  }
  SbVec3f * points = coords->point.startEditing();

  for ( i = 0; i < (LINES * 2); i++ ) {
    if ( (i / 2) == 0 ) {
      if ( (i&1) == 0 ) points[i] += p1dir * 5;
      else              points[i] += p2dir * 5;
    } else {
      SbVec3f gravity = points[i-2] - points[i];
      if ( (i&1) == 0 ) points[i] += (gravity * 0.2f);
      else              points[i] += (gravity * 0.2f);
    }
  }

  if ( points[0][0] < 0.0f || points[0][0] > 300.0f ) p1dir[0] = 0.0f - p1dir[0];
  if ( points[0][1] < 0.0f || points[0][1] > 200.0f ) p1dir[1] = 0.0f - p1dir[1];
  if ( points[0][2] < 0.0f || points[0][2] > 200.0f ) p1dir[2] = 0.0f - p1dir[2];

  if ( points[1][0] < 0.0f || points[1][0] > 300.0f ) p2dir[0] = 0.0f - p2dir[0];
  if ( points[1][1] < 0.0f || points[1][1] > 200.0f ) p2dir[1] = 0.0f - p2dir[1];
  if ( points[1][2] < 0.0f || points[1][2] > 200.0f ) p2dir[2] = 0.0f - p2dir[2];

  for ( i = 0; i < (LINES * 2); i++ ) {
    if ( points[i][0] < 0.0f )        points[i][0] = 0.0f - points[i][0];
    else if ( points[i][0] > 300.0f ) points[i][0] = 600.0f - points[i][0];
    if ( points[i][1] < 0.0f )        points[i][1] = 0.0f - points[i][1];
    else if ( points[i][1] > 200.0f ) points[i][1] = 400.0f - points[i][1];
    if ( points[i][2] < 0.0f )        points[i][2] = 0.0f - points[i][2];
    else if ( points[i][2] > 200.0f ) points[i][2] = 400.0f - points[i][2];
  }

  p1dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p1dir.normalize();
  p2dir[0] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[1] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir[2] += (fmod(float(rand())/200.0f,10.0f)-5.0f) / 50.0f;
  p2dir.normalize();
  coords->point.finishEditing();
}

void
initPoints(SoCoordinate3 * coords)
{
  float floats[POINTS][3]; // = new float [ POINTS ][ 3 ];
  for ( int i = 0; i < POINTS; i++ ) {
    if ( i < POINTS/4 ) {
      floats[i][0] = (float) (rand() % 301);
      floats[i][1] = 0.0f;
      floats[i][2] = (float) (rand() % 201);
    } else if ( i < POINTS/2 ) {
      floats[i][0] = (float) (rand() % 301);
      floats[i][1] = (float) (rand() % 201);
      floats[i][2] = 0.0f;
    } else if ( i < (3*POINTS)/4 ) {
      floats[i][0] = (float) (rand() % 301);
      floats[i][1] = 200.0f;
      floats[i][2] = (float) (rand() % 201);
    } else {
      floats[i][0] = (float) (rand() % 301);
      floats[i][1] = (float) (rand() % 201);
      floats[i][2] = 200.0f;
    }
  }
  coords->point.setValues(0, POINTS, floats);
}

void
tickPoints(SoCoordinate3 * coords)
{
  static float * speed = NULL;
  int i;
  if ( ! speed ) {
    speed = new float [ POINTS ];
    for ( i = 0; i < POINTS; i++ ) {
      speed[i] = 2.0f + fmod(float(rand())/20.0f, 3.0f);
    }
  }
  SbVec3f * points = coords->point.startEditing();
  for ( i = 0; i < POINTS; i++ ) {
    points[i][0] -= speed[i];
    if ( points[i][0] < 0 ) points[i][0] += 300.0f;
  }
  coords->point.finishEditing();
}

/* ********************************************************************** */

void
event_cb(void * closure, SoAction * action)
{
  So@Gui@ExaminerViewer * viewer = (So@Gui@ExaminerViewer *) closure;
  if ( action->isOfType(SoGLRenderAction::getClassTypeId()) ) {
    SoGLRenderAction * raaction = (SoGLRenderAction *) action;
    SoNode * scene = action->getNodeAppliedTo();
    if ( scene ) {
      tickLines1((SoCoordinate3 *) getNodeByName(scene, "redlines"));
      tickLines2((SoCoordinate3 *) getNodeByName(scene, "greenlines"));
      tickLines3((SoCoordinate3 *) getNodeByName(scene, "bluelines"));
      tickPoints((SoCoordinate3 *) getNodeByName(scene, "points"));
    }
  }
}

/* ********************************************************************** */

int
main(
  int argc,
  char ** argv )
{
  setbuf(stderr, NULL);
  setbuf(stdout, NULL);
  @WIDGET@ window = So@Gui@::init(argv[0]);

  srand(SbTime::getTimeOfDay().getMsecValue());

  So@Gui@ExaminerViewer * viewer = new So@Gui@ExaminerViewer(window);
  viewer->setTransparencyType(SoGLRenderAction::DELAYED_BLEND);
  viewer->setDecoration(FALSE);

  SoInput * in = new SoInput;
  unsigned int len;
  char * buffer = strconcat(scenegraph, len);
  in->setBuffer(buffer, len);
  SoNode * scene;
  if ( ! SoDB::read(in, scene) ) {
    delete [] buffer;
    delete in;
    delete viewer;
    fprintf(stderr, "%s: error in scene - exiting.\n", argv[0]);
    exit(-1);
  }
  delete [] buffer;
  delete in;
  scene->ref();

  // FIXME: for some reason, getNodeByName() doesn't work with SGI
  // Inventor. Investigate.  20010919 mortene.
  SoCallback * hook = (SoCallback *) getNodeByName(scene, "hook");
  if ( ! hook ) {
    fprintf(stderr, "hook not installed.\n");
  } else {
    hook->setCallback(event_cb, viewer);
  }

  initLines((SoCoordinate3 *) getNodeByName(scene, "redlines"));
  initLines((SoCoordinate3 *) getNodeByName(scene, "greenlines"));
  initLines((SoCoordinate3 *) getNodeByName(scene, "bluelines"));
  initPoints((SoCoordinate3 *) getNodeByName(scene, "points"));

  scene->unrefNoDelete();
  viewer->setSceneGraph(scene);
#ifdef HAVE_SOCOMPONENT_SETFULLSCREEN
  viewer->setFullScreen(TRUE); // might be too slow?
#endif // HAVE_SOCOMPONENT_SETFULLSCREEN
  viewer->show();
  viewer->viewAll();
  viewer->setTitle("Styx Demo");
  So@Gui@::show(window);
  So@Gui@::mainLoop();
  delete viewer;
  return 0;
}

/* EOF ****************************************************************** */