chart.cpp.in

学习 open inventor 的例子

setRandomDemoMode(void)
{
  static int prev = -1;
  int mode;
  while ( (mode = rand() % 10) == prev ) { }
  prev = mode; // = 9;
  int x, y;
  int w = 12;
  int d = 12;
  animateddemo = FALSE;
  startLevelEditing();

  switch ( mode ) {
  case 0:
    do {
      for ( y = 0; y < d; y++ )
        for ( x = 0; x < w; x++ )
          setLevel( w, d, x, y, 0.1f + float((x+y)*(x+y)) / 100.0f );
    } while ( 0 );
    break;
  case 1:
    do {
      for ( y = 0; y < d; y++ )
        for ( x = 0; x < w; x++ )
          setLevel( w, d, x, y, 0.0f );
    } while ( 0 );
    break;
  case 2:
    do {
      for ( y = 0; y < d; y++ ) {
        int disty;
        if ( y >= 6 ) disty = y - 6;
        else disty = 5 - y;
        disty = disty * disty;
        for ( x = 0; x < w; x++ ) {
          int distx;
          if ( x >= 6 ) distx = x - 6;
          else distx = 5 - x;
          float height = float(distx * distx + disty) * 0.05f;
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 3:
    do {
      for ( y = 0; y < d; y++ ) {
        int disty;
        if ( y >= 6 ) disty = 6 - (y - 6);
        else disty = 6 - (5 - y);
        disty = disty * disty;
        for ( x = 0; x < w; x++ ) {
          int distx;
          if ( x >= 6 ) distx = 6 - (x - 6);
          else distx = 6 - (5 - x);
          float height = float(distx * distx + disty) * 0.05f;
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 4:
    do {
      for ( y = 0; y < d; y++ )
        for ( x = 0; x < w; x++ )
          setLevel( w, d, x, y, 0.15 * float(x+y) );
    } while ( 0 );
    break;
  case 5:
    do {
      for ( y = 0; y < d; y++ ) {
        int disty;
        if ( y >= 6 ) disty = y - 6;
        else disty = 5 - y;
        disty = disty * disty;
        for ( x = 0; x < w; x++ ) {
          int distx;
          if ( x >= 6 ) distx = x - 6;
          else distx = 5 - x;
          float height = 4.0f - float(distx * distx + disty) * 0.05f;
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 6:
    do {
      for ( y = 0; y < d; y++ ) {
        for ( x = 0; x < w; x++ ) {
          int disty = -6 + y;
          disty = disty * disty;
          int distx = 6 - x;
          distx = distx * distx;
          float height = 2.0f + float(distx - disty) * 0.05f;
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 7:
    do {
      for ( y = 0; y < d; y++ ) {
        for ( x = 0; x < w; x++ ) {
          int disty = -6 + y;
          disty = disty * disty * disty;
          int distx = 6 - x;
          distx = distx * distx * distx;
          float height = 2.0f + float(distx - disty) * 0.008f;
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 8:
    do {
      for ( y = 0; y < d; y++ ) {
        for ( x = 0; x < w; x++ ) {
          float disty = 5.5 - float(y);
          float distx = 5.5 - float(x);
          disty = disty * disty;
          distx = distx * distx;
          float height = 4.0f;
          if ( x < 6 ) {
            if ( y < 6 )
              height += distx * disty * 0.004f;
            else
              height -= distx * disty * 0.004f;
          } else {
            if ( y < 6 )
              height += distx * disty * 0.004f;
            else
              height -= distx * disty * 0.004f;
          }
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  case 9:
    do {
      for ( y = 0; y < d; y++ ) {
        for ( x = 0; x < w; x++ ) {
          float disty = 5.5 - float(y);
          float distx = 5.5 - float(x);
          disty = disty * disty;
          distx = distx * distx;
          float height = 4.0f;
          if ( x < 6 ) {
            if ( y < 6 )
              height += distx * disty * 0.004f;
            else
              height -= distx * disty * 0.004f;
          } else {
            if ( y < 6 )
              height -= distx * disty * 0.004f;
            else
              height += distx * disty * 0.004f;
          }
          setLevel( w, d, x, y, height );
        }
      }
    } while ( 0 );
    break;
  } // case
  finishLevelEditing();
}

void
animateDemoMode(void)
{
}

void
event_cb(
  void * userdata,
  SoAction * actio )
{
  if ( demomode && actio->isOfType(SoGLRenderAction::getClassTypeId()) ) {
    SoGLRenderAction * action = (SoGLRenderAction *) actio;
    SbVec2s viewport = action->getViewportRegion().getWindowSize();
    if ( viewport != lastviewport ) {
      lastviewport = viewport;
      SoTranslation * translation = (SoTranslation *) findNode("menuposition");
      float aspect = float(viewport[0]) / float(viewport[1]);
      float factor = float(100)/float(viewport[1]) * 3.0f;
      if ( aspect > 1.0f ) {
	translation->translation.setValue(SbVec3f(-0.5f * aspect, 0.5f, 0.0f));
      } else {
	translation->translation.setValue(SbVec3f(-0.5f, 0.5f / aspect, 0.0f));
	factor /= aspect;
      }
      SoScale * scale = (SoScale *) findNode("menusize");
      scale->scaleFactor.setValue( SbVec3f(factor,factor,1.0f) );
    }
    SbTime now = SbTime::getTimeOfDay();
    if ( (now.getMsecValue() - demochange.getMsecValue()) > 4000 ) {
      demochange = now;
      setRandomDemoMode();
    } else if ( animateddemo ) {
      animateDemoMode();
    }
    return;
  }
  if ( actio->getTypeId() != SoHandleEventAction::getClassTypeId() ) return;
  SoHandleEventAction * action = (SoHandleEventAction *) actio;
  const SoEvent * event = action->getEvent();
  SoIndexedFaceSet * topfaces = (SoIndexedFaceSet *) findNode("topfaces");
  assert(topfaces != NULL);
  SoIndexedFaceSet * sidefaces = (SoIndexedFaceSet *) findNode("sidefaces");
  assert(sidefaces != NULL);
  SoIndexedFaceSet * demoface = (SoIndexedFaceSet *) findNode( "demoface" );
  SoAsciiText * demotext = (SoAsciiText *) findNode( "demotext" );
  SoIndexedFaceSet * interactface = (SoIndexedFaceSet *) findNode( "interactface" );
  SoAsciiText * interacttext = (SoAsciiText *) findNode( "interacttext" );

  if ( event->getTypeId() == SoMouseButtonEvent::getClassTypeId() ) {
    SoMouseButtonEvent * bevent = (SoMouseButtonEvent *) event;
    if ( bevent->getState() == SoButtonEvent::DOWN ) {
      if ( bevent->getButton() != SoMouseButtonEvent::BUTTON1 ) return;
      if ( ! picker ) picker = new SoRayPickAction(action->getViewportRegion());
      else picker->setViewportRegion(action->getViewportRegion());
      picker->setPoint( bevent->getPosition() );
      SoNode * menu = findNode("menu");
      SoNode * scene = findNode("scene");
      do {
        picker->apply(menu);
        SoPickedPoint * point = picker->getPickedPoint();
        if ( ! point ) break;
        SoPath * path = point->getPath();
        if ( ! path ) break;
        if ( path->getTail() == demoface || path->getTail() == demotext ) {
          if ( ! demomode ) {
            demochange = SbTime::getTimeOfDay();
            SoRotor * spin = (SoRotor *) findNode("spin");
            spin->on.setValue(TRUE);
            demomode = TRUE;
          }
        } else if ( path->getTail() == interactface
		    || path->getTail() == interacttext ) {
          if ( demomode ) {
            SoRotor * spin = (SoRotor *) findNode("spin");
            spin->on.setValue(FALSE);
            demomode = FALSE;
          }
        }
        return;
      } while ( FALSE );

      if ( demomode ) return;

      picker->apply(scene);
      SoPickedPoint * point = picker->getPickedPoint();
      if ( ! point ) return;
      SoPath * path = point->getPath();
      if ( ! path ) return;
      SoCamera * camera = viewer->getCamera();
      if ( ! camera ) return;
      if ( path->getTail() != topfaces
	   && path->getTail() != sidefaces ) return;
      attached = TRUE;
      SbVec3f pos = point->getObjectPoint();
      SbVec3f wpos = point->getPoint();
      if ( path->getTail() == topfaces ) {
        row = (int) pos[1];
        column = (int) pos[0];
        offset = 0.0f;
      } else {
        // get row and column from "fixed" pick position _inside_ the bar,
	// adjusted by the face normal
	const SoDetail * detail = point->getDetail();
	if ( ! detail || ! detail->isOfType(SoFaceDetail::getClassTypeId()) )
	  return;
	int faceidx = ((SoFaceDetail *)detail)->getFaceIndex();
	SoIndexedFaceSet * faceset = (SoIndexedFaceSet *) findNode("sidefaces");
	int normalidx = faceset->normalIndex[faceidx];
	SoNormal * normals = (SoNormal *) findNode("normals");
        SbVec3f fixedpos = pos - (normals->vector[normalidx] * 0.01f);
        row = (int) fixedpos[1];
        column = (int) fixedpos[0];
        offset = getLevel( 12, 12, column, row ) - pos[2];
      }
      mark( 12, 12, column, row, TRUE );
      char string[16];
      sprintf(string, "(%d,%d) %4.2f", column, row, getLevel(12, 12, column, row) );
      SoText2 * positiontext = (SoText2 *) findNode("positiontext");
      positiontext->string.setValue(string);
      SbVec3f point1(wpos[0], wpos[1], 0.0f);
      SbVec3f point2(wpos[0], wpos[1], 1.0f);
      SbVec3f point3(0, 0, 0);
      SbRotation rot( camera->orientation.getValue() );
      rot.multVec( SbVec3f( 1, 0, 0 ), point3 );
      if ( pickplane != NULL ) delete pickplane;
      pickplane = new SbPlane( point1, point2, point1 - point3 );
    } else if ( bevent->getState() == SoButtonEvent::UP ) {
      if ( bevent->getButton() != SoMouseButtonEvent::BUTTON1 ) return;
      mark( 12, 12, column, row, FALSE );
      SoText2 * positiontext = (SoText2 *) findNode("positiontext");
      positiontext->string.setValue("");
      attached = FALSE;
    }
    return;
  }
  if ( event->getTypeId() == SoLocation2Event::getClassTypeId() ) {
    if ( ! attached ) return;
    SoLocation2Event * levent = (SoLocation2Event *) event;
    if ( ! picker ) picker = new SoRayPickAction(viewer->getGLRenderAction()->getViewportRegion());
    picker->setPoint( levent->getPosition() );
    picker->apply(actio->getNodeAppliedTo());
    SbLine line( picker->getLine() );
    SbVec3f ipos;
    if ( pickplane->intersect(line, ipos)) {
      if ( (ipos[2] + offset) < 0 ) ipos[2] = 0 - offset;
      startLevelEditing();
      setLevel( 12, 12, (int) column, row, ipos[2] + offset );
      finishLevelEditing();
    }
    char string[16];
    sprintf(string, "(%d,%d) %4.2f", column, row, getLevel(12, 12, column, row) );
    SoText2 * positiontext = (SoText2 *) findNode("positiontext");
    positiontext->string.setValue(string);
  }
}

/************************************************************************ */
// the scene graph

char scene_iv[] = "\
#Inventor V2.1 ascii\n\
\n\
Separator {\n\
DEF scene Separator {\n\
PerspectiveCamera {}\n\
DEF spin Rotor {\n\
on TRUE\n\
speed 0.05\n\
}\n\
Translation { translation -6 -6 0 }\n\
ShapeHints {\n\
vertexOrdering COUNTERCLOCKWISE\n\
shapeType SOLID\n\
}\n\
DEF normals Normal {\n\
vector [ 1 0 0,  -1 0 0,  0 1 0,  0 -1 0,  0 0 1,  0 0 -1 ]\n\
}\n\
NormalBinding { value PER_FACE_INDEXED }\n\
DEF points Coordinate3 {}\n\
Separator {\n"
#ifdef HAVE_SOPOLYGONOFFSET
"PolygonOffset {\n\
factor 1\n\
units 1\n\
}\n"
#endif //!HAVE_SOPOLYGONOFFSET
"IndexedFaceSet {\n\
coordIndex [\n\
0, 1, 2, 3, 0, -1,  4, 7, 6, 5, 4, -1,  0, 4, 5, 1, 0, -1,\n\
1, 5, 6, 2, 1, -1,  2, 6, 7, 3, 2, -1,  3, 7, 4, 0, 3, -1\n\
]\n\
normalIndex [ 4, 5, 3, 0, 2, 1, -1 ]\n\
}\n\
}\n\
MaterialBinding { value PER_FACE_INDEXED }\n\
DEF materials Material {}\n\
DEF topfaces IndexedFaceSet {}\n\
DEF hook Callback {}\n\
DEF sidefaces IndexedFaceSet {}\n\
}\n\
DEF menu Separator {\n\
OrthographicCamera { height 1 }\n\
DirectionalLight {\n\
color 1 1 1\n\
direction 0 0 1\n\
}\n\
Coordinate3 {\n\
point [\n\
0.01 -0.17 -0.1,  0.01 -0.06 -0.1,  0.39 -0.06 -0.1,  0.39 -0.17 -0.1,\n\
0.01 -0.29 -0.1,  0.01 -0.18 -0.1,  0.39 -0.18 -0.1,  0.39 -0.29 -0.1,\n\
0.00  0.00 -0.2,  0.40  0.00 -0.2,  0.40 -0.40 -0.2,  0.00 -0.40 -0.2\n\
]\n\
}\n\
DEF menuposition Translation {}\n\
DEF menusize Scale {}\n\
Separator {\n\
Material { diffuseColor 0.7 0.2 0.2 }\n\
DEF baseface IndexedFaceSet { coordIndex [ 8, 9, 10, 11, 8, -1 ] }\n\
BaseColor { rgb 0 0 0 }\n\
Translation { translation 0.02 -0.05 0 }\n\
DEF wwwtext Text2 { string \"www.Coin3D.org\" }\n\
Translation { translation 0.02 -0.32 0 }\n\
DEF positiontext Text2 { string \"\" }\n\
}\n\
Separator {\n\
Material { diffuseColor 0 0.8 0.9 }\n\
DEF interactface IndexedFaceSet { coordIndex [ 4, 5, 6, 7, 4, -1 ] }\n\
Translation { translation 0.02 -0.27 0 }\n\
Scale { scaleFactor 0.01 0.01 0.01 }\n\
BaseColor { rgb 0 0 0 }\n\
DEF interacttext AsciiText { string \"Interact\" }\n\
}\n\
Separator {\n\
Material { diffuseColor 0 0.9 0.8 }\n\
DEF demoface IndexedFaceSet { coordIndex [ 0, 1, 2, 3, 0, -1 ] }\n\
Translation { translation 0.02 -0.15 0 }\n\
Scale { scaleFactor 0.01 0.01 0.01 }\n\
BaseColor { rgb 0 0 0 }\n\
DEF demotext AsciiText { string \"Demo\" }\n\
}\n}\n}\n";

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