C++ SbBox3f::transform方法代码示例

void
SoXipMenuBase::GLRender( SoGLRenderAction* action )
{
	if( on.getValue() == FALSE )
		return ;

	// Compute the 3D position of the menu, given the mouse 2D position
	saveViewInformation( action );

	mMenuOffset->translation.setValue( mPlaneProj->project( position.getValue() ) );

	SoGetBoundingBoxAction bba( action->getViewportRegion() );
	bba.apply( mMenuSeparator );

	SbBox3f bbox = bba.getBoundingBox();
	bbox.transform( mModelMatrix );

	float viewportAR = mViewport.getViewportAspectRatio();
	SbVec3f screenOffset(0, 0, 0);
	if( viewportAR < 1. )
	{
		screenOffset[0] = bbox.getMax()[0] - 1.;
		screenOffset[1] = bbox.getMax()[1] - 1. / viewportAR;
	}
	else
	{
		screenOffset[0] = bbox.getMax()[0] - viewportAR;
		screenOffset[1] = bbox.getMax()[1] - 1;
	}

	if( screenOffset[0] < 0 )
		screenOffset[0] = 0;
	if( screenOffset[1] < 0 )
		screenOffset[1] = 0;

	SbVec3f worldOffset;
	mModelMatrix.inverse().multVecMatrix( screenOffset, worldOffset );

	mMenuOffset->translation.setValue( mMenuOffset->translation.getValue() - worldOffset );

	glPushAttrib( GL_ENABLE_BIT );
	glDisable( GL_DEPTH_TEST );

	SoXipKit::GLRender( action );

	glPopAttrib();
}

  const SbOctTree * getOctTree(void) {
    if (this->octtree == NULL) {
      const SbOctTreeFuncs funcs = {
        NULL /* ptinsidefunc */,
        PrimitiveData::insideboxfunc,
        NULL /* insidespherefunc */,
        NULL /* insideplanesfunc */
      };

      SbBox3f b = this->getBoundingBox();
      // Add a 1% slack to the bounding box, to avoid problems in
      // SbOctTree due to floating point inaccuracies (see assert() in
      // SbOctTree::addItem()).
      //
      // This may be just a temporary hack -- see the FIXME at the
      // same place as mentioned above.
      SbMatrix m;
      m.setTransform(SbVec3f(0, 0, 0), // translation
                     SbRotation::identity(), // rotation
                     SbVec3f(1.01f, 1.01f, 1.01f), // scalefactor
                     SbRotation::identity(), // scaleorientation
                     SbVec3f(b.getCenter())); // center
      b.transform(m);

      this->octtree = new SbOctTree(b, funcs);

      if (ida_debug()) {
        SoDebugError::postInfo("PrimitiveData::getOctTree",
                               "made new octtree for PrimitiveData %p", this);
      }

      for (unsigned int k = 0; k < this->numTriangles(); k++) {
        SbTri3f * t = this->getTriangle(k);
        this->octtree->addItem(t);
      }
    }
    return this->octtree;
  }

// Execute full set of intersection detection operations on all the
// primitives that has been souped up from the scene graph.
void
SoIntersectionDetectionAction::PImpl::doIntersectionTesting(void)
{
  if (this->callbacks.empty()) {
    SoDebugError::postWarning("SoIntersectionDetectionAction::PImpl::doIntersectionTesting",
                              "intersection testing invoked, but no callbacks set up");
    return;
  }

  delete this->traverser;
  this->traverser = NULL;

  if (ida_debug()) {
    SoDebugError::postInfo("SoIntersectionDetectionAction::PImpl::doIntersectionTesting",
                           "total number of shapedata items == %d",
                           this->shapedata.getLength());

  }

  const SbOctTreeFuncs funcs = {
    NULL /* ptinsidefunc */,
    shapeinsideboxfunc,
    NULL /* insidespherefunc */,
    NULL /* insideplanesfunc */
  };

  SbBox3f b = this->fullxfbbox.project();
  // Add a 1% slack to the bounding box, to avoid problems in
  // SbOctTree due to floating point inaccuracies (see assert() in
  // SbOctTree::addItem()).
  //
  // This may be just a temporary hack -- see the FIXME at the
  // same place.
  SbMatrix m;
  m.setTransform(SbVec3f(0, 0, 0), // translation
                 SbRotation::identity(), // rotation
                 SbVec3f(1.01f, 1.01f, 1.01f), // scalefactor
                 SbRotation::identity(), // scaleorientation
                 SbVec3f(b.getCenter())); // center
  b.transform(m);

  SbOctTree shapetree(b, funcs);
  for (int k = 0; k < this->shapedata.getLength(); k++) {
    ShapeData * shape = this->shapedata[k];
    if (shape->xfbbox.isEmpty()) { continue; }
    shapetree.addItem(shape);
  }

  if (ida_debug()) { shapetree.debugTree(stderr); }

  // For debugging.
  unsigned int nrshapeshapeisects = 0;
  unsigned int nrselfisects = 0;

  const float theepsilon = this->getEpsilon();

  for (int i = 0; i < this->shapedata.getLength(); i++) {
    ShapeData * shape1 = this->shapedata[i];

    // If the shape has no geometry, immediately skip to next
    // iteration of for-loop.
    if (shape1->xfbbox.isEmpty()) { continue; }

    // Remove shapes from octtree as we iterate over the full set, to
    // avoid self-intersection and to avoid checks against other
    // shapes happening both ways.
    shapetree.removeItem(shape1);

    // FIXME: shouldn't we also invoke the filter-callback here? 20030403 mortene.
    if (this->internalsenabled) {
      nrselfisects++;
      SbBool cont;
      this->doInternalPrimitiveIntersectionTesting(shape1->getPrimitives(), cont);
      if (!cont) { goto done; }
    }

    SbBox3f shapebbox = shape1->xfbbox.project();
    if (theepsilon > 0.0f) {
      const SbVec3f e(theepsilon, theepsilon, theepsilon);
      // Extend bbox in all 6 directions with the epsilon value.
      shapebbox.getMin() -= e;
      shapebbox.getMax() += e;
    }
    SbList<void*> candidateshapes;
    shapetree.findItems(shapebbox, candidateshapes);

    if (ida_debug()) {
      SoDebugError::postInfo("SoIntersectionDetectionAction::PImpl::doIntersectionTesting",
                             "shape %d intersects %d other shapes",
                             i, candidateshapes.getLength());

      // debug, dump to .iv-file the "master" shape bbox given by i,
      // plus ditto for all intersected shapes
#if 0
      if (i == 4) {
        SoSeparator * root = new SoSeparator;
        root->ref();

//.........这里部分代码省略.........