C++ SoCamera::getViewVolume方法代码示例

void TaskCreateNodeSet::DefineNodesCallback(void * ud, SoEventCallback * n)
{
    // show the wait cursor because this could take quite some time
    Gui::WaitCursor wc;

    TaskCreateNodeSet *taskBox = static_cast<TaskCreateNodeSet *>(ud);


    // When this callback function is invoked we must in either case leave the edit mode
    Gui::View3DInventorViewer* view  = reinterpret_cast<Gui::View3DInventorViewer*>(n->getUserData());
    view->setEditing(false);
    view->removeEventCallback(SoMouseButtonEvent::getClassTypeId(), DefineNodesCallback,ud);
    n->setHandled();

    SbBool clip_inner;
    std::vector<SbVec2f> clPoly = view->getGLPolygon(&clip_inner);
    if (clPoly.size() < 3)
        return;
    if (clPoly.front() != clPoly.back())
        clPoly.push_back(clPoly.front());

    SoCamera* cam = view->getSoRenderManager()->getCamera();
    SbViewVolume vv = cam->getViewVolume();
    Gui::ViewVolumeProjection proj(vv);
    Base::Polygon2D polygon;
    for (std::vector<SbVec2f>::const_iterator it = clPoly.begin(); it != clPoly.end(); ++it)
        polygon.Add(Base::Vector2D((*it)[0],(*it)[1]));

    taskBox->DefineNodes(polygon,proj,clip_inner);

}

    static void selectionCallback(void * ud, SoEventCallback * cb)
    {
        Gui::View3DInventorViewer* view  = reinterpret_cast<Gui::View3DInventorViewer*>(cb->getUserData());
        view->removeEventCallback(SoMouseButtonEvent::getClassTypeId(), selectionCallback, ud);
        SoNode* root = view->getSceneGraph();
        static_cast<Gui::SoFCUnifiedSelection*>(root)->selectionRole.setValue(true);

        std::vector<SbVec2f> picked = view->getGLPolygon();
        SoCamera* cam = view->getSoRenderManager()->getCamera();
        SbViewVolume vv = cam->getViewVolume();
        Gui::ViewVolumeProjection proj(vv);
        Base::Polygon2d polygon;
        if (picked.size() == 2) {
            SbVec2f pt1 = picked[0];
            SbVec2f pt2 = picked[1];
            polygon.Add(Base::Vector2d(pt1[0], pt1[1]));
            polygon.Add(Base::Vector2d(pt1[0], pt2[1]));
            polygon.Add(Base::Vector2d(pt2[0], pt2[1]));
            polygon.Add(Base::Vector2d(pt2[0], pt1[1]));
        }
        else {
            for (std::vector<SbVec2f>::const_iterator it = picked.begin(); it != picked.end(); ++it)
                polygon.Add(Base::Vector2d((*it)[0],(*it)[1]));
        }

        FaceColors* self = reinterpret_cast<FaceColors*>(ud);
        self->d->view = 0;
        if (self->d->obj && self->d->obj->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
            cb->setHandled();
            const TopoDS_Shape& shape = static_cast<Part::Feature*>(self->d->obj)->Shape.getValue();
            self->d->addFacesToSelection(view, proj, polygon, shape);
            view->redraw();
        }
    }

void ViewProviderStructured::cut(const std::vector<SbVec2f>& picked, Gui::View3DInventorViewer &Viewer)
{
    // create the polygon from the picked points
    Base::Polygon2D cPoly;
    for (std::vector<SbVec2f>::const_iterator it = picked.begin(); it != picked.end(); ++it) {
        cPoly.Add(Base::Vector2D((*it)[0],(*it)[1]));
    }

    // get a reference to the point feature
    Points::Feature* fea = static_cast<Points::Feature*>(pcObject);
    const Points::PointKernel& points = fea->Points.getValue();

    SoCamera* pCam = Viewer.getSoRenderManager()->getCamera();
    SbViewVolume  vol = pCam->getViewVolume();

    // search for all points inside/outside the polygon
    Points::PointKernel newKernel;
    newKernel.reserve(points.size());

    bool invalidatePoints = false;
    double nan = std::numeric_limits<double>::quiet_NaN();
    for (Points::PointKernel::const_iterator jt = points.begin(); jt != points.end(); ++jt) {
        // valid point?
        Base::Vector3d vec(*jt);
        if (!(boost::math::isnan(jt->x) || boost::math::isnan(jt->y) || boost::math::isnan(jt->z))) {
            SbVec3f pt(jt->x,jt->y,jt->z);

            // project from 3d to 2d
            vol.projectToScreen(pt, pt);
            if (cPoly.Contains(Base::Vector2D(pt[0],pt[1]))) {
                invalidatePoints = true;
                vec.Set(nan, nan, nan);
            }
        }

        newKernel.push_back(vec);
    }

    if (invalidatePoints) {
        //Remove the points from the cloud and open a transaction object for the undo/redo stuff
        Gui::Application::Instance->activeDocument()->openCommand("Cut points");

        // sets the points outside the polygon to update the Inventor node
        fea->Points.setValue(newKernel);

        // unset the modified flag because we don't need the features' execute() to be called
        Gui::Application::Instance->activeDocument()->commitCommand();
        fea->purgeTouched();
    }
}

bool ViewProviderMeshNode::handleEvent(const SoEvent * const ev,Gui::View3DInventorViewer &Viewer)
{
  if ( m_bEdit )
  {
    unsetEdit();
    std::vector<SbVec2f> clPoly = Viewer.getPickedPolygon();
    if ( clPoly.size() < 3 )
      return true;
    if ( clPoly.front() != clPoly.back() )
      clPoly.push_back(clPoly.front());

    // get the normal of the front clipping plane
    SbVec3f b,n;
    Viewer.getNearPlane(b, n);
    Base::Vector3f cPoint(b[0],b[1],b[2]), cNormal(n[0],n[1],n[2]);
    SoCamera* pCam = Viewer.getCamera();  
    SbViewVolume  vol = pCam->getViewVolume (); 

    // create a tool shape from these points
    std::vector<MeshCore::MeshGeomFacet> aFaces;
    bool ok = ViewProviderMesh::createToolMesh( clPoly, vol, cNormal, aFaces );

    // Get the attached mesh property
    Mesh::PropertyMeshKernel& meshProp = ((Mesh::Feature*)pcObject)->Mesh;

    // Get the facet indices inside the tool mesh
    std::vector<unsigned long> indices;
    MeshCore::MeshKernel cToolMesh;
    cToolMesh = aFaces;
    MeshCore::MeshFacetGrid cGrid(meshProp.getValue().getKernel());
    MeshCore::MeshAlgorithm cAlg(meshProp.getValue().getKernel());
    cAlg.GetFacetsFromToolMesh(cToolMesh, cNormal, cGrid, indices);
    meshProp.deleteFacetIndices( indices );

      // update open edge display if needed
//      if ( pcOpenEdge ) 
//      {
//        showOpenEdges(false);
//        showOpenEdges(true);
//      }

    Viewer.render();
    if ( !ok ) // note: the mouse grabbing needs to be released
      //QMessageBox::warning(Viewer.getWidget(),"Invalid polygon","The picked polygon seems to have self-overlappings.\n\nThis could lead to strange rersults.");
      Base::Console().Message("The picked polygon seems to have self-overlappings. This could lead to strange results.");
  }

  return false;
}

void SoFCCSysDragger::idleCB(void *data, SoSensor *)
{
    SoFCCSysDragger *sudoThis = reinterpret_cast<SoFCCSysDragger *>(data);
    SoField* field = sudoThis->cameraSensor.getAttachedField();
    if (field)
    {
        SoCamera* camera = static_cast<SoCamera*>(field->getContainer());
        SbMatrix localToWorld = sudoThis->getLocalToWorldMatrix();
        SbVec3f origin;
        localToWorld.multVecMatrix(SbVec3f(0.0, 0.0, 0.0), origin);

        SbViewVolume viewVolume = camera->getViewVolume();
        float radius = sudoThis->draggerSize.getValue() / 2.0;
        float localScale = viewVolume.getWorldToScreenScale(origin, radius);
        SbVec3f scaleVector(localScale, localScale, localScale);
        SoScale *localScaleNode = SO_GET_ANY_PART(sudoThis, "scaleNode", SoScale);
        localScaleNode->scaleFactor.setValue(scaleVector);
        sudoThis->autoScaleResult.setValue(localScale);
    }
}

void ViewProviderPoints::cut(const std::vector<SbVec2f>& picked, Gui::View3DInventorViewer &Viewer)
{
    // create the polygon from the picked points
    Base::Polygon2D cPoly;
    for (std::vector<SbVec2f>::const_iterator it = picked.begin(); it != picked.end(); ++it) {
        cPoly.Add(Base::Vector2D((*it)[0],(*it)[1]));
    }

    // get a reference to the point feature
    Points::Feature* fea = (Points::Feature*)pcObject;
    const Points::PointKernel& points = fea->Points.getValue();

    SoCamera* pCam = Viewer.getSoRenderManager()->getCamera();  
    SbViewVolume  vol = pCam->getViewVolume(); 

    // search for all points inside/outside the polygon
    Points::PointKernel newKernel;
    for ( Points::PointKernel::const_iterator jt = points.begin(); jt != points.end(); ++jt ) {
        SbVec3f pt(jt->x,jt->y,jt->z);

        // project from 3d to 2d
        vol.projectToScreen(pt, pt);
        if (!cPoly.Contains(Base::Vector2D(pt[0],pt[1])))
            newKernel.push_back(*jt);
    }

    if (newKernel.size() == points.size())
        return; // nothing needs to be done

    //Remove the points from the cloud and open a transaction object for the undo/redo stuff
    Gui::Application::Instance->activeDocument()->openCommand("Cut points");

    // sets the points outside the polygon to update the Inventor node
    fea->Points.setValue(newKernel);

    // unset the modified flag because we don't need the features' execute() to be called
    Gui::Application::Instance->activeDocument()->commitCommand();
    fea->purgeTouched();
}

void DefineNodesCallback(void * ud, SoEventCallback * n)
{
    Fem::FemAnalysis        *Analysis;

    if(getConstraintPrerequisits(&Analysis))
        return;

    // show the wait cursor because this could take quite some time
    Gui::WaitCursor wc;

    // When this callback function is invoked we must in either case leave the edit mode
    Gui::View3DInventorViewer* view  = reinterpret_cast<Gui::View3DInventorViewer*>(n->getUserData());
    view->setEditing(false);
    view->removeEventCallback(SoMouseButtonEvent::getClassTypeId(), DefineNodesCallback,ud);
    n->setHandled();

    SbBool clip_inner;
    std::vector<SbVec2f> clPoly = view->getGLPolygon(&clip_inner);
    if (clPoly.size() < 3)
        return;
    if (clPoly.front() != clPoly.back())
        clPoly.push_back(clPoly.front());

    SoCamera* cam = view->getCamera();
    SbViewVolume vv = cam->getViewVolume();
    Gui::ViewVolumeProjection proj(vv);
    Base::Polygon2D polygon;
    for (std::vector<SbVec2f>::const_iterator it = clPoly.begin(); it != clPoly.end(); ++it)
        polygon.Add(Base::Vector2D((*it)[0],(*it)[1]));


    std::vector<App::DocumentObject*> docObj = Gui::Selection().getObjectsOfType(Fem::FemMeshObject::getClassTypeId());
    if(docObj.size() !=1)
        return;

    const SMESHDS_Mesh* data = const_cast<SMESH_Mesh*>(dynamic_cast<Fem::FemMeshObject*>(docObj[0])->FemMesh.getValue().getSMesh())->GetMeshDS();

    SMDS_NodeIteratorPtr aNodeIter = data->nodesIterator();
    Base::Vector3f pt2d;
    std::set<int> IntSet;

    for (int i=0;aNodeIter->more();) {
        const SMDS_MeshNode* aNode = aNodeIter->next();
        Base::Vector3f vec(aNode->X(),aNode->Y(),aNode->Z());
        pt2d = proj(vec);
        if (polygon.Contains(Base::Vector2D(pt2d.x, pt2d.y)) == true) 
            IntSet.insert(aNode->GetID());
    }
    
    std::stringstream  set;

    set << "[";
    for(std::set<int>::const_iterator it=IntSet.begin();it!=IntSet.end();++it)
        if(it==IntSet.begin())
            set << *it ;
        else
            set << "," << *it ;
    set << "]";

    
    Gui::Command::openCommand("Place robot");
    Gui::Command::doCommand(Gui::Command::Doc,"App.ActiveDocument.addObject('Fem::FemSetNodesObject','NodeSet')");
    Gui::Command::doCommand(Gui::Command::Doc,"App.ActiveDocument.ActiveObject.Nodes = %s",set.str().c_str());
    Gui::Command::doCommand(Gui::Command::Doc,"App.activeDocument().%s.Member = App.activeDocument().%s.Member + [App.activeDocument().NodeSet]",Analysis->getNameInDocument(),Analysis->getNameInDocument());
    ////Gui::Command::updateActive();
    Gui::Command::commitCommand();

    //std::vector<Gui::ViewProvider*> views = view->getViewProvidersOfType(ViewProviderMesh::getClassTypeId());
    //if (!views.empty()) {
    //    Gui::Application::Instance->activeDocument()->openCommand("Cut");
    //    for (std::vector<Gui::ViewProvider*>::iterator it = views.begin(); it != views.end(); ++it) {
    //        ViewProviderMesh* that = static_cast<ViewProviderMesh*>(*it);
    //        if (that->getEditingMode() > -1) {
    //            that->finishEditing();
    //            that->cutMesh(clPoly, *view, clip_inner);
    //        }
    //    }

    //    Gui::Application::Instance->activeDocument()->commitCommand();

    //    view->render();
    //}
}

void MeshSelection::selectGLCallback(void * ud, SoEventCallback * n)
{
    // When this callback function is invoked we must leave the edit mode
    Gui::View3DInventorViewer* view  = reinterpret_cast<Gui::View3DInventorViewer*>(n->getUserData());
    MeshSelection* self = reinterpret_cast<MeshSelection*>(ud);
    self->stopInteractiveCallback(view);
    n->setHandled();
    std::vector<SbVec2f> polygon = view->getGLPolygon();
    if (polygon.size() < 3)
        return;
    if (polygon.front() != polygon.back())
        polygon.push_back(polygon.front());

    SbVec3f pnt, dir;
    view->getNearPlane(pnt, dir);
    Base::Vector3f point (pnt[0],pnt[1],pnt[2]);
    Base::Vector3f normal(dir[0],dir[1],dir[2]);

    std::list<ViewProviderMesh*> views = self->getViewProviders();
    for (std::list<ViewProviderMesh*>::iterator it = views.begin(); it != views.end(); ++it) {
        ViewProviderMesh* vp = static_cast<ViewProviderMesh*>(*it);

        std::vector<unsigned long> faces;
        const Mesh::MeshObject& mesh = static_cast<Mesh::Feature*>((*it)->getObject())->Mesh.getValue();
        const MeshCore::MeshKernel& kernel = mesh.getKernel();

        // simply get all triangles under the polygon
        SoCamera* cam = view->getSoRenderManager()->getCamera();
        SbViewVolume vv = cam->getViewVolume();
        Gui::ViewVolumeProjection proj(vv);
        vp->getFacetsFromPolygon(polygon, proj, true, faces);
        if (self->onlyVisibleTriangles) {
            const SbVec2s& sz = view->getSoRenderManager()->getViewportRegion().getWindowSize();
            short width,height; sz.getValue(width,height);
            std::vector<SbVec2s> pixelPoly = view->getPolygon();
            SbBox2s rect;
            for (std::vector<SbVec2s>::iterator it = pixelPoly.begin(); it != pixelPoly.end(); ++it) {
                const SbVec2s& p = *it;
                rect.extendBy(SbVec2s(p[0],height-p[1]));
            }
            std::vector<unsigned long> rf; rf.swap(faces);
            std::vector<unsigned long> vf = vp->getVisibleFacetsAfterZoom
                (rect, view->getSoRenderManager()->getViewportRegion(), view->getSoRenderManager()->getCamera());

            // get common facets of the viewport and the visible one
            std::sort(vf.begin(), vf.end());
            std::sort(rf.begin(), rf.end());
            std::back_insert_iterator<std::vector<unsigned long> > biit(faces);
            std::set_intersection(vf.begin(), vf.end(), rf.begin(), rf.end(), biit);
        }

        // if set filter out all triangles which do not point into user direction
        if (self->onlyPointToUserTriangles) {
            std::vector<unsigned long> screen;
            screen.reserve(faces.size());
            MeshCore::MeshFacetIterator it_f(kernel);
            for (std::vector<unsigned long>::iterator it = faces.begin(); it != faces.end(); ++it) {
                it_f.Set(*it);
                if (it_f->GetNormal() * normal > 0.0f) {
                    screen.push_back(*it);
                }
            }

            faces.swap(screen);
        }

        if (self->addToSelection)
            vp->addSelection(faces);
        else
            vp->removeSelection(faces);
    }

    view->redraw();
}