通过指定cellid获取周围cellid信息，改变指定cellid的颜色

参考url：https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/CellEdgeNeighbors/

1.根据指定的cellid获取周围cellid信息

void getNeighborCellID(int cellid,vtkPolyData* polydata,QList<int>& neighbors){ vtkSmartPointer<vtkIdList> cellPointIds = vtkSmartPointer<vtkIdList>::New(); //根据cellID获取顶点索引信息 polydata->GetCellPoints(cellid, cellPointIds); for(vtkIdType i = 0; i < cellPointIds->GetNumberOfIds(); i++){ vtkSmartPointer<vtkIdList> idList = vtkSmartPointer<vtkIdList>::New(); idList->InsertNextId(cellPointIds->GetId(i)); //根据是否查找共享顶点或者共享边判断是否注销下面代码 //共享顶点注销 if(i+1 == cellPointIds->GetNumberOfIds()){ idList->InsertNextId(cellPointIds->GetId(0)); }else{ idList->InsertNextId(cellPointIds->GetId(i+1)); }//end vtkSmartPointer<vtkIdList> neighborCellIds = vtkSmartPointer<vtkIdList>::New(); polydata->GetCellNeighbors(cellid, idList, neighborCellIds); for(vtkIdType j = 0; j < neighborCellIds->GetNumberOfIds(); j++) { neighbors.push_back(neighborCellIds->GetId(j)); } } return; }

2.根据指定cellid改变颜色

void createSelectCellActor(vtkPolyData* polydata,QList<int>& selectCellId,vtkActor* selectActor){ if(polydata == NULL || selectActor == NULL){ return; } vtkSmartPointer<vtkIdTypeArray> ids = vtkSmartPointer<vtkIdTypeArray>::New(); ids->SetNumberOfComponents(1); for(int i=0;i<selectCellId.size();i++){ ids->InsertNextValue(selectCellId.at(i)); } vtkSmartPointer<vtkSelectionNode> selectionNode = vtkSmartPointer<vtkSelectionNode>::New(); selectionNode->SetFieldType(vtkSelectionNode::CELL); selectionNode->SetContentType(vtkSelectionNode::INDICES); selectionNode->SetSelectionList(ids); // invert the selection //selectionNode->GetProperties()->Set(vtkSelectionNode::INVERSE(),1); vtkSmartPointer<vtkSelection> selection = vtkSmartPointer<vtkSelection>::New(); selection->AddNode(selectionNode); vtkSmartPointer<vtkExtractSelection> extractSelection = vtkSmartPointer<vtkExtractSelection>::New(); extractSelection->SetInputData(0, polydata); extractSelection->SetInputData(1, selection); extractSelection->Update(); vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New(); mapper->SetInputConnection(extractSelection->GetOutputPort()); selectActor->SetMapper(mapper); return; }