CombinePolyData
VTKExamples/Cxx/Filtering/CombinePolyData
Description¶
This example reads two .vtp files (or produces them if not specified as command line arguments), combines them, and displays the result to the screen.
Code¶
CombinePolyData.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkConeSource.h> #include <vtkXMLPolyDataReader.h> #include <vtkCleanPolyData.h> #include <vtkAppendPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int argc, char *argv[]) { vtkSmartPointer<vtkPolyData> input1 = vtkSmartPointer<vtkPolyData>::New(); vtkSmartPointer<vtkPolyData> input2 = vtkSmartPointer<vtkPolyData>::New(); if(argc == 1) //command line arguments not specified { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(5,0,0); sphereSource->Update(); input1->ShallowCopy(sphereSource->GetOutput()); vtkSmartPointer<vtkConeSource> coneSource = vtkSmartPointer<vtkConeSource>::New(); coneSource->Update(); input2->ShallowCopy(coneSource->GetOutput()); } else { if(argc != 3) { std::cout << "argc = " << argc << std::endl; std::cout << "Required arguments: File1 File2" << std::endl; return EXIT_FAILURE; } std::string inputFilename1 = argv[1]; std::string inputFilename2 = argv[2]; vtkSmartPointer<vtkXMLPolyDataReader> reader1 = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader1->SetFileName(inputFilename1.c_str()); reader1->Update(); input1->ShallowCopy(reader1->GetOutput()); vtkSmartPointer<vtkXMLPolyDataReader> reader2 = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader2->SetFileName(inputFilename2.c_str()); reader2->Update(); input2->ShallowCopy(reader2->GetOutput()); } //Append the two meshes vtkSmartPointer<vtkAppendPolyData> appendFilter = vtkSmartPointer<vtkAppendPolyData>::New(); #if VTK_MAJOR_VERSION <= 5 appendFilter->AddInputConnection(input1->GetProducerPort()); appendFilter->AddInputConnection(input2->GetProducerPort()); #else appendFilter->AddInputData(input1); appendFilter->AddInputData(input2); #endif appendFilter->Update(); // Remove any duplicate points. vtkSmartPointer<vtkCleanPolyData> cleanFilter = vtkSmartPointer<vtkCleanPolyData>::New(); cleanFilter->SetInputConnection(appendFilter->GetOutputPort()); cleanFilter->Update(); //Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(cleanFilter->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); //Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); //Add the actors to the scene renderer->AddActor(actor); renderer->SetBackground(.3, .2, .1); // Background color dark red //Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(CombinePolyData) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(CombinePolyData MACOSX_BUNDLE CombinePolyData.cxx) target_link_libraries(CombinePolyData ${VTK_LIBRARIES})
Download and Build CombinePolyData¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download CombinePolyData and its CMakeLists.txt file. Once the tarball CombinePolyData.tar has been downloaded and extracted,
cd CombinePolyData/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./CombinePolyData
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.