Triangle
VTKExamples/Cxx/GeometricObjects/Triangle
Code¶
Triangle.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkTriangle.h> #include <vtkCellArray.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int , char *[]) { // Create a triangle vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint ( 1.0, 0.0, 0.0 ); points->InsertNextPoint ( 0.0, 0.0, 0.0 ); points->InsertNextPoint ( 0.0, 1.0, 0.0 ); vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New(); triangle->GetPointIds()->SetId ( 0, 0 ); triangle->GetPointIds()->SetId ( 1, 1 ); triangle->GetPointIds()->SetId ( 2, 2 ); vtkSmartPointer<vtkCellArray> triangles = vtkSmartPointer<vtkCellArray>::New(); triangles->InsertNextCell ( triangle ); // Create a polydata object vtkSmartPointer<vtkPolyData> trianglePolyData = vtkSmartPointer<vtkPolyData>::New(); // Add the geometry and topology to the polydata trianglePolyData->SetPoints ( points ); trianglePolyData->SetPolys ( triangles ); // Create mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); #if VTK_MAJOR_VERSION <= 5 mapper->SetInput(trianglePolyData); #else mapper->SetInputData(trianglePolyData); #endif vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Create a renderer, render window, and an 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(.1, .2, .4); // Background color dark blue // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(Triangle) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(Triangle MACOSX_BUNDLE Triangle.cxx) target_link_libraries(Triangle ${VTK_LIBRARIES})
Download and Build Triangle¶
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 Triangle and its CMakeLists.txt file. Once the tarball Triangle.tar has been downloaded and extracted,
cd Triangle/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:
./Triangle
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.