TriangleStrip
VTKExamples/Cxx/GeometricObjects/TriangleStrip
Description¶
A triangle strip is a compact representation of a series of triangles. See this wikipedia article for an explanation.
Code¶
TriangleStrip.cxx
#include <vtkVersion.h> #include <vtkActor.h> #include <vtkCellArray.h> #include <vtkDataSetMapper.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkProperty.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkTriangleStrip.h> int main(int, char *[]) { vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(0,0,0); points->InsertNextPoint(0,1,0); points->InsertNextPoint(1,0,0); points->InsertNextPoint(1.5,1,0); vtkSmartPointer<vtkTriangleStrip> triangleStrip = vtkSmartPointer<vtkTriangleStrip>::New(); triangleStrip->GetPointIds()->SetNumberOfIds(4); triangleStrip->GetPointIds()->SetId(0,0); triangleStrip->GetPointIds()->SetId(1,1); triangleStrip->GetPointIds()->SetId(2,2); triangleStrip->GetPointIds()->SetId(3,3); vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New(); cells->InsertNextCell(triangleStrip); vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); polydata->SetPoints(points); polydata->SetStrips(cells); // Create an actor and mapper vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New(); #if VTK_MAJOR_VERSION <= 5 mapper->SetInput(polydata); #else mapper->SetInputData(polydata); #endif vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); actor->GetProperty()->SetRepresentationToWireframe(); // 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); renderer->AddActor(actor); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(TriangleStrip) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(TriangleStrip MACOSX_BUNDLE TriangleStrip.cxx) target_link_libraries(TriangleStrip ${VTK_LIBRARIES})
Download and Build TriangleStrip¶
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 TriangleStrip and its CMakeLists.txt file. Once the tarball TriangleStrip.tar has been downloaded and extracted,
cd TriangleStrip/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:
./TriangleStrip
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.