LongLine
VTKExamples/Cxx/GeometricObjects/LongLine
Description¶
Connect several points with a line.
Seealso
Code¶
LongLine.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkCellArray.h> #include <vtkCellData.h> #include <vtkDoubleArray.h> #include <vtkPoints.h> #include <vtkLine.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { // Create five points. double origin[3] = {0.0, 0.0, 0.0}; double p0[3] = {1.0, 0.0, 0.0}; double p1[3] = {0.0, 1.0, 0.0}; double p2[3] = {0.0, 1.0, 2.0}; double p3[3] = {1.0, 2.0, 3.0}; // Create a vtkPoints object and store the points in it vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(origin); points->InsertNextPoint(p0); points->InsertNextPoint(p1); points->InsertNextPoint(p2); points->InsertNextPoint(p3); // Create a cell array to store the lines in and add the lines to it vtkSmartPointer<vtkCellArray> lines = vtkSmartPointer<vtkCellArray>::New(); for(unsigned int i = 0; i < 3; i++) { vtkSmartPointer<vtkLine> line = vtkSmartPointer<vtkLine>::New(); line->GetPointIds()->SetId(0,i); line->GetPointIds()->SetId(1,i+1); lines->InsertNextCell(line); } // Create a polydata to store everything in vtkSmartPointer<vtkPolyData> linesPolyData = vtkSmartPointer<vtkPolyData>::New(); // Add the points to the dataset linesPolyData->SetPoints(points); // Add the lines to the dataset linesPolyData->SetLines(lines); // Setup actor and mapper vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); #if VTK_MAJOR_VERSION <= 5 mapper->SetInput(linesPolyData); #else mapper->SetInputData(linesPolyData); #endif vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Setup render window, renderer, 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(LongLine) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(LongLine MACOSX_BUNDLE LongLine.cxx) target_link_libraries(LongLine ${VTK_LIBRARIES})
Download and Build LongLine¶
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 LongLine and its CMakeLists.txt file. Once the tarball LongLine.tar has been downloaded and extracted,
cd LongLine/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:
./LongLine
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.