Spring
VTKExamples/Cxx/Modelling/Spring
Code¶
Spring.cxx
#include <vtkActor.h> #include <vtkCamera.h> #include <vtkCellArray.h> #include <vtkNamedColors.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkPolyDataNormals.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkRotationalExtrusionFilter.h> int main (int, char *[]) { vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New(); // Create the RenderWindow, Renderer and both Actors // vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); // create spring profile (a circle) // vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertPoint(0, 1.0, 0.0, 0.0); points->InsertPoint(1, 1.0732, 0.0, -0.1768); points->InsertPoint(2, 1.25, 0.0, -0.25); points->InsertPoint(3, 1.4268, 0.0, -0.1768); points->InsertPoint(4, 1.5, 0.0, 0.00); points->InsertPoint(5, 1.4268, 0.0, 0.1768); points->InsertPoint(6, 1.25, 0.0, 0.25); points->InsertPoint(7, 1.0732, 0.0, 0.1768); vtkSmartPointer<vtkCellArray> poly = vtkSmartPointer<vtkCellArray>::New(); poly->InsertNextCell(8);//number of points poly->InsertCellPoint(0); poly->InsertCellPoint(1); poly->InsertCellPoint(2); poly->InsertCellPoint(3); poly->InsertCellPoint(4); poly->InsertCellPoint(5); poly->InsertCellPoint(6); poly->InsertCellPoint(7); vtkSmartPointer<vtkPolyData> profile = vtkSmartPointer<vtkPolyData>::New(); profile->SetPoints(points); profile->SetPolys(poly); // extrude profile to make spring // vtkSmartPointer<vtkRotationalExtrusionFilter> extrude = vtkSmartPointer<vtkRotationalExtrusionFilter>::New(); extrude->SetInputData(profile); extrude->SetResolution(360); extrude->SetTranslation(6); extrude->SetDeltaRadius(1.0); extrude->SetAngle(2160.0);//six revolutions vtkSmartPointer<vtkPolyDataNormals> normals = vtkSmartPointer<vtkPolyDataNormals>::New(); normals->SetInputConnection(extrude->GetOutputPort()); normals->SetFeatureAngle(60); vtkSmartPointer<vtkPolyDataMapper> map = vtkSmartPointer<vtkPolyDataMapper>::New(); map->SetInputConnection(normals->GetOutputPort()); vtkSmartPointer<vtkActor> spring = vtkSmartPointer<vtkActor>::New(); spring->SetMapper(map); spring->GetProperty()->SetColor(colors->GetColor3d("PowderBlue").GetData()); spring->GetProperty()->SetDiffuse(0.7); spring->GetProperty()->SetSpecular(0.4); spring->GetProperty()->SetSpecularPower(20); spring->GetProperty()->BackfaceCullingOn(); // Add the actors to the renderer, set the background and size // renderer->AddActor(spring); renderer->SetBackground(colors->GetColor3d("Burlywood").GetData()); renderWindow->SetSize(640, 512); renderer->ResetCamera(); renderer->GetActiveCamera()->Azimuth(90); renderWindow->Render(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(Spring) find_package(VTK COMPONENTS vtkCommonColor vtkCommonCore vtkCommonDataModel vtkFiltersCore vtkFiltersModeling vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping Spring: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(Spring MACOSX_BUNDLE Spring.cxx ) target_link_libraries(Spring PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(Spring MACOSX_BUNDLE Spring.cxx ) target_link_libraries(Spring PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS Spring MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build Spring¶
Click here to download Spring and its CMakeLists.txt file. Once the tarball Spring.tar has been downloaded and extracted,
cd Spring/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:
./Spring
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.