ScaleVertices
VTKExamples/Cxx/Graphs/ScaleVertices
Description¶
Scale the vertices based on a data array.
Other Languages
See (Python)
Question
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Code¶
ScaleVertices.cxx
#include <vtkSmartPointer.h> #include <vtkRenderedGraphRepresentation.h> #include <vtkFloatArray.h> #include <vtkMutableUndirectedGraph.h> #include <vtkGraphWriter.h> #include <vtkGraphLayoutView.h> #include <vtkRenderWindowInteractor.h> #include <vtkDataSetAttributes.h> #include <vtkGraphToGlyphs.h> int main(int, char *[]) { vtkSmartPointer<vtkMutableUndirectedGraph> g = vtkSmartPointer<vtkMutableUndirectedGraph>::New(); vtkIdType v1 = g->AddVertex(); vtkIdType v2 = g->AddVertex(); g->AddEdge(v1, v2); g->AddEdge(v1, v2); vtkSmartPointer<vtkFloatArray> scales = vtkSmartPointer<vtkFloatArray>::New(); scales->SetNumberOfComponents(1); scales->SetName("Scales"); scales->InsertNextValue(1.0); scales->InsertNextValue(4.0); g->GetVertexData()->AddArray(scales); vtkSmartPointer<vtkGraphLayoutView> layoutView = vtkSmartPointer<vtkGraphLayoutView>::New(); layoutView->AddRepresentationFromInput(g); layoutView->ScaledGlyphsOn(); layoutView->SetScalingArrayName("Scales"); dynamic_cast<vtkRenderedGraphRepresentation*>(layoutView->GetRepresentation()) ->SetGlyphType(vtkGraphToGlyphs::CIRCLE); layoutView->ResetCamera(); layoutView->Render(); layoutView->GetInteractor()->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(ScaleVertices) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkIOLegacy vtkInteractionStyle vtkRenderingContextOpenGL2 vtkRenderingCore vtkRenderingFreeType vtkRenderingGL2PSOpenGL2 vtkRenderingOpenGL2 vtkViewsInfovis QUIET) if (NOT VTK_FOUND) message("Skipping ScaleVertices: ${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(ScaleVertices MACOSX_BUNDLE ScaleVertices.cxx ) target_link_libraries(ScaleVertices PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ScaleVertices MACOSX_BUNDLE ScaleVertices.cxx ) target_link_libraries(ScaleVertices PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ScaleVertices MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ScaleVertices¶
Click here to download ScaleVertices and its CMakeLists.txt file. Once the tarball ScaleVertices.tar has been downloaded and extracted,
cd ScaleVertices/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:
./ScaleVertices
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.