ScaleVertices
VTKExamples/Cxx/Graphs/ScaleVertices
Description
Scale the vertices based on a data array.
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");
vtkRenderedGraphRepresentation::SafeDownCast(layoutView->GetRepresentation())
->SetGlyphType(vtkGraphToGlyphs::CIRCLE);
layoutView->ResetCamera();
layoutView->Render();
layoutView->GetInteractor()->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ScaleVertices)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ScaleVertices MACOSX_BUNDLE ScaleVertices.cxx)
target_link_libraries(ScaleVertices ${VTK_LIBRARIES})
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 PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.