CenterOfMass
VTKExamples/Cxx/PolyData/CenterOfMass
Code
CenterOfMass.cxx
#include <vtkVersion.h>
#include <vtkCenterOfMass.h>
#include <vtkDoubleArray.h>
#include <vtkPoints.h>
#include <vtkPointData.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <limits>
#include <cmath>
int main(int, char*[])
{
// Create a point set of a square
vtkSmartPointer<vtkPoints> points =
vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint(0,0,0);
points->InsertNextPoint(1,0,0);
points->InsertNextPoint(0,1,0);
points->InsertNextPoint(1,1,0);
vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
polydata->SetPoints(points);
// Compute the center of mass
vtkSmartPointer<vtkCenterOfMass> centerOfMassFilter =
vtkSmartPointer<vtkCenterOfMass>::New();
#if VTK_MAJOR_VERSION <= 5
centerOfMassFilter->SetInput(polydata);
#else
centerOfMassFilter->SetInputData(polydata);
#endif
centerOfMassFilter->SetUseScalarsAsWeights(false);
centerOfMassFilter->Update();
double center[3];
centerOfMassFilter->GetCenter(center);
std::cout << "Center of mass is " << center[0] << " " << center[1] << " " << center[2] << std::endl;
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(CenterOfMass)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(CenterOfMass MACOSX_BUNDLE CenterOfMass.cxx)
target_link_libraries(CenterOfMass ${VTK_LIBRARIES})
Download and Build CenterOfMass
Click here to download CenterOfMass and its CMakeLists.txt file. Once the tarball CenterOfMass.tar has been downloaded and extracted,
cd CenterOfMass/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:
./CenterOfMass
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.