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¶
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 Some tarballs may be missing or out-of-date.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 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.