PolyDataGetPoint
VTKExamples/Cxx/PolyData/PolyDataGetPoint
Description
This example demonstrates how to obtain the coordinates of a point in a vtkPolyData object.
- Suggested by Sara Rolfe
Code
PolyDataGetPoint.cxx
#include <vtkSphereSource.h>
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
int main(int, char*[])
{
// Create a sphere
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->Update();
vtkPolyData* polydata = sphereSource->GetOutput();
// Write all of the coordinates of the points in the vtkPolyData to the console.
for(vtkIdType i = 0; i < polydata->GetNumberOfPoints(); i++)
{
double p[3];
polydata->GetPoint(i,p);
// This is identical to:
// polydata->GetPoints()->GetPoint(i,p);
std::cout << "Point " << i << " : (" << p[0] << " " << p[1] << " " << p[2] << ")" << std::endl;
}
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(PolyDataGetPoint)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(PolyDataGetPoint MACOSX_BUNDLE PolyDataGetPoint.cxx)
target_link_libraries(PolyDataGetPoint ${VTK_LIBRARIES})
Download and Build PolyDataGetPoint
Click here to download PolyDataGetPoint and its CMakeLists.txt file. Once the tarball PolyDataGetPoint.tar has been downloaded and extracted,
cd PolyDataGetPoint/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:
./PolyDataGetPoint
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.