PolyDataGetPoint
vtk-examples/Cxx/PolyData/PolyDataGetPoint
Description¶
This example demonstrates how to obtain the coordinates of a point in a vtkPolyData object.
- Suggested by Sara Rolfe
Other languages
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Question
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Code¶
PolyDataGetPoint.cxx
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkSphereSource.h>
int main(int, char*[])
{
// Create a sphere
vtkNew<vtkSphereSource> sphereSource;
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 3.3 FATAL_ERROR)
project(PolyDataGetPoint)
find_package(VTK COMPONENTS
vtkCommonCore
vtkCommonDataModel
vtkFiltersSources
QUIET
)
if (NOT VTK_FOUND)
message("Skipping PolyDataGetPoint: ${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(PolyDataGetPoint MACOSX_BUNDLE PolyDataGetPoint.cxx )
target_link_libraries(PolyDataGetPoint PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(PolyDataGetPoint MACOSX_BUNDLE PolyDataGetPoint.cxx )
target_link_libraries(PolyDataGetPoint PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS PolyDataGetPoint
MODULES ${VTK_LIBRARIES}
)
endif ()
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
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.