NullPoint
VTKExamples/Cxx/PolyData/NullPoint
Code¶
NullPoint.cxx
#include <vtkPoints.h> #include <vtkPointData.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkFloatArray.h> int main(int, char *[]) { vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(1,1,1); points->InsertNextPoint(2,2,2); points->InsertNextPoint(3,3,3); vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); polydata->SetPoints(points); vtkSmartPointer<vtkFloatArray> floatArray = vtkSmartPointer<vtkFloatArray>::New(); floatArray->SetNumberOfValues(3); floatArray->SetNumberOfComponents(1); floatArray->SetName("FloatArray"); for(vtkIdType i = 0; i < 3; i++) { floatArray->SetValue(i,2); } polydata->GetPointData()->AddArray(floatArray); vtkSmartPointer<vtkIntArray> intArray = vtkSmartPointer<vtkIntArray>::New(); intArray->SetNumberOfValues(3); intArray->SetNumberOfComponents(1); intArray->SetName("IntArray"); for(vtkIdType i = 0; i < 3; i++) { intArray->SetValue(i,2); } polydata->GetPointData()->AddArray(intArray); for(vtkIdType i = 0; i < 3; i++) { double p[3]; polydata->GetPoint(i,p); vtkFloatArray* pointsFloatArray = vtkFloatArray::SafeDownCast(polydata->GetPointData()->GetArray("FloatArray")); vtkIntArray* pointsIntArray = vtkIntArray::SafeDownCast(polydata->GetPointData()->GetArray("IntArray")); std::cout << "Point " << i << " : " << p[0] << " " << p[1] << " " << p[2] << " " << pointsFloatArray->GetValue(i) << " " << pointsIntArray->GetValue(i) << std::endl; } polydata->GetPointData()->NullPoint(1); polydata->Modified(); for(vtkIdType i = 0; i < 3; i++) { double p[3]; polydata->GetPoint(i,p); vtkFloatArray* pointsFloatArray = vtkFloatArray::SafeDownCast(polydata->GetPointData()->GetArray("FloatArray")); vtkIntArray* pointsIntArray = vtkIntArray::SafeDownCast(polydata->GetPointData()->GetArray("IntArray")); std::cout << "Point " << i << " : " << p[0] << " " << p[1] << " " << p[2] << " " << pointsFloatArray->GetValue(i) << " " << pointsIntArray->GetValue(i) << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(NullPoint) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(NullPoint MACOSX_BUNDLE NullPoint.cxx) target_link_libraries(NullPoint ${VTK_LIBRARIES})
Download and Build NullPoint¶
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 Some tarballs may be missing or out-of-date.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 NullPoint and its CMakeLists.txt file. Once the tarball NullPoint.tar has been downloaded and extracted,
cd NullPoint/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:
./NullPoint
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.