ReverseSense
VTKExamples/Cxx/PolyData/ReverseSense
Code¶
ReverseSense.cxx
#include <vtkSmartPointer.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkPointData.h> #include <vtkReverseSense.h> #include <vtkFloatArray.h> int main(int, char *[]) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->Update(); vtkSmartPointer<vtkFloatArray> pointNormals = vtkFloatArray::SafeDownCast(sphereSource->GetOutput()->GetPointData()->GetNormals()); std::cout << std::endl << "Normals: " << std::endl; // Display the first few normals for(unsigned int i = 0; i < 5; i++) { double pN[3]; pointNormals->GetTuple(i, pN); std::cout << "Point normal " << i << ": " << pN[0] << " " << pN[1] << " " << pN[2] << std::endl; } vtkSmartPointer<vtkReverseSense> reverseSense = vtkSmartPointer<vtkReverseSense>::New(); reverseSense->SetInputConnection(sphereSource->GetOutputPort()); reverseSense->ReverseNormalsOn(); reverseSense->Update(); vtkSmartPointer<vtkFloatArray> reversedNormals = vtkFloatArray::SafeDownCast(reverseSense->GetOutput()->GetPointData()->GetNormals()); std::cout << std::endl << "Reversed: " << std::endl; // Display the first few normals to verify that they are flipped for(unsigned int i = 0; i < 5; i++) { double pN[3]; reversedNormals->GetTuple(i, pN); std::cout << "Reversed normal " << i << ": " << pN[0] << " " << pN[1] << " " << pN[2] << std::endl; } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ReverseSense) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ReverseSense MACOSX_BUNDLE ReverseSense.cxx) target_link_libraries(ReverseSense ${VTK_LIBRARIES})
Download and Build ReverseSense¶
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 Some tarballs may be missing or out-of-date.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 ReverseSense and its CMakeLists.txt file. Once the tarball ReverseSense.tar has been downloaded and extracted,
cd ReverseSense/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:
./ReverseSense
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.