AddCell
vtk-examples/Cxx/Meshes/AddCell
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Question
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Code¶
AddCell.cxx
#include <vtkCellArray.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkTriangle.h>
int main(int, char*[])
{
// Create a triangle
vtkNew<vtkPoints> points;
points->InsertNextPoint(1.0, 0.0, 0.0);
points->InsertNextPoint(0.0, 0.0, 0.0);
points->InsertNextPoint(0.0, 1.0, 0.0);
vtkNew<vtkTriangle> triangle;
triangle->GetPointIds()->SetId(0, 0);
triangle->GetPointIds()->SetId(1, 1);
triangle->GetPointIds()->SetId(2, 2);
vtkNew<vtkCellArray> triangles;
triangles->InsertNextCell(triangle);
// Create a polydata object
vtkNew<vtkPolyData> polyData;
// Add the geometry and topology to the polydata
polyData->SetPoints(points);
polyData->SetPolys(triangles);
std::cout << "There are " << polyData->GetNumberOfCells() << " cells."
<< std::endl;
polyData->GetPolys()->InsertNextCell(triangle);
std::cout << "There are " << polyData->GetNumberOfCells() << " cells."
<< std::endl;
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(AddCell)
find_package(VTK COMPONENTS
vtkCommonCore
vtkCommonDataModel
QUIET
)
if (NOT VTK_FOUND)
message("Skipping AddCell: ${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(AddCell MACOSX_BUNDLE AddCell.cxx )
target_link_libraries(AddCell PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(AddCell MACOSX_BUNDLE AddCell.cxx )
target_link_libraries(AddCell PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS AddCell
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build AddCell¶
Click here to download AddCell and its CMakeLists.txt file. Once the tarball AddCell.tar has been downloaded and extracted,
cd AddCell/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:
./AddCell
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.