BooleanOperationPolyDataFilter
vtk-examples/Cxx/PolyData/BooleanOperationPolyDataFilter
Description¶
The vtkBooleanOperationPolyDataFilter works best with "clean" data, so this examples first runs vtkTriangleFilter and then vtkCleanPolyData.
This example can be run in three ways:
-
BooleanOperationPolyDataFilter - Computes the intersection of two spheres
-
BooleanOperationPolyDataFilter intersection|difference|union - Computes the intersection(difference or union) of two spheres
-
BooleanOperationPolyDataFilter input1.vtk intersection|difference|union input2.vtk - Computes the intersection(difference or union) of two vtkPolyData's
Cite
See Boolean Operations on Surfaces in VTK Without External Libraries for details on the algorithm.
Seealso
LoopBooleanPolyDataFilter, it uses an alternative algorithm to do the boolean operations.
Other languages
See (Python)
Question
If you have a question about this example, please use the VTK Discourse Forum
Code¶
BooleanOperationPolyDataFilter.cxx
#include <vtkActor.h>
#include <vtkBooleanOperationPolyDataFilter.h>
#include <vtkCleanPolyData.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSmartPointer.h>
#include <vtkTriangleFilter.h>
#include <vtkBYUReader.h>
#include <vtkOBJReader.h>
#include <vtkPLYReader.h>
#include <vtkPolyDataReader.h>
#include <vtkSTLReader.h>
#include <vtkXMLPolyDataReader.h>
#include <vtkSphereSource.h>
#include <vtksys/SystemTools.hxx>
#include <vtkCamera.h>
namespace {
vtkSmartPointer<vtkPolyData> ReadPolyData(const char* fileName);
void PositionCamera(vtkRenderer* renderer, double* viewUp, double* position);
} // namespace
int main(int argc, char* argv[])
{
vtkSmartPointer<vtkPolyData> input1;
vtkSmartPointer<vtkPolyData> input2;
std::string operation("intersection");
if (argc == 4)
{
auto poly1 = ReadPolyData(argv[1]);
vtkNew<vtkTriangleFilter> tri1;
tri1->SetInputData(poly1);
vtkNew<vtkCleanPolyData> clean1;
clean1->SetInputConnection(tri1->GetOutputPort());
clean1->Update();
input1 = clean1->GetOutput();
auto poly2 = ReadPolyData(argv[3]);
vtkNew<vtkTriangleFilter> tri2;
tri2->SetInputData(poly2);
tri2->Update();
vtkNew<vtkCleanPolyData> clean2;
clean2->SetInputConnection(tri2->GetOutputPort());
clean2->Update();
input2 = clean2->GetOutput();
operation = argv[2];
}
else
{
vtkNew<vtkSphereSource> sphereSource1;
sphereSource1->SetCenter(0.25, 0, 0);
sphereSource1->SetPhiResolution(21);
sphereSource1->SetThetaResolution(21);
sphereSource1->Update();
input1 = sphereSource1->GetOutput();
vtkNew<vtkSphereSource> sphereSource2;
sphereSource2->Update();
input2 = sphereSource2->GetOutput();
if (argc == 2)
{
operation = argv[1];
}
}
vtkNew<vtkNamedColors> colors;
vtkNew<vtkPolyDataMapper> input1Mapper;
input1Mapper->SetInputData(input1);
input1Mapper->ScalarVisibilityOff();
vtkNew<vtkActor> input1Actor;
input1Actor->SetMapper(input1Mapper);
input1Actor->GetProperty()->SetDiffuseColor(
colors->GetColor3d("Tomato").GetData());
input1Actor->GetProperty()->SetSpecular(0.6);
input1Actor->GetProperty()->SetSpecularPower(20);
input1Actor->SetPosition(input1->GetBounds()[1] - input1->GetBounds()[0], 0,
0);
vtkNew<vtkPolyDataMapper> input2Mapper;
input2Mapper->SetInputData(input2);
input2Mapper->ScalarVisibilityOff();
vtkNew<vtkActor> input2Actor;
input2Actor->SetMapper(input2Mapper);
input2Actor->GetProperty()->SetDiffuseColor(
colors->GetColor3d("Mint").GetData());
input2Actor->GetProperty()->SetSpecular(0.6);
input2Actor->GetProperty()->SetSpecularPower(20);
input2Actor->SetPosition(-(input1->GetBounds()[1] - input1->GetBounds()[0]),
0, 0);
vtkNew<vtkBooleanOperationPolyDataFilter> booleanOperation;
if (operation == "union")
{
booleanOperation->SetOperationToUnion();
}
else if (operation == "intersection")
{
booleanOperation->SetOperationToIntersection();
}
else if (operation == "difference")
{
booleanOperation->SetOperationToDifference();
}
else
{
std::cout << "Unknown operation: " << operation << std::endl;
return EXIT_FAILURE;
}
booleanOperation->SetInputData(0, input1);
booleanOperation->SetInputData(1, input2);
vtkNew<vtkPolyDataMapper> booleanOperationMapper;
booleanOperationMapper->SetInputConnection(booleanOperation->GetOutputPort());
booleanOperationMapper->ScalarVisibilityOff();
vtkNew<vtkActor> booleanOperationActor;
booleanOperationActor->SetMapper(booleanOperationMapper);
booleanOperationActor->GetProperty()->SetDiffuseColor(
colors->GetColor3d("Banana").GetData());
booleanOperationActor->GetProperty()->SetSpecular(.6);
booleanOperationActor->GetProperty()->SetSpecularPower(20);
vtkNew<vtkRenderer> renderer;
renderer->AddViewProp(input1Actor);
renderer->AddViewProp(input2Actor);
renderer->AddViewProp(booleanOperationActor);
renderer->SetBackground(colors->GetColor3d("Silver").GetData());
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetSize(640, 480);
renderWindow->SetWindowName("BooleanOperationPolyDataFilter");
double viewUp[3] = {0.0, 0.0, 1.0};
double position[3] = {0.0, -1.0, 0.0};
PositionCamera(renderer, viewUp, position);
renderer->GetActiveCamera()->Dolly(1.4);
renderer->ResetCameraClippingRange();
vtkNew<vtkRenderWindowInteractor> renWinInteractor;
renWinInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renWinInteractor->Start();
return EXIT_SUCCESS;
}
namespace {
vtkSmartPointer<vtkPolyData> ReadPolyData(const char* fileName)
{
vtkSmartPointer<vtkPolyData> polyData;
std::string extension =
vtksys::SystemTools::GetFilenameExtension(std::string(fileName));
if (extension == ".ply")
{
vtkNew<vtkPLYReader> reader;
reader->SetFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else if (extension == ".vtp")
{
vtkNew<vtkXMLPolyDataReader> reader;
reader->SetFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else if (extension == ".obj")
{
vtkNew<vtkOBJReader> reader;
reader->SetFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else if (extension == ".stl")
{
vtkNew<vtkSTLReader> reader;
reader->SetFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else if (extension == ".vtk")
{
vtkNew<vtkPolyDataReader> reader;
reader->SetFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else if (extension == ".g")
{
vtkNew<vtkBYUReader> reader;
reader->SetGeometryFileName(fileName);
reader->Update();
polyData = reader->GetOutput();
}
else
{
vtkNew<vtkSphereSource> source;
source->Update();
polyData = source->GetOutput();
}
return polyData;
}
void PositionCamera(vtkRenderer* renderer, double* viewUp, double* position)
{
renderer->GetActiveCamera()->SetFocalPoint(0.0, 0.0, 0.0);
renderer->GetActiveCamera()->SetViewUp(viewUp);
renderer->GetActiveCamera()->SetPosition(position);
renderer->ResetCamera();
return;
}
} // namespace
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(BooleanOperationPolyDataFilter)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkFiltersCore
vtkFiltersGeneral
vtkFiltersSources
vtkIOGeometry
vtkIOLegacy
vtkIOPLY
vtkIOXML
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping BooleanOperationPolyDataFilter: ${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(BooleanOperationPolyDataFilter MACOSX_BUNDLE BooleanOperationPolyDataFilter.cxx )
target_link_libraries(BooleanOperationPolyDataFilter PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(BooleanOperationPolyDataFilter MACOSX_BUNDLE BooleanOperationPolyDataFilter.cxx )
target_link_libraries(BooleanOperationPolyDataFilter PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS BooleanOperationPolyDataFilter
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build BooleanOperationPolyDataFilter¶
Click here to download BooleanOperationPolyDataFilter and its CMakeLists.txt file. Once the tarball BooleanOperationPolyDataFilter.tar has been downloaded and extracted,
cd BooleanOperationPolyDataFilter/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:
./BooleanOperationPolyDataFilter
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.