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:

1. BooleanOperationPolyDataFilter - Computes the intersection of two spheres

2. BooleanOperationPolyDataFilter intersection|difference|union - Computes the intersection(difference or union) of two spheres

3. BooleanOperationPolyDataFilter input1.vtk intersection|difference|union input2.vtk - Computes the intersection(difference or union) of two vtkPolyData's

Seealso

LoopBooleanPolyDataFilter, it uses an alternative algorithm to do the boolean operations.

Other languages

See (Python)

Question

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 <vtkSphereSource.h>
#include <vtksys/SystemTools.hxx>

#include <vtkCamera.h>
namespace {
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)
{
vtkNew<vtkTriangleFilter> tri1;
tri1->SetInputData(poly1);
vtkNew<vtkCleanPolyData> clean1;
clean1->SetInputConnection(tri1->GetOutputPort());
clean1->Update();
input1 = clean1->GetOutput();

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->SetBackground(colors->GetColor3d("Silver").GetData());
vtkNew<vtkRenderWindow> renderWindow;
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> polyData;
std::string extension =
vtksys::SystemTools::GetFilenameExtension(std::string(fileName));
if (extension == ".ply")
{
}
else if (extension == ".vtp")
{
}
else if (extension == ".obj")
{
}
else if (extension == ".stl")
{
}
else if (extension == ".vtk")
{
}
else if (extension == ".g")
{
}
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 3.12 FATAL_ERROR)

project(BooleanOperationPolyDataFilter)

find_package(VTK COMPONENTS
CommonColor
CommonCore
FiltersCore
FiltersGeneral
IOGeometry
IOLegacy
IOPLY
IOXML
InteractionStyle
RenderingContextOpenGL2
RenderingCore
RenderingFreeType
RenderingGL2PSOpenGL2
RenderingOpenGL2
)

if (NOT VTK_FOUND)
message(FATAL_ERROR "BooleanOperationPolyDataFilter: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
target_link_libraries(BooleanOperationPolyDataFilter PRIVATE ${VTK_LIBRARIES} ) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS BooleanOperationPolyDataFilter MODULES${VTK_LIBRARIES}
)


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.