SelectPolyData
VTKExamples/Cxx/PolyData/SelectPolyData
Code
SelectPolyData.cxx
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkSelectPolyData.h>
#include <vtkSphereSource.h>
#include <vtkClipPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkLODActor.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
int main(int, char *[])
{
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->Update();
vtkSmartPointer<vtkPoints> selectionPoints =
vtkSmartPointer<vtkPoints>::New();
selectionPoints->InsertPoint( 0, -0.16553, 0.135971, 0.451972 );
selectionPoints->InsertPoint( 1, -0.0880123, -0.134952, 0.4747);
selectionPoints->InsertPoint( 2, 0.00292618, -0.134604, 0.482459 );
selectionPoints->InsertPoint( 3, 0.0641941, 0.067112, 0.490947);
selectionPoints->InsertPoint( 4, 0.15577, 0.0734765, 0.469245);
selectionPoints->InsertPoint( 5, 0.166667, -0.129217, 0.454622 );
selectionPoints->InsertPoint( 6, 0.241259, -0.123363, 0.420581);
selectionPoints->InsertPoint( 7, 0.240334, 0.0727106, 0.432555);
selectionPoints->InsertPoint( 8, 0.308529, 0.0844311, 0.384357 );
selectionPoints->InsertPoint( 9, 0.32672, -0.121674, 0.359187);
selectionPoints-> InsertPoint( 10, 0.380721, -0.117342, 0.302527);
selectionPoints ->InsertPoint( 11, 0.387804, 0.0455074, 0.312375 );
selectionPoints ->InsertPoint( 12, 0.43943, -0.111673, 0.211707);
selectionPoints ->InsertPoint( 13, 0.470984, -0.0801913, 0.147919);
selectionPoints ->InsertPoint( 14, 0.436777, 0.0688872, 0.233021 );
selectionPoints ->InsertPoint( 15, 0.44874, 0.188852, 0.109882);
selectionPoints ->InsertPoint( 16, 0.391352, 0.254285, 0.176943);
selectionPoints ->InsertPoint( 17, 0.373274, 0.154162, 0.294296 );
selectionPoints ->InsertPoint( 18, 0.274659, 0.311654, 0.276609);
selectionPoints ->InsertPoint( 19, 0.206068, 0.31396, 0.329702);
selectionPoints ->InsertPoint( 20, 0.263789, 0.174982, 0.387308 );
selectionPoints ->InsertPoint( 21, 0.213034, 0.175485, 0.417142);
selectionPoints ->InsertPoint( 22, 0.169113, 0.261974, 0.390286);
selectionPoints ->InsertPoint( 23, 0.102552, 0.25997, 0.414814 );
selectionPoints ->InsertPoint( 24, 0.131512, 0.161254, 0.454705);
selectionPoints ->InsertPoint( 25, 0.000192443, 0.156264, 0.475307);
selectionPoints ->InsertPoint( 26, -0.0392091, 0.000251724, 0.499943);
selectionPoints ->InsertPoint( 27, -0.096161, 0.159646, 0.46438 );
vtkSmartPointer<vtkSelectPolyData> loop =
vtkSmartPointer<vtkSelectPolyData>::New();
loop->SetInputConnection(sphereSource->GetOutputPort());
loop->SetLoop(selectionPoints);
loop->GenerateSelectionScalarsOn();
loop->SetSelectionModeToSmallestRegion(); //negative scalars inside
vtkSmartPointer<vtkClipPolyData> clip = //clips out positive region
vtkSmartPointer<vtkClipPolyData>::New();
clip->SetInputConnection(loop->GetOutputPort());
vtkSmartPointer<vtkPolyDataMapper> clipMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
clipMapper->SetInputConnection(clip->GetOutputPort());
vtkSmartPointer<vtkLODActor> clipActor =
vtkSmartPointer<vtkLODActor>::New();
clipActor->SetMapper(clipMapper);
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(renderWindow);
// Add the actors to the renderer, set the background and size
renderer->AddActor (clipActor);
renderer->SetBackground (.1, .2, .4);
renderWindow->SetSize (500, 250);
renderWindow->Render();
interactor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(SelectPolyData)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(SelectPolyData MACOSX_BUNDLE SelectPolyData.cxx)
target_link_libraries(SelectPolyData ${VTK_LIBRARIES})
Download and Build SelectPolyData
Click here to download SelectPolyData and its CMakeLists.txt file. Once the tarball SelectPolyData.tar has been downloaded and extracted,
cd SelectPolyData/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:
./SelectPolyData
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.