I want to cut the cone by two planes to remove the right-top part just as the following image.

Rewrite vtkClipPolyData

We can add multible clip functions for vtkClipPolyData to make it works.

#include <iostream>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkPolyDataMapper.h>
#include <vtkPlaneCollection.h>
#include <vtkClipClosedSurface.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkClipPolyData.h>
#include <vtkImplicitBoolean.h>
#include <vtkPlanes.h>
#include <vtkDataArray.h>
#include <vtkDoubleArray.h>
#include <vtkProperty.h>
#include <vtkPolyLine.h>

#include "multiClipPolyData.h"
#include "point.hpp"
#include "PolydataMethods.h"

using namespace std;

#define vtkSPtr vtkSmartPointer
#define vtkSPtrNew(Var, Type) vtkSPtr<Type> Var = vtkSPtr<Type>::New();

int main()
{
    vtkSPtrNew( cone, vtkConeSource );
    cone->Update();

    vtkSPtrNew( originData, vtkPolyData );
    originData->DeepCopy( cone->GetOutput() );

    CPolydataMethods::IncreaseDensity( originData, 0.1 );

    vtkSPtrNew( cutPlane0, vtkPlane );
    cutPlane0->SetOrigin( 0, 0, 0 );
    cutPlane0->SetNormal( -1, 0, 0 );
    vtkSPtrNew( cutPlane1, vtkPlane );
    cutPlane1->SetOrigin( 0, 0, 0 );
    cutPlane1->SetNormal( 0, -1, 0 );

    vtkSPtrNew( clipper, multiClipPolyData );
    clipper->SetInputData( originData );
    clipper->AddClipFunction( cutPlane0 );
    clipper->AddClipFunction( cutPlane1 );
    clipper->Update();

    vtkSPtrNew( mapper, vtkPolyDataMapper );
    mapper->SetInputConnection( clipper->GetOutputPort() );

    vtkSPtrNew( actor, vtkActor );
    actor->SetMapper( mapper );

    vtkSPtrNew( mapper0, vtkPolyDataMapper );
    mapper0->SetInputData( originData );

    vtkSPtrNew( actor0, vtkActor );
    actor0->SetMapper( mapper0 );
    actor0->GetProperty()->SetColor( 1, 0, 1 );

    vtkSPtrNew( renderer, vtkRenderer );
    renderer->AddActor(actor);
    //renderer->AddActor(actor0);
    renderer->SetBackground( 0, 0, 0 );

    vtkSPtrNew( renderWindow, vtkRenderWindow );
    renderWindow->AddRenderer( renderer );

    vtkSPtrNew( renderWindowInteractor, vtkRenderWindowInteractor );
    renderWindowInteractor->SetRenderWindow( renderWindow );

    renderer->ResetCamera();
    renderWindow->Render();
    renderWindowInteractor->Start();
    return 0;
}

The files about the class multiClipPolyData had been push to GitHub, cut mesh by multiple planes.

Use vtkPlanes

#include <iostream>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkPolyDataMapper.h>
#include <vtkPlaneCollection.h>
#include <vtkClipClosedSurface.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkClipPolyData.h>
#include <vtkImplicitBoolean.h>
#include <vtkPlanes.h>
#include <vtkDataArray.h>
#include <vtkDoubleArray.h>
#include <vtkProperty.h>
#include <vtkPolyLine.h>

#include "multiClipPolyData.h"
#include "point.hpp"
#include "PolydataMethods.h"

using namespace std;

#define vtkSPtr vtkSmartPointer
#define vtkSPtrNew(Var, Type) vtkSPtr<Type> Var = vtkSPtr<Type>::New();

int main()
{
    vtkSPtrNew( cone, vtkConeSource );
    cone->Update();

    vtkSPtrNew( originData, vtkPolyData );
    originData->DeepCopy( cone->GetOutput() );

    CPolydataMethods::IncreaseDensity( originData, 0.1 );

    vtkSPtrNew( cutPlanes, vtkPlanes );
    vtkSPtrNew( cutPts, vtkPoints );
    cutPts->InsertNextPoint( 0, 0, 0 ); // set origin of cut plane
    cutPts->InsertNextPoint( 0.5, 0, 0 );

    vtkSPtrNew( normals, vtkDoubleArray );
    normals->SetNumberOfComponents( 3 );
    normals->InsertTuple3( 0, -1, 0, 0 ); // set normal of cut plane
    normals->InsertTuple3( 1, 0, -1, 0 );
    cutPlanes->SetPoints( cutPts );
    cutPlanes->SetNormals( normals );

    vtkSPtrNew( clipper, vtkClipPolyData );
    clipper->SetInputData( originData );
    clipper->SetClipFunction( cutPlanes );
    clipper->Update();

    vtkSPtrNew( mapper, vtkPolyDataMapper );
    mapper->SetInputConnection( clipper->GetOutputPort() );

    vtkSPtrNew( actor, vtkActor );
    actor->SetMapper( mapper );

    vtkSPtrNew( mapper0, vtkPolyDataMapper );
    mapper0->SetInputData( originData );

    vtkSPtrNew( actor0, vtkActor );
    actor0->SetMapper( mapper0 );
    actor0->GetProperty()->SetColor( 1, 0, 1 );

    vtkSPtrNew( renderer, vtkRenderer );
    renderer->AddActor(actor);
    //renderer->AddActor(actor0);
    renderer->SetBackground( 0, 0, 0 );

    vtkSPtrNew( renderWindow, vtkRenderWindow );
    renderWindow->AddRenderer( renderer );

    vtkSPtrNew( renderWindowInteractor, vtkRenderWindowInteractor );
    renderWindowInteractor->SetRenderWindow( renderWindow );

    renderer->ResetCamera();
    renderWindow->Render();
    renderWindowInteractor->Start();
    return 0;
}

Use vtkImplicitBoolean

#include <iostream>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkPolyDataMapper.h>
#include <vtkPlaneCollection.h>
#include <vtkClipClosedSurface.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkClipPolyData.h>
#include <vtkImplicitBoolean.h>
#include <vtkPlanes.h>
#include <vtkDataArray.h>
#include <vtkDoubleArray.h>
#include <vtkProperty.h>
#include <vtkPolyLine.h>
#include <vtkImplicitBoolean.h>

#include "multiClipPolyData.h"
#include "point.hpp"
#include "PolydataMethods.h"

using namespace std;

#define vtkSPtr vtkSmartPointer
#define vtkSPtrNew(Var, Type) vtkSPtr<Type> Var = vtkSPtr<Type>::New();

int main()
{
    vtkSPtrNew( cone, vtkConeSource );
    cone->Update();

    vtkSPtrNew( originData, vtkPolyData );
    originData->DeepCopy( cone->GetOutput() );

    CPolydataMethods::IncreaseDensity( originData, 0.1 );

    vtkSPtrNew( cutPlane0, vtkPlane );
    cutPlane0->SetNormal( -1, 0, 0 );
    cutPlane0->SetOrigin( 0, 0, 0 );

    vtkSPtrNew( cutPlane1, vtkPlane );
    cutPlane1->SetNormal( 0, -1, 0 );
    cutPlane1->SetOrigin( 0.5, 0, 0 );

    vtkSPtrNew( boolean, vtkImplicitBoolean );
    boolean->AddFunction( cutPlane0 );
    boolean->AddFunction( cutPlane1 );
    //boolean->SetOperationTypeToUnion();
    //boolean->SetOperationTypeToUnionOfMagnitudes();
    boolean->SetOperationTypeToIntersection();

    vtkSPtrNew( clipper, vtkClipPolyData );
    clipper->SetInputData( originData );
    clipper->SetClipFunction( boolean );
    clipper->Update();

    vtkSPtrNew( mapper, vtkPolyDataMapper );
    mapper->SetInputConnection( clipper->GetOutputPort() );

    vtkSPtrNew( actor, vtkActor );
    actor->SetMapper( mapper );

    vtkSPtrNew( mapper0, vtkPolyDataMapper );
    mapper0->SetInputData( originData );

    vtkSPtrNew( actor0, vtkActor );
    actor0->SetMapper( mapper0 );
    actor0->GetProperty()->SetColor( 1, 0, 1 );

    vtkSPtrNew( renderer, vtkRenderer );
    renderer->AddActor(actor);
    //renderer->AddActor(actor0);
    renderer->SetBackground( 0, 0, 0 );

    vtkSPtrNew( renderWindow, vtkRenderWindow );
    renderWindow->AddRenderer( renderer );

    vtkSPtrNew( renderWindowInteractor, vtkRenderWindowInteractor );
    renderWindowInteractor->SetRenderWindow( renderWindow );

    renderer->ResetCamera();
    renderWindow->Render();
    renderWindowInteractor->Start();
    return 0;
}
Categories: VTK

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3D Model Viewer: add grid plane and convex hull.
Add google translate tool at right-bottom position.

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