【VTK】绘制Bounding Box

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参考文章【vtk】some-press-key-operations-for-default-renderwindowiterator ，我们可以通过按下w切换到wireframe mode，按下s键切换到surfaces mode.

但是这并不是我们要求的bounding box，要画出bounding box，可以这样：

#include <iostream>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>
#include <vtkActor.h>
#include <vtkConeSource.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkLight.h>
#include <vtkCamera.h>
#include <vtkActor2D.h>
#include <vtkOutlineFilter.h>
#include <vtkPolyDataNormals.h>

using namespace std;

int main()
{
    vtkSmartPointer<vtkConeSource> cone =
            vtkSmartPointer<vtkConeSource>::New();

    vtkSmartPointer<vtkPolyDataMapper> mapper =
            vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection( cone->GetOutputPort() );

    vtkSmartPointer<vtkActor> actor =
            vtkSmartPointer<vtkActor>::New();
    actor->SetMapper( mapper );

    // --------------------- start to draw bounding box ------------------------
    vtkSmartPointer<vtkPolyDataNormals> normals =
            vtkSmartPointer<vtkPolyDataNormals>::New();
    normals->SetInputConnection( cone->GetOutputPort() );

    vtkSmartPointer<vtkOutlineFilter> outlineFilter =
            vtkSmartPointer<vtkOutlineFilter>::New();
    outlineFilter->SetInputConnection( normals->GetOutputPort() );

    vtkSmartPointer<vtkPolyDataMapper> outLinemapper =
            vtkSmartPointer<vtkPolyDataMapper>::New();
    outLinemapper->SetInputConnection( outlineFilter->GetOutputPort() );

    vtkSmartPointer<vtkActor> outlineActor = vtkSmartPointer<vtkActor>::New();
    outlineActor->SetMapper( outLinemapper );
    outlineActor->GetProperty()->SetColor( 1,1,1 );
    // --------------------- Drawing bounding box end------------------------

    vtkSmartPointer<vtkRenderer> renderer =
            vtkSmartPointer<vtkRenderer>::New();
    renderer->AddActor( actor );
    renderer->AddActor( outlineActor );
    renderer->SetBackground( 0, 0, 0 );

    vtkSmartPointer<vtkRenderWindow> renderWindow =
            vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer( renderer );

    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
            vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow( renderWindow );

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

获取bounds的（x, y, z）数据：

double *vtkActor::GetBounds();