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C++ VTK鼠标网格表面绘制曲线
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前言

运行结果

文章目录

一、所需工具软件

二、使用步骤

代码如下（示例）：

#include <vtkActor.h>
#include <vtkCommand.h>
#include <vtkContourWidget.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkOrientedGlyphContourRepresentation.h>
#include <vtkPolyDataCollection.h>
#include <vtkPolyDataMapper.h>
#include <vtkPolygonalSurfacePointPlacer.h>
#include <vtkProperty.h>

namespace {
   
   

    class MyCallback : public vtkCommand
    {
   
   
    public:
        static MyCallback* New()
        {
   
   
            return new MyCallback;
        }
        MyCallback()
        {
   
   
        }

        virtual void Execute(vtkObject* caller, unsigned long, void*)
        {
   
   
            vtkContourWidget* contourWidget =
                reinterpret_cast<vtkContourWidget*>(caller);
            vtkContourRepresentation* rep = static_cast<vtkContourRepresentation*>(

        }

        void SetSphereSource(vtkSmartPointer<vtkSphereSource> sphere)
        {
   
   
            this->SphereSource = sphere;
        }

    private:
        vtkSmartPointer<vtkSphereSource> SphereSource;
    };

} // namespace

int main(int, char*[])
{
   
   
    vtkNew<vtkNamedColors> colors;

    vtkNew<vtkSphereSource> sphereSource;
    sphereSource->SetRadius(5);
    sphereSource->Update();

    vtkNew<vtkPolyDataMapper> mapper;
    mapper->SetInputConnection(sphereSource->GetOutputPort());

    vtkNew<vtkActor> actor;
    actor->SetMapper(mapper);
    actor->GetProperty()->SetColor(colors->GetColor3d("MistyRose").GetData());

    // Create the RenderWindow, Renderer
    vtkNew<vtkRenderer> renderer;
    vtkNew<vtkRenderWindow> renderWindow;
    renderWindow->AddRenderer(renderer);
    renderWindow->SetWindowName("PolygonalSurfacePointPlacer");

    vtkNew<vtkRenderWindowInteractor> interactor;
    interactor->SetRenderWindow(renderWindow);

    renderer->AddActor(actor);
    renderer->SetBackground(colors->GetColor3d("CadetBlue").GetData());

    vtkNew<vtkContourWidget> contourWidget;
    contourWidget->SetInteractor(interactor);

    vtkOrientedGlyphContourRepresentation* rep =
        dynamic_cast<vtkOrientedGlyphContourRepresentation*>(
            contourWidget->GetRepresentation());

    vtkNew<vtkPolygonalSurfacePointPlacer> pointPlacer;
    pointPlacer->AddProp(actor);
    pointPlacer->GetPolys()->AddItem(sphereSource->GetOutput());

    rep->GetLinesProperty()->SetColor(colors->GetColor3d("Crimson").GetData());
    rep->GetLinesProperty()->SetLineWidth(3.0);
    rep->SetPointPlacer(pointPlacer);

    contourWidget->EnabledOn();
    renderer->ResetCamera();
    renderWindow->Render();

    interactor->Start();

    return EXIT_SUCCESS;
}

运行结果

三、在线协助：

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