Qt&Vtk-011-Cone6

文章目錄

Qt&Vtk-Cone6

1 代碼搬運

1.1 cone6.h

1.2 cone6.cpp

2 運作效果

3 知識點

3.1 vtkBoxWidget

★ 源碼 ★

今天我們又來搬運代碼了，今天還是搞Cone，哈哈哈，已經是第六個Cone，不過這是最後一個了，還有點意思，先看看官方的例子。

#ifndef CONE6_H
#define CONE6_H

#include <QWidget>
#include <QTimer>
#include <QDebug>
#include <QString>
#include <QTextBrowser>
#include "QVTKOpenGLWidget.h"               //新版本，舊版QVTKWidget
#include "vtkAutoInit.h"

#include "vtkConeSource.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkCamera.h"
#include "vtkActor.h"
#include "vtkCommand.h"
#include "vtkBoxWidget.h"
#include "vtkTransform.h"
#include "vtkInteractorStyleTrackballCamera.h"


namespace Ui {
class Cone6;
}




class vtkMyCallBack : public vtkCommand
{
public:
    static vtkMyCallBack *New()
    {
        return new vtkMyCallBack;
    }
    void Execute(vtkObject *caller, unsigned long eventId, void *callData) override;
};


class Cone6 : public QWidget
{
    Q_OBJECT

public:
    explicit Cone6(QWidget *parent = 0);
    ~Cone6();

    void startInteractor();

private:
    Ui::Cone6 *ui;


    vtkConeSource *cone = nullptr;

    vtkPolyDataMapper *mapper = nullptr;

    vtkActor *actor = nullptr;

    vtkRenderer *render = nullptr;

    vtkRenderWindowInteractor *iren = nullptr;

    vtkInteractorStyleTrackballCamera * style = nullptr;

    vtkBoxWidget *boxWidget = nullptr;

    vtkMyCallBack *callback = nullptr;

};

#endif // CONE6_H

      

#include "cone6.h"
#include "ui_cone6.h"

Cone6::Cone6(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Cone6)
{
    ui->setupUi(this);


    cone = vtkConeSource::New();
    cone->SetRadius(1);
    cone->SetResolution(20);
    cone->SetHeight(3);



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



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


    render = vtkRenderer::New();
    render->AddActor(actor);
    render->SetBackground(0,0,1);


    ui->widget->GetRenderWindow()->AddRenderer(render);


    iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(ui->widget->GetRenderWindow());



    style = vtkInteractorStyleTrackballCamera::New();
    iren->SetInteractorStyle(style);


    boxWidget = vtkBoxWidget::New();
    boxWidget->SetInteractor(iren);
    boxWidget->SetPlaceFactor(1.25);

    boxWidget->SetProp3D(actor);
    boxWidget->PlaceWidget();


    callback = vtkMyCallBack::New();
    boxWidget->AddObserver(vtkCommand::InteractionEvent,callback);
    boxWidget->On();

    iren->Initialize();


}

Cone6::~Cone6()
{
    delete ui;
}

void Cone6::startInteractor()
{
    iren->Start();
}

void vtkMyCallBack::Execute(vtkObject *caller, unsigned long eventId, void *callData)
{
    vtkTransform *t = vtkTransform::New();
    vtkBoxWidget *widget = reinterpret_cast<vtkBoxWidget*>(caller);
    widget->GetTransform(t);
    widget->GetProp3D()->SetUserTransform(t);
    t->Delete();
}