​ 摘要

1 官方示例展示

​ 今天搬运的代码是官方实例PiecewiseItem，先看先官方代码跑起来的样子。

​ 不知道这个是Bug，还是需要的效果，暂时我也不是很理解，只能是先搬运代码，后面再看看小红书。可能后面会慢慢理解吧。

2 代码搬运

2.1 piecewiseitem.h

#ifndef PIECEWISEITEM_H
#define PIECEWISEITEM_H

#include <QWidget>
#include "QVTKOpenGLWidget.h"               //新版本，旧版QVTKWidget
#include "vtkAutoInit.h"

#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"

#include "vtkSmartPointer.h"
#include "vtkContextView.h"
#include "vtkContextScene.h"
#include "vtkPiecewiseFunction.h"
#include "vtkPiecewiseFunctionItem.h"
#include "vtkPiecewiseControlPointsItem.h"

namespace Ui {
class PiecewiseItem;
}

class PiecewiseItem : public QWidget
{
    Q_OBJECT

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

private:
    Ui::PiecewiseItem *ui;

    vtkSmartPointer<vtkContextView> view = nullptr;
    vtkSmartPointer<vtkPiecewiseFunction> source = nullptr;
    vtkSmartPointer<vtkPiecewiseControlPointsItem> item = nullptr;
};

#endif // PIECEWISEITEM_H


  

 

  
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2.2 piecewiseitem.cpp

#include "piecewiseitem.h"
#include "ui_piecewiseitem.h"

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


    view = vtkSmartPointer<vtkContextView>::New();
    view->SetRenderWindow(ui->widget->GetRenderWindow());
    view->GetRenderer()->SetBackground(0,0,1);

    source = vtkSmartPointer<vtkPiecewiseFunction>::New();
    source->AddPoint(0,0);
    source->AddPoint(200,200);
    source->AddPoint(400,600);
    source->AddPoint(700,500);

    item = vtkSmartPointer<vtkPiecewiseControlPointsItem>::New();
    item->SetPiecewiseFunction(source);

    view->GetScene()->AddItem(item);



}

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


  

 

  
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3 运行效果

★ 源码 ★

​ 源码分享一时爽，一直分享一直爽， 链接如下：

自取：https://github.com/DreamLife-Jianwei/Qt-Vtk

文章来源: dreamlife.blog.csdn.net，作者：DreamLife.，版权归原作者所有，如需转载，请联系作者。

原文链接：dreamlife.blog.csdn.net/article/details/119633441