程序示例精选
Qt+VTK鼠标拾取点生成拉伸闭合三维体
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前言

这篇博客针对《Qt+VTK鼠标拾取点生成拉伸闭合三维体》编写代码，代码整洁，规则，易读。 学习与应用推荐首选。

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运行结果

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文章目录

一、所需工具软件
二、使用步骤
       1. 主要代码
       2. 运行结果
三、在线协助

一、所需工具软件

       1. VS2019, Qt
       2. C++

二、使用步骤

代码如下（示例）：

#include "mainwindow.h"
#include "ui_mainwindow.h"


#include <vtkActor.h>
#include <vtkCellArray.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkObjectFactory.h>
#include <vtkPlaneSource.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkPropPicker.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkRendererCollection.h>
#include <vtkSphereSource.h>
#include <vtkSTLReader.h>

#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkPoints.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkUnsignedCharArray.h>
#include <vtkPointData.h>

#include <vtkGlyph3D.h>
#include <vtkSphereSource.h>

#include <vtkActor.h>
#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkNamedColors.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSTLReader.h>
#include <vtkClipPolyData.h>
#include <vtkSelectPolyData.h>
#include <Eigen/Dense>
#include <vtkPlane.h>
#include <vtkLookupTable.h>
#include <vtkBooleanOperationPolyDataFilter.h>
#include <vtkDelaunay2D.h>
#include <vtkLinearExtrusionFilter.h>
#include <vtkPolygon.h>

namespace {

    // Handle mouse events
    class MouseInteractorStyle2 : public vtkInteractorStyleTrackballCamera
    {
    public:

        static MouseInteractorStyle2* New();
        vtkTypeMacro(MouseInteractorStyle2, vtkInteractorStyleTrackballCamera);
        vtkNew<vtkNamedColors> colors;
        virtual void OnLeftButtonDown() override
        {
            if (!pickingModeActive)
            {
                int* clickPos = this->GetInteractor()->GetEventPosition();
                vtkNew<vtkPropPicker> picker;
                picker->Pick(clickPos[0], clickPos[1], 0, this->GetDefaultRenderer());
                double* pos = picker->GetPickPosition();
                std::cout << "Pick position (world coordinates) is: " << pos[0] << " "
                    << pos[1] << " " << pos[2] << std::endl;
                  double* newPoint = new double[3];
                  newPoint[0] = pos[0];
                  newPoint[1] = pos[1];
                  newPoint[2] = pos[2];
                  collectedPoints.push_back(newPoint);
                auto pickedActor = picker->GetActor();
                if (pickedActor == nullptr)
                {
                    std::cout << "No actor picked." << std::endl;
                }
             
} // namespace


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


    QObject::connect(ui->actionOpen_File_3, &QAction::triggered, this, &MainWindow::on_actionPickPoint_triggered);
    QObject::connect(ui->actionStart, &QAction::triggered, this, &MainWindow::actionPickPointStart);

    renderer = vtkSmartPointer<vtkRenderer>::New();
    renderer->SetBackground(0.1, 0.2, 0.4);
    ui->widget->GetRenderWindow()->AddRenderer(renderer);
}

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

void MainWindow::actionPickPointStart()
{
    pickingModeActive = !pickingModeActive;
}

void MainWindow::actionPickPointClose()
{
    pickingModeActive = !pickingModeActive;
}

void MainWindow::actionPickPoint()
{
	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-

}

运行结果

三、在线协助：

如需安装运行环境或远程调试，见文章底部个人 QQ 名片，由专业技术人员远程协助！

1）远程安装运行环境，代码调试
2）Visual Studio, Qt, C++, Python编程语言入门指导
3）界面美化
4）软件制作
5）云服务器申请
6）网站制作

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