QT學習VTK序列: vertex

學習VTK繪製點

(1) 頭文件

/*
 * ModuleName: 模塊名稱
 * Description:
 * 參考代碼：https://lorensen.github.io/VTKExamples/site/Cxx/GeometricObjects/QuadraticHexahedronDemo/
 * Author: hsw
 * Date: 2020-03-15
 *
*/

// QT
#include <QMainWindow>
#include <QDebug>

// VTK
#include <vtkActor.h>
#include <vtkCellArray.h>
#include <vtkNamedColors.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkVertex.h>
#include <vtkAutoInit.h>

#include <array>
#include <vector>
#include <map>
#include <sstream>

namespace Ui {
class MainWindow;
}

VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);
VTK_MODULE_INIT(vtkRenderingContextOpenGL2);
VTK_MODULE_INIT(vtkRenderingFreeType);

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
private:
    Ui::MainWindow *ui;
private:

};

(2) CPP文件

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

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

    vtkSmartPointer<vtkNamedColors> colors =
            vtkSmartPointer<vtkNamedColors>::New();
    // 保存數據
    vtkSmartPointer<vtkPoints> points =
            vtkSmartPointer<vtkPoints>::New();
    points->InsertNextPoint(0,0,0);
    // 保存拓撲信息
    vtkSmartPointer<vtkVertex> vertex =
            vtkSmartPointer<vtkVertex>::New();
    vertex->GetPointIds()->SetId(0, 0);
    // 保存拓撲信息
    vtkSmartPointer<vtkCellArray> vertices =
            vtkSmartPointer<vtkCellArray>::New();
    vertices->InsertNextCell(vertex);

    vtkSmartPointer<vtkPolyData> polydata =
            vtkSmartPointer<vtkPolyData>::New();
    polydata->SetPoints(points);
    polydata->SetVerts(vertices);


    // Setup actor and mapper
    vtkSmartPointer<vtkPolyDataMapper> mapper =
            vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputData(polydata);

    vtkSmartPointer<vtkActor> actor =
            vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->GetProperty()->SetPointSize(10);
    actor->GetProperty()->SetColor(colors->GetColor3d("Cyan").GetData());

    // Setup render window, renderer, and interactor
    vtkSmartPointer<vtkRenderer> renderer =
            vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow = ui->qvtkWidget->GetRenderWindow();
    renderWindow->SetWindowName("Vertex");
    renderWindow->AddRenderer(renderer);

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

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

(3) 效果