QT學習VTK序列: Point

學習繪製點

/*
 * ModuleName: 模塊名稱
 * Description:
 * 參考代碼：https://lorensen.github.io/VTKExamples/site/Cxx/GeometricObjects/Point/
 * 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 <vtkAutoInit.h>

// C++
#include <array>
#include <vector>
#include <string>

namespace Ui {
class MainWindow;
}

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

#include <string>
#include <vector>

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

};

#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();

    // Create the geometry of a point (the coordinate)
    vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
    const float p[3] = {1.0, 2.0, 3.0};
    vtkIdType pid[1];
    pid[0] = points->InsertNextPoint(p); // pid[0] is p insert cell id

    // Create the topology of the point (a vertex)
    vtkSmartPointer<vtkCellArray> vertices = vtkSmartPointer<vtkCellArray>::New();
    vertices->InsertNextCell(1, pid);

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

    // vtkPolyDataMapper
    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputData(point);

    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->GetProperty()->SetColor(colors->GetColor3d("Tomato").GetData());
    actor->GetProperty()->SetPointSize(20);

    vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow = ui->qvtkWidget->GetRenderWindow();
    renderWindow->SetWindowName("Point");
    renderWindow->AddRenderer(renderer);

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

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