Qt之3D绘制曲线：QtDataVisualization实时绘制散点图

一、Qt DataVisualization组件安装

在Qt安装时勾选 Qt Data Visualization组件，该组件包含相关三维图形绘制组件，利用其开发三维绘图功能需要勾选。

二、准备

1、在项目的.pro文件中加上 QT += datavisualization

QT += datavisualization

2、引用头文件及名字空间

#include <QtDataVisualization>

#include <QAbstract3DInputHandler>

using namespace QtDataVisualization;

三、ui设计

两个按钮，一个widget用于放置三维散点图表。

四、头文件代码

cpp 复制代码

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>


#include <QVector3D>
#include <QDebug>
#include <QPointF>
#include <QtDataVisualization>
#include <QAbstract3DInputHandler>
#include <QSplitter>

#define PI 3.1415
typedef QVector<QVector3D> MY_BUF3D ;

using namespace QtDataVisualization;



QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void drawPoint(MY_BUF3D);

    void on_pushButton_1_clicked();

    void on_pushButton_2_clicked();



private:
    Ui::MainWindow *ui;

    void initMap();
    void generateRandomPoints(QVector<QVector3D>& MY_BUF3D, int pointCount, float minX, float maxX, float minY, float maxY, float minZ, float maxZ);

    Q3DScatter *g_3Dgraph;
    QScatter3DSeries *g_3Dseries;//散点类型
    QtDataVisualization::Q3DCamera *g_camera;


};
#endif // MAINWINDOW_H

五、源文件代码

cpp 复制代码

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

#include <QSplitter>

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

    qRegisterMetaType<MY_BUF3D>("MY_BUF3D");
    this->setWindowTitle("UDP_Reciver");

    initMap();
    QSplitter *splitter = new QSplitter(Qt::Horizontal);

    splitter->addWidget(ui->widget);

    splitter->addWidget(ui->pushButton_2);
    splitter->addWidget(ui->pushButton_1);

    this->setCentralWidget(splitter);

}

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

void MainWindow::initMap()
{
    g_3Dgraph = new Q3DScatter();
    ui->widget = QWidget::createWindowContainer(g_3Dgraph);
    QScatterDataProxy *proxy = new QScatterDataProxy(); //数据代理
    g_3Dseries = new QScatter3DSeries(proxy);//创建序列
    g_3Dseries->setMeshSmooth(true);

    g_3Dgraph->addSeries(g_3Dseries);
    //创建坐标轴
    g_3Dgraph->axisX()->setTitle("axis X");
    g_3Dgraph->axisX()->setTitleVisible(true);
    g_3Dgraph->axisX()->setRange(-10,10);
    g_3Dgraph->axisY()->setTitle("axis Y");
    g_3Dgraph->axisY()->setTitleVisible(true);
    g_3Dgraph->axisY()->setRange(-10,10);
    g_3Dgraph->axisZ()->setTitle("axis Z");
    g_3Dgraph->axisZ()->setTitleVisible(true);
    g_3Dgraph->axisZ()->setRange(-50,50);
    g_3Dgraph->activeTheme()->setLabelBackgroundEnabled(false);
    g_3Dgraph->activeTheme()->setBackgroundColor(QColor(90,90,90));//设置背景色

    // 获取活动相机
    g_camera = g_3Dgraph->scene()->activeCamera();

    // 设置相机的方位角和仰角
    g_camera->setXRotation(45.0f);
    g_camera->setYRotation(30.0f);

    // 设置相机的距离
    g_camera->setZoomLevel(150.0f);



    g_3Dseries->setMesh(QAbstract3DSeries::MeshSphere);//数据点为圆球
    g_3Dseries->setSingleHighlightColor(QColor(0,0,255));//设置点选中时的高亮颜色
    g_3Dseries->setBaseColor(QColor(0,255,255));//设置点的颜色
    g_3Dseries->setItemSize(0.05);//设置点的大小
}