Qt 三维数据显示之散点图（C++源码）

Qt 三维数据显示之散点图（C++源码）

        有时候我们的数据要用三维坐标显示。最近做了个小案例，分享一下源码。

 备注：滚轮可缩放，右键可旋转。

目录

配置安装

源码

工程文件包

---

配置安装

        Qt的三维坐标要用到Data Visualization模块，需要用Qt Maintenance Tool安装这个模块。

源码

pro文件

QT       += core gui datavisualization

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

ConFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += 
    main.cpp 
    mainwindow.cpp

HEADERS += 
    mainwindow.h

FORMS += 
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

main.cpp文件不变就不展示了。

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include 

#include 
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 on_comboCamera_currentIndexChanged(int index);

    void on_sliderH_valueChanged(int value);

    void on_sliderV_valueChanged(int value);

    void on_sliderZoom_valueChanged(int value);

    void on_comboTheme_currentIndexChanged(int index);

    void on_checkBoxBackground_clicked(bool checked);

    void on_checkBoxGrid_clicked(bool checked);

    void on_checkBoxAxisBackground_clicked(bool checked);

    void on_pushButtonAddData_clicked();

private:
    QWidget *graphContainer;  //图表的容器
    Q3DScatter *graph3D;   //散点图
    QScatter3DSeries *series;  //散点序列
    void initGraph3D();  //初始化


public:
    //为实现数据共享，公共化参数
    QScatterDataArray *dataArray;
    QScatterDataItem *ptrToDataArray;


private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

mainwindow.cpp

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

#include 


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

    initGraph3D(); //初始化散点图
    ui->verticalLayout_graph3D->addWidget(graphContainer);
}

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


void MainWindow::initGraph3D()
{

    //创建图表
    graph3D = new Q3DScatter();
    graphContainer = QWidget::createWindowContainer(graph3D);

    QScatterDataProxy *proxy = new QScatterDataProxy(); //数据代理
    series = new QScatter3DSeries(proxy); //创建序列
    series->setItemLabelFormat("@xLabel @yLabel @zLabel");
    series->setMeshSmooth(true);
    graph3D->addSeries(series);

    //创建坐标轴
    graph3D->axisX()->setTitle("axis X");
    graph3D->axisX()->setTitleVisible(true);

    graph3D->axisY()->setTitle("axis Y");
    graph3D->axisY()->setTitleVisible(true);

    graph3D->axisZ()->setTitle("axis Z");
    graph3D->axisZ()->setTitleVisible(true);

    graph3D->activeTheme()->setLabelBackgroundEnabled(false);

    series->setMesh(QAbstract3DSeries::MeshSphere);  //数据点为圆球
    series->setItemSize(0.2); //取值范围0~1 ，自动放缩因子

    int N = 41;
    int itemCount = N*N;
    dataArray = new QScatterDataArray();
    dataArray->resize(itemCount); //41*41个点
    ptrToDataArray = &dataArray->first();

    //墨西哥草帽， -10：0.5：10， N=41
    float x,y,z;
    int i,j;
    x=-10;

    for(i=1;isetPosition(QVector3D(x,y,z)); //添加点数据

            ptrToDataArray++;//指针加一
            y+=0.5;
        }
        x+=0.5;
    }

    series->dataProxy()->resetArray(dataArray);



}

void MainWindow::on_comboCamera_currentIndexChanged(int index)
{
    Q3DCamera::CameraPreset cameraPos = Q3DCamera::CameraPreset(index);
    graph3D->scene()->activeCamera()->setCameraPreset(cameraPos);
}


void MainWindow::on_sliderH_valueChanged(int value)
{
    Q_UNUSED(value);
    int xRot = ui->sliderH->value();  //水平
    int yRot = ui->sliderV->value();  //垂直
    int zoom = ui->sliderZoom->value();  //缩放
    graph3D->scene()->activeCamera()->setCameraPosition(xRot, yRot, zoom);

}


void MainWindow::on_sliderV_valueChanged(int value)
{
    Q_UNUSED(value);
    int xRot = ui->sliderH->value();  //水平
    int yRot = ui->sliderV->value();  //垂直
    int zoom = ui->sliderZoom->value();  //缩放
    graph3D->scene()->activeCamera()->setCameraPosition(xRot, yRot, zoom);
}



void MainWindow::on_sliderZoom_valueChanged(int value)
{
    Q_UNUSED(value);
    int xRot = ui->sliderH->value();  //水平
    int yRot = ui->sliderV->value();  //垂直
    int zoom = ui->sliderZoom->value();  //缩放
    graph3D->scene()->activeCamera()->setCameraPosition(xRot, yRot, zoom);
}


void MainWindow::on_comboTheme_currentIndexChanged(int index)
{
    //设置主题
    Q3DTheme *currentTheme = graph3D->activeTheme();
    currentTheme->setType(Q3DTheme::Theme(index));  //可以打开帮助看有什么主题

}


void MainWindow::on_checkBoxBackground_clicked(bool checked)
{
    //图表的背景
    graph3D->activeTheme()->setBackgroundEnabled(checked);
}


void MainWindow::on_checkBoxGrid_clicked(bool checked)
{
    //图标的网格
    graph3D->activeTheme()->setGridEnabled(checked);
}


void MainWindow::on_checkBoxAxisBackground_clicked(bool checked)
{
    //轴标签背景
    graph3D->activeTheme()->setLabelBackgroundEnabled(checked);
}


void MainWindow::on_pushButtonAddData_clicked()
{
    int N = 42;
    int itemCount = N*N;
//    dataArray = new QScatterDataArray();
    dataArray->resize(itemCount); //41*41个点
//    ptrToDataArray = &dataArray->first();


    int x=0;
    int y=0;
    int z=0;


    //产生0~9的随机数
    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
    for(int i=0; i<10; i++)
    {
        x =qrand()%10;
        y =qrand()%10;
        z =qrand()%10;

    }

    ptrToDataArray->setPosition(QVector3D(x,y,z)); //添加点数据
    ptrToDataArray++;//指针加一


    series->dataProxy()->resetArray(dataArray); //更新数据

}

工程文件包

3DScatterChart.zip-QT文档类资源-CSDN下载Qt3D散点图更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/laoxue123456/38621029