Qt6.9 QtOpenGL绘制3D球体demo

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于 2025-07-05 00:55:55 发布 · 595 阅读

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pro文件：
QT       += core gui opengl openglwidgets widgets

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# 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 \
    openglwidget.cpp

HEADERS += \
    mainwindow.h \
    openglwidget.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

spherewidget.h

// spherewidget.h
#ifndef SPHEREWIDGET_H
#define SPHEREWIDGET_H

#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QOpenGLShaderProgram>
#include <QOpenGLBuffer>
#include <QOpenGLVertexArrayObject>
#include <QMatrix4x4>

class SphereWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT

public:
    explicit SphereWidget(QWidget *parent = nullptr);
    ~SphereWidget();

protected:
    void initializeGL() override;
    void resizeGL(int w, int h) override;
    void paintGL() override;

private:
    void createSphere(float radius, int sectors, int stacks);

    QOpenGLShaderProgram *m_program;
    QOpenGLBuffer m_vbo;
    QOpenGLVertexArrayObject m_vao;
    QMatrix4x4 m_projection;

    int m_numVertices;
    float m_angle;
};

#endif // SPHEREWIDGET_H

spherewidget.cpp

// spherewidget.cpp
#include "openglwidget.h"
#include <QDebug>
#include <cmath>

SphereWidget::SphereWidget(QWidget *parent)
    : QOpenGLWidget(parent)
    , m_program(nullptr)