QT用opengl绘制一个立方体

以下是使用OpenGL和Qt绘制立方体的示例代码：

#include <QtGui/QOpenGLFunctions>
#include <QtGui/QOpenGLShaderProgram>
#include <QtGui/QOpenGLVertexArrayObject>
#include <QtGui/QOpenGLBuffer>

class CubeRenderer : public QOpenGLFunctions
{
public:
    CubeRenderer() {}

    void initialize()
    {
        initializeOpenGLFunctions();

        m_program = new QOpenGLShaderProgram();
        m_program->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/vertex.glsl");
        m_program->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/fragment.glsl");
        m_program->link();

        m_vao = new QOpenGLVertexArrayObject();
        m_vao->create();
        m_vao->bind();

        float vertices[] = {
            // Front face
            -1.0f, -1.0f,  1.0f,
             1.0f, -1.0f,  1.0f,
             1.0f,  1.0f,  1.0f,
            -1.0f,  1.0f,  1.0f,

            // Back face
            -1.0f, -1.0f, -1.0f,
            -1.0f,  1.0f, -1.0f,
             1.0f,  1.0f, -1.0f,
             1.0f, -1.0f, -1.0f,

            // Top face
            -1.0f,  1.0f, -1.0f,
            -1.0f,  1.0f,  1.0f,
             1.0f,  1.0f,  1.0f,
             1.0f,  1.0f, -1.0f,

            // Bottom face
            -1.0f, -1.0f, -1.0f,
             1.0f, -1.0f, -1.0f,
             1.0f, -1.0f,  1.0f,
            -1.0f, -1.0f,  1.0f,

            // Right face
             1.0f, -1.0f, -1.0f,
             1.0f,  1.0f, -1.0f,
             1.0f,  1.0f,  1.0f,
             1.0f, -1.0f,  1.0f,

            // Left face
            -1.0f, -1.0f, -1.0f,
            -1.0f, -1.0f,  1.0f,
            -1.0f,  1.0f,  1.0f,
            -1.0f,  1.0f, -1.0f
        };

        m_vbo = new QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
        m_vbo->create();
        m_vbo->bind();
        m_vbo->allocate(vertices, sizeof(vertices));

        m_program->enableAttributeArray(0);
        m_program->setAttributeBuffer(0, GL_FLOAT, 0, 3, 3 * sizeof(float));

        m_vao->release();
        m_vbo->release();

        glEnable(GL_DEPTH_TEST);
    }

    void render()
    {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        m_program->bind();
        m_vao->bind();

        glDrawArrays(GL_QUADS, 0, 24);

        m_vao->release();
        m_program->release();
    }

private:
    QOpenGLShaderProgram *m_program;
    QOpenGLVertexArrayObject *m_vao;
    QOpenGLBuffer *m_vbo;
};

// 在你的OpenGL窗口中的绘制函数中调用以下代码：

CubeRenderer cubeRenderer;
cubeRenderer.initialize();
cubeRenderer.render();

在此示例代码中，我们使用了OpenGL的立方体顶点数据和一个简单的着色器程序来绘制立方体。我们还使用了Qt的OpenGL函数、着色器程序、顶点数组对象和缓冲区对象来管理OpenGL状态。