qt-everywhere-src-5.15.1/qtbase/examples/opengl/hellogl2/logo.h

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#ifndef LOGO_H
#define LOGO_H

#include <qopengl.h>
#include <QVector>
#include <QVector3D>

class Logo
{
public:
    Logo();
    const GLfloat *constData() const { return m_data.constData(); }
    int count() const { return m_count; }
    int vertexCount() const { return m_count / 6; }

private:
    void quad(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2, GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4);
    void extrude(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2);
    void add(const QVector3D &v, const QVector3D &n);

    QVector<GLfloat> m_data;
    int m_count = 0;
};

#endif // LOGO_H