Qt QOpenGLFunctions not declared in this scope - qt

Question

I'm creating a sort of drawable object class for mesh data and i'm getting this linker error. This is also on top of another class that handles the drawing of the meshes that was used in one of the Qt tutorials. I'm also using a QGLWidget to be the surface i'm drawing to. Here's what the header file looks for the first class.
#ifndef GLOBJECT_H
#define GLOBJECT_H
#include <QOpenGLFunctions>
#include <QOpenGLShaderProgram>
#include <QVector3D>
#include <QVector2D>
#include <QDebug>
#include <QFile>
struct VertexData
{
QVector3D position;
QVector2D texCoord;
QVector3D normal;
};
class GLObject
{
public:
GLObject();
VertexData *data;
GLushort *indices;
GLuint vboIds[2];
int faceCount, vertCount;
bool generateFromPLY(QString filename);
};
#endif // GLOBJECT_H
Here's the header for the other class.
#ifndef GEOMETRYENGINE_H
#define GEOMETRYENGINE_H
#include <QObject>
#include <QOpenGLFunctions>
#include <QOpenGLShaderProgram>
#include <QVector2D>
#include <QVector3D>
#include <QFile>
#include <QDebug>
#include <QVector>
#include <globject.h>
class GeometryEngine : public QObject, protected QOpenGLFunctions
{
Q_OBJECT
public:
GeometryEngine();
~GeometryEngine();
void init();
void drawGeometry(QOpenGLShaderProgram *program);
//void drawCubeGeometry(QOpenGLShaderProgram *program);
bool generateFromPly(QString filename);
QVector<GLObject> drawables;
int drawableId = 0;
};
#endif // GEOMETRYENGINE_H
G:\Dropbox\GLSLDemo\globject.cpp:60: error: 'glGenBuffers' was not declared in this scope
glGenBuffers(2, vboIds);
along with the same error for the other gl calls.
Initially I had all the code in GeometryEngine to begin with. I didn't have a scope issue then. initilizeOpenGLFunctions() is called in GeometryEngine's init() if that's relevant.
^

Answer 1

QT OpenGL is weird. I think the QOpenGLFunctions maintains a common context. Also i'm bad at C++ and used protected wrong.