- gluTessCallback(tess, GLU_TESS_BEGIN, G_CALLBACK(glBegin));
- gluTessCallback(tess, GLU_TESS_VERTEX, G_CALLBACK(glVertex3dv));
- gluTessCallback(tess, GLU_TESS_END, G_CALLBACK(glEnd));
+ gluTessCallback(tess, GLU_TESS_BEGIN, (void*)glBegin);
+ gluTessCallback(tess, GLU_TESS_VERTEX, (void*)glVertex3dv);
+ gluTessCallback(tess, GLU_TESS_END, (void*)glEnd);