Hi Andre, This:
gluTessCallback(tobj, (GLenum)GLU_BEGIN, glBegin); gluTessCallback(tobj, (GLenum)GLU_END, glEnd); gluTessCallback(tobj, (GLenum)GLU_VERTEX, glVertex2fv); Would give me these errors: x.c++: In function `void test()': x.c++:7: error: invalid conversion from `void (*)(GLenum)' to `void (*)()' x.c++:7: error: initializing argument 3 of `void gluTessCallback(GLUtesselator*, GLenum, void (*)())' x.c++:9: error: invalid conversion from `void (*)(const GLfloat*)' to `void (*)()' x.c++:9: error: initializing argument 3 of `void gluTessCallback(GLUtesselator*, GLenum, void (*)())' But the below fixes the problem: gluTessCallback(tobj, (GLenum)GLU_BEGIN, (_GLUfuncptr)glBegin); gluTessCallback(tobj, (GLenum)GLU_END, glEnd); gluTessCallback(tobj, (GLenum)GLU_VERTEX, (_GLUfuncptr)glVertex2fv); Thanks Andre, Linh -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of André Bleau Sent: Tuesday, December 09, 2008 5:38 AM To: [email protected] Subject: RE: OpenGL-1.1.0 compile problem in cygwin-1.7 "Phan, Linh H" wrote: > > Hi Brian, > > Can you show me how I can fix the cast? I tried this: > > #include > #include > void test (void) > { > GLUtesselator *tobj = (GLUtesselator *)gluNewTess(); > gluTessCallback(tobj, (GLenum)GLU_BEGIN, (void (*)())glBegin); > gluTessCallback(tobj, (GLenum)GLU_END, glEnd); > gluTessCallback(tobj, (GLenum)GLU_VERTEX, (void (*)())glVertex2fv); > } > > And that fixed it for glEnd, but I don't know how to fix the glBegin and > glVertex2fv. > This is not my code; it's part of the SGI OpenInventor library. > > Thank you, > > Linh > Hi Linh, Did you try: #include #include void test (void) { GLUtesselator *tobj = gluNewTess(); gluTessCallback(tobj, (GLenum)GLU_BEGIN, glBegin); gluTessCallback(tobj, (GLenum)GLU_END, glEnd); gluTessCallback(tobj, (GLenum)GLU_VERTEX, glVertex2fv); } Anyway, glu.h shows that the prototype for gluTessCallback is: GLAPI void APIENTRY gluTessCallback (GLUtesselator* tess, GLenum which, _GLUfuncptr CallBackFunc); so (_GLUfuncptr) is the obvious cast, no? - André Bleau, Cygwin's volunteer OpenGL package maintainer. Please direct any question or comment about the OpenGL package to cygwin at cygwin dot com _________________________________________________________________ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/ -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
