<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> I've just downloaded drscheme 299.400. mzscheme is part of it, so I'm now recompiling opengl (for my enumerations), and will try to use sgl in glsample.scm. But I get some strange error (see below). What could be wrong? > (require "mzgtk2-basic.scm") mzgtk2-basic.scm:20:2: module: identifier already imported (from a different source) at: begin in: (require (lib "sgl.scm" "sgl")) mzgtk2-basic.scm: (module mzgtk2-basic mzscheme   ;(require (lib "roos.scm" "roos"))   ;(require "mzgtk2-license.scm")   ;(require "mzgtk2wrap.scm")   ;(require "mzgtk2-gobject.scm")   ;(require "mzgtk2-types.scm")   ;(require "mzgtk2-stock.scm")   ;(require "mzgtk2-gtk-version.scm")   ;(require "mzgtk2-utils.scm")   ;(require "mzgtk2-debug.scm")   ;(require (lib "time.ss" "srfi" "19"))   (require (lib "sgl.scm" "sgl"))   ;(require (lib "opengl.scm" "opengl"))      ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;; Constants ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;   (define DEFAULT-HSPACE 3)   (define DEFAULT-VSPACE 3)   (define GTK-DEFAULT-BORDER-WIDTH 3)   Scott Owens schreef: <blockquote cite="mid8BA538DC-9E49-4FE1-8862-3871A607546F@cs.utah.edu" type="cite">The sgl collection relies only on the foreign-function interface (as  of v299.28), and can be used with either mred/DrScheme or mzscheme.   sgl only provides access to the functions documented in the GL (1.5)  and GLU specs, and not to the functions of glx, or whatever OS X or  MS Windows use to manage GL drawing contexts.  mred provides this  functionality, but sgl itself is agnostic about how the GL contexts  are managed (as is the OpenGL spec itself). -Scott On Sep 18, 2005, at 12:39 PM, Hans Oesterholt wrote: <blockquote type="cite">Scott Owens schreef: <blockquote type="cite">I'm curious if you are unaware of the GL binding that comes with  PLT  Scheme, or if you found it deficient. -Scott </blockquote> I didn't try it yet. It is part of drscheme, not mzscheme isn't it? Can I install it seperately from drscheme? I'll give it a try sometime soon. It's not that I don't want to use it. Some months ago, when I created mzopengl, wasn'tt aware of the existence of sgl. As I am about to release the first alpha of mzgtk2, I needan opengl binding working with mzgtk2 released. Hans </blockquote> </blockquote> </body> </html>