1 ;;; Copyright (c) 2007 Zachary Beane, All Rights Reserved
3 ;;; Redistribution and use in source and binary forms, with or without
4 ;;; modification, are permitted provided that the following conditions
7 ;;; * Redistributions of source code must retain the above copyright
8 ;;; notice, this list of conditions and the following disclaimer.
10 ;;; * Redistributions in binary form must reproduce the above
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15 ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
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27 ;;; $Id: copy.lisp,v 1.2 2007/09/20 18:00:37 xach Exp $
31 (defgeneric copy
(object)
33 "Copy an object in a way suitable for pushing to the graphics state
34 stack. That is, if it's an immutable object, simply return the
35 object; otherwise, create a new object with the immutable state