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3 As a special exception, you have permission to link this program
4 with the CGAL library and distribute executables, as long as you
5 follow the requirements of the GNU GPL in regard to all of the
6 software in the executable aside from CGAL.
9 GNU GENERAL PUBLIC LICENSE
10 Version 2, June 1991
12 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
13 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
14 Everyone is permitted to copy and distribute verbatim copies
15 of this license document, but changing it is not allowed.
19 The licenses for most software are designed to take away your
20 freedom to share and change it. By contrast, the GNU General Public
21 License is intended to guarantee your freedom to share and change free
22 software--to make sure the software is free for all its users. This
23 General Public License applies to most of the Free Software
24 Foundation's software and to any other program whose authors commit to
25 using it. (Some other Free Software Foundation software is covered by
26 the GNU Library General Public License instead.) You can apply it to
27 your programs, too.
29 When we speak of free software, we are referring to freedom, not
30 price. Our General Public Licenses are designed to make sure that you
31 have the freedom to distribute copies of free software (and charge for
32 this service if you wish), that you receive source code or can get it
33 if you want it, that you can change the software or use pieces of it
34 in new free programs; and that you know you can do these things.
36 To protect your rights, we need to make restrictions that forbid
37 anyone to deny you these rights or to ask you to surrender the rights.
38 These restrictions translate to certain responsibilities for you if you
39 distribute copies of the software, or if you modify it.
41 For example, if you distribute copies of such a program, whether
42 gratis or for a fee, you must give the recipients all the rights that
43 you have. You must make sure that they, too, receive or can get the
44 source code. And you must show them these terms so they know their
47 We protect your rights with two steps: (1) copyright the software, and
48 (2) offer you this license which gives you legal permission to copy,
49 distribute and/or modify the software.
51 Also, for each author's protection and ours, we want to make certain
52 that everyone understands that there is no warranty for this free
53 software. If the software is modified by someone else and passed on, we
54 want its recipients to know that what they have is not the original, so
55 that any problems introduced by others will not reflect on the original
56 authors' reputations.
58 Finally, any free program is threatened constantly by software
59 patents. We wish to avoid the danger that redistributors of a free
60 program will individually obtain patent licenses, in effect making the
61 program proprietary. To prevent this, we have made it clear that any
62 patent must be licensed for everyone's free use or not licensed at all.
64 The precise terms and conditions for copying, distribution and
65 modification follow.
67 GNU GENERAL PUBLIC LICENSE
68 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
70 0. This License applies to any program or other work which contains
71 a notice placed by the copyright holder saying it may be distributed
72 under the terms of this General Public License. The "Program", below,
73 refers to any such program or work, and a "work based on the Program"
74 means either the Program or any derivative work under copyright law:
75 that is to say, a work containing the Program or a portion of it,
76 either verbatim or with modifications and/or translated into another
77 language. (Hereinafter, translation is included without limitation in
78 the term "modification".) Each licensee is addressed as "you".
80 Activities other than copying, distribution and modification are not
81 covered by this License; they are outside its scope. The act of
82 running the Program is not restricted, and the output from the Program
83 is covered only if its contents constitute a work based on the
84 Program (independent of having been made by running the Program).
85 Whether that is true depends on what the Program does.
87 1. You may copy and distribute verbatim copies of the Program's
88 source code as you receive it, in any medium, provided that you
89 conspicuously and appropriately publish on each copy an appropriate
90 copyright notice and disclaimer of warranty; keep intact all the
91 notices that refer to this License and to the absence of any warranty;
92 and give any other recipients of the Program a copy of this License
93 along with the Program.
95 You may charge a fee for the physical act of transferring a copy, and
96 you may at your option offer warranty protection in exchange for a fee.
98 2. You may modify your copy or copies of the Program or any portion
99 of it, thus forming a work based on the Program, and copy and
100 distribute such modifications or work under the terms of Section 1
101 above, provided that you also meet all of these conditions:
103 a) You must cause the modified files to carry prominent notices
104 stating that you changed the files and the date of any change.
106 b) You must cause any work that you distribute or publish, that in
107 whole or in part contains or is derived from the Program or any
108 part thereof, to be licensed as a whole at no charge to all third
109 parties under the terms of this License.
111 c) If the modified program normally reads commands interactively
112 when run, you must cause it, when started running for such
113 interactive use in the most ordinary way, to print or display an
114 announcement including an appropriate copyright notice and a
115 notice that there is no warranty (or else, saying that you provide
116 a warranty) and that users may redistribute the program under
117 these conditions, and telling the user how to view a copy of this
118 License. (Exception: if the Program itself is interactive but
119 does not normally print such an announcement, your work based on
120 the Program is not required to print an announcement.)
122 These requirements apply to the modified work as a whole. If
123 identifiable sections of that work are not derived from the Program,
124 and can be reasonably considered independent and separate works in
125 themselves, then this License, and its terms, do not apply to those
126 sections when you distribute them as separate works. But when you
127 distribute the same sections as part of a whole which is a work based
128 on the Program, the distribution of the whole must be on the terms of
129 this License, whose permissions for other licensees extend to the
130 entire whole, and thus to each and every part regardless of who wrote it.
132 Thus, it is not the intent of this section to claim rights or contest
133 your rights to work written entirely by you; rather, the intent is to
134 exercise the right to control the distribution of derivative or
135 collective works based on the Program.
137 In addition, mere aggregation of another work not based on the Program
138 with the Program (or with a work based on the Program) on a volume of
139 a storage or distribution medium does not bring the other work under
140 the scope of this License.
142 3. You may copy and distribute the Program (or a work based on it,
143 under Section 2) in object code or executable form under the terms of
144 Sections 1 and 2 above provided that you also do one of the following:
146 a) Accompany it with the complete corresponding machine-readable
147 source code, which must be distributed under the terms of Sections
148 1 and 2 above on a medium customarily used for software interchange; or,
150 b) Accompany it with a written offer, valid for at least three
151 years, to give any third party, for a charge no more than your
152 cost of physically performing source distribution, a complete
153 machine-readable copy of the corresponding source code, to be
154 distributed under the terms of Sections 1 and 2 above on a medium
155 customarily used for software interchange; or,
157 c) Accompany it with the information you received as to the offer
158 to distribute corresponding source code. (This alternative is
159 allowed only for noncommercial distribution and only if you
160 received the program in object code or executable form with such
161 an offer, in accord with Subsection b above.)
163 The source code for a work means the preferred form of the work for
164 making modifications to it. For an executable work, complete source
165 code means all the source code for all modules it contains, plus any
166 associated interface definition files, plus the scripts used to
167 control compilation and installation of the executable. However, as a
168 special exception, the source code distributed need not include
169 anything that is normally distributed (in either source or binary
170 form) with the major components (compiler, kernel, and so on) of the
171 operating system on which the executable runs, unless that component
172 itself accompanies the executable.
174 If distribution of executable or object code is made by offering
175 access to copy from a designated place, then offering equivalent
176 access to copy the source code from the same place counts as
177 distribution of the source code, even though third parties are not
178 compelled to copy the source along with the object code.
180 4. You may not copy, modify, sublicense, or distribute the Program
181 except as expressly provided under this License. Any attempt
182 otherwise to copy, modify, sublicense or distribute the Program is
183 void, and will automatically terminate your rights under this License.
184 However, parties who have received copies, or rights, from you under
185 this License will not have their licenses terminated so long as such
186 parties remain in full compliance.
188 5. You are not required to accept this License, since you have not
189 signed it. However, nothing else grants you permission to modify or
190 distribute the Program or its derivative works. These actions are
191 prohibited by law if you do not accept this License. Therefore, by
192 modifying or distributing the Program (or any work based on the
193 Program), you indicate your acceptance of this License to do so, and
194 all its terms and conditions for copying, distributing or modifying
195 the Program or works based on it.
197 6. Each time you redistribute the Program (or any work based on the
198 Program), the recipient automatically receives a license from the
199 original licensor to copy, distribute or modify the Program subject to
200 these terms and conditions. You may not impose any further
201 restrictions on the recipients' exercise of the rights granted herein.
202 You are not responsible for enforcing compliance by third parties to
203 this License.
205 7. If, as a consequence of a court judgment or allegation of patent
206 infringement or for any other reason (not limited to patent issues),
207 conditions are imposed on you (whether by court order, agreement or
208 otherwise) that contradict the conditions of this License, they do not
209 excuse you from the conditions of this License. If you cannot
210 distribute so as to satisfy simultaneously your obligations under this
211 License and any other pertinent obligations, then as a consequence you
212 may not distribute the Program at all. For example, if a patent
213 license would not permit royalty-free redistribution of the Program by
214 all those who receive copies directly or indirectly through you, then
215 the only way you could satisfy both it and this License would be to
216 refrain entirely from distribution of the Program.
218 If any portion of this section is held invalid or unenforceable under
219 any particular circumstance, the balance of the section is intended to
220 apply and the section as a whole is intended to apply in other
223 It is not the purpose of this section to induce you to infringe any
224 patents or other property right claims or to contest validity of any
225 such claims; this section has the sole purpose of protecting the
226 integrity of the free software distribution system, which is
227 implemented by public license practices. Many people have made
228 generous contributions to the wide range of software distributed
229 through that system in reliance on consistent application of that
230 system; it is up to the author/donor to decide if he or she is willing
231 to distribute software through any other system and a licensee cannot
232 impose that choice.
234 This section is intended to make thoroughly clear what is believed to
235 be a consequence of the rest of this License.
237 8. If the distribution and/or use of the Program is restricted in
238 certain countries either by patents or by copyrighted interfaces, the
239 original copyright holder who places the Program under this License
240 may add an explicit geographical distribution limitation excluding
241 those countries, so that distribution is permitted only in or among
242 countries not thus excluded. In such case, this License incorporates
243 the limitation as if written in the body of this License.
245 9. The Free Software Foundation may publish revised and/or new versions
246 of the General Public License from time to time. Such new versions will
247 be similar in spirit to the present version, but may differ in detail to
248 address new problems or concerns.
250 Each version is given a distinguishing version number. If the Program
251 specifies a version number of this License which applies to it and "any
252 later version", you have the option of following the terms and conditions
253 either of that version or of any later version published by the Free
254 Software Foundation. If the Program does not specify a version number of
255 this License, you may choose any version ever published by the Free Software
258 10. If you wish to incorporate parts of the Program into other free
259 programs whose distribution conditions are different, write to the author
260 to ask for permission. For software which is copyrighted by the Free
261 Software Foundation, write to the Free Software Foundation; we sometimes
262 make exceptions for this. Our decision will be guided by the two goals
263 of preserving the free status of all derivatives of our free software and
264 of promoting the sharing and reuse of software generally.
266 NO WARRANTY
268 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
269 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
270 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
271 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
272 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
273 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
274 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
275 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
276 REPAIR OR CORRECTION.
278 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
279 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
280 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
281 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
282 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
283 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
284 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
285 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
286 POSSIBILITY OF SUCH DAMAGES.
288 END OF TERMS AND CONDITIONS
290 How to Apply These Terms to Your New Programs
292 If you develop a new program, and you want it to be of the greatest
293 possible use to the public, the best way to achieve this is to make it
294 free software which everyone can redistribute and change under these terms.
296 To do so, attach the following notices to the program. It is safest
297 to attach them to the start of each source file to most effectively
298 convey the exclusion of warranty; and each file should have at least
299 the "copyright" line and a pointer to where the full notice is found.
301 <one line to give the program's name and a brief idea of what it does.>
302 Copyright (C) <year> <name of author>
304 This program is free software; you can redistribute it and/or modify
305 it under the terms of the GNU General Public License as published by
306 the Free Software Foundation; either version 2 of the License, or
307 (at your option) any later version.
309 This program is distributed in the hope that it will be useful,
310 but WITHOUT ANY WARRANTY; without even the implied warranty of
311 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
312 GNU General Public License for more details.
314 You should have received a copy of the GNU General Public License
315 along with this program; if not, write to the Free Software
316 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
319 Also add information on how to contact you by electronic and paper mail.
321 If the program is interactive, make it output a short notice like this
322 when it starts in an interactive mode:
324 Gnomovision version 69, Copyright (C) year name of author
325 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
326 This is free software, and you are welcome to redistribute it
327 under certain conditions; type `show c' for details.
329 The hypothetical commands `show w' and `show c' should show the appropriate
330 parts of the General Public License. Of course, the commands you use may
331 be called something other than `show w' and `show c'; they could even be
332 mouse-clicks or menu items--whatever suits your program.
334 You should also get your employer (if you work as a programmer) or your
335 school, if any, to sign a "copyright disclaimer" for the program, if
336 necessary. Here is a sample; alter the names:
338 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
339 `Gnomovision' (which makes passes at compilers) written by James Hacker.
341 <signature of Ty Coon>, 1 April 1989
342 Ty Coon, President of Vice
344 This General Public License does not permit incorporating your program into
345 proprietary programs. If your program is a subroutine library, you may
346 consider it more useful to permit linking proprietary applications with the
347 library. If this is what you want to do, use the GNU Library General
348 Public License instead of this License.