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GNU GENERAL PUBLIC LICENSE |
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Version 3, 29 June 2007 |
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> |
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Everyone is permitted to copy and distribute verbatim copies |
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of this license document, but changing it is not allowed. |
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Preamble |
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The GNU General Public License is a free, copyleft license for |
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software and other kinds of works. |
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The licenses for most software and other practical works are designed |
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the GNU General Public License is intended to guarantee your freedom to |
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share and change all versions of a program--to make sure it remains free |
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software for all its users. We, the Free Software Foundation, use the |
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GNU General Public License for most of our software; it applies also to |
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any other work released this way by its authors. You can apply it to |
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your programs, too. |
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When we speak of free software, we are referring to freedom, not |
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TERMS AND CONDITIONS |
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0. Definitions. |
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"This License" refers to version 3 of the GNU General Public License. |
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The Corresponding Source for a work in source code form is that |
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All rights granted under this License are granted for the term of |
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Conveying under any other circumstances is permitted solely under |
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When you convey a covered work, you waive any legal power to forbid |
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c) You must license the entire work, as a whole, under this |
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A compilation of a covered work with other separate and independent |
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6. Conveying Non-Source Forms. |
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You may convey a covered work in object code form under the terms |
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a) Convey the object code in, or embodied in, a physical product |
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b) Convey the object code in, or embodied in, a physical product |
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written offer, valid for at least three years and valid for as |
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model, to give anyone who possesses the object code either (1) a |
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medium customarily used for software interchange, for a price no |
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conveying of source, or (2) access to copy the |
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c) Convey individual copies of the object code with a copy of the |
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only if you received the object code with such an offer, in accord |
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e) Convey the object code using peer-to-peer transmission, provided |
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you inform other peers where the object code and Corresponding |
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Source of the work are being offered to the general public at no |
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charge under subsection 6d. |
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A separable portion of the object code, whose source code is excluded |
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from the Corresponding Source as a System Library, need not be |
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included in conveying the object code work. |
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A "User Product" is either (1) a "consumer product", which means any |
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into a dwelling. In determining whether a product is a consumer product, |
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commercial, industrial or non-consumer uses, unless such uses represent |
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the only significant mode of use of the product. |
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"Installation Information" for a User Product means any methods, |
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procedures, authorization keys, or other information required to install |
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||||||
and execute modified versions of a covered work in that User Product from |
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||||||
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code is in no case prevented or interfered with solely because |
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modification has been made. |
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If you convey an object code work under this section in, or with, or |
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specifically for use in, a User Product, and the conveying occurs as |
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||||||
part of a transaction in which the right of possession and use of the |
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Corresponding Source conveyed under this section must be accompanied |
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||||||
by the Installation Information. But this requirement does not apply |
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||||||
if neither you nor any third party retains the ability to install |
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modified object code on the User Product (for example, the work has |
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been installed in ROM). |
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||||||
The requirement to provide Installation Information does not include a |
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||||||
requirement to continue to provide support service, warranty, or updates |
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||||||
for a work that has been modified or installed by the recipient, or for |
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the User Product in which it has been modified or installed. Access to a |
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||||||
network may be denied when the modification itself materially and |
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||||||
adversely affects the operation of the network or violates the rules and |
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protocols for communication across the network. |
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||||||
Corresponding Source conveyed, and Installation Information provided, |
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||||||
in accord with this section must be in a format that is publicly |
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||||||
documented (and with an implementation available to the public in |
|
||||||
source code form), and must require no special password or key for |
|
||||||
unpacking, reading or copying. |
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||||||
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|
||||||
7. Additional Terms. |
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||||||
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|
||||||
"Additional permissions" are terms that supplement the terms of this |
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||||||
License by making exceptions from one or more of its conditions. |
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||||||
Additional permissions that are applicable to the entire Program shall |
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||||||
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||||||
that they are valid under applicable law. If additional permissions |
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||||||
apply only to part of the Program, that part may be used separately |
|
||||||
under those permissions, but the entire Program remains governed by |
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||||||
this License without regard to the additional permissions. |
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||||||
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|
||||||
When you convey a copy of a covered work, you may at your option |
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||||||
remove any additional permissions from that copy, or from any part of |
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||||||
it. (Additional permissions may be written to require their own |
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Notwithstanding any other provision of this License, for material you |
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||||||
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||||||
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||||||
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|
||||||
a) Disclaiming warranty or limiting liability differently from the |
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||||||
terms of sections 15 and 16 of this License; or |
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||||||
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|
||||||
b) Requiring preservation of specified reasonable legal notices or |
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||||||
author attributions in that material or in the Appropriate Legal |
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||||||
Notices displayed by works containing it; or |
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any liability that these contractual assumptions directly impose on |
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All other non-permissive additional terms are considered "further |
|
||||||
restrictions" within the meaning of section 10. If the Program as you |
|
||||||
received it, or any part of it, contains a notice stating that it is |
|
||||||
governed by this License along with a term that is a further |
|
||||||
restriction, you may remove that term. If a license document contains |
|
||||||
a further restriction but permits relicensing or conveying under this |
|
||||||
License, you may add to a covered work material governed by the terms |
|
||||||
of that license document, provided that the further restriction does |
|
||||||
not survive such relicensing or conveying. |
|
||||||
|
|
||||||
If you add terms to a covered work in accord with this section, you |
|
||||||
must place, in the relevant source files, a statement of the |
|
||||||
additional terms that apply to those files, or a notice indicating |
|
||||||
where to find the applicable terms. |
|
||||||
|
|
||||||
Additional terms, permissive or non-permissive, may be stated in the |
|
||||||
form of a separately written license, or stated as exceptions; |
|
||||||
the above requirements apply either way. |
|
||||||
|
|
||||||
8. Termination. |
|
||||||
|
|
||||||
You may not propagate or modify a covered work except as expressly |
|
||||||
provided under this License. Any attempt otherwise to propagate or |
|
||||||
modify it is void, and will automatically terminate your rights under |
|
||||||
this License (including any patent licenses granted under the third |
|
||||||
paragraph of section 11). |
|
||||||
|
|
||||||
However, if you cease all violation of this License, then your |
|
||||||
license from a particular copyright holder is reinstated (a) |
|
||||||
provisionally, unless and until the copyright holder explicitly and |
|
||||||
finally terminates your license, and (b) permanently, if the copyright |
|
||||||
holder fails to notify you of the violation by some reasonable means |
|
||||||
prior to 60 days after the cessation. |
|
||||||
|
|
||||||
Moreover, your license from a particular copyright holder is |
|
||||||
reinstated permanently if the copyright holder notifies you of the |
|
||||||
violation by some reasonable means, this is the first time you have |
|
||||||
received notice of violation of this License (for any work) from that |
|
||||||
copyright holder, and you cure the violation prior to 30 days after |
|
||||||
your receipt of the notice. |
|
||||||
|
|
||||||
Termination of your rights under this section does not terminate the |
|
||||||
licenses of parties who have received copies or rights from you under |
|
||||||
this License. If your rights have been terminated and not permanently |
|
||||||
reinstated, you do not qualify to receive new licenses for the same |
|
||||||
material under section 10. |
|
||||||
|
|
||||||
9. Acceptance Not Required for Having Copies. |
|
||||||
|
|
||||||
You are not required to accept this License in order to receive or |
|
||||||
run a copy of the Program. Ancillary propagation of a covered work |
|
||||||
occurring solely as a consequence of using peer-to-peer transmission |
|
||||||
to receive a copy likewise does not require acceptance. However, |
|
||||||
nothing other than this License grants you permission to propagate or |
|
||||||
modify any covered work. These actions infringe copyright if you do |
|
||||||
not accept this License. Therefore, by modifying or propagating a |
|
||||||
covered work, you indicate your acceptance of this License to do so. |
|
||||||
|
|
||||||
10. Automatic Licensing of Downstream Recipients. |
|
||||||
|
|
||||||
Each time you convey a covered work, the recipient automatically |
|
||||||
receives a license from the original licensors, to run, modify and |
|
||||||
propagate that work, subject to this License. You are not responsible |
|
||||||
for enforcing compliance by third parties with this License. |
|
||||||
|
|
||||||
An "entity transaction" is a transaction transferring control of an |
|
||||||
organization, or substantially all assets of one, or subdividing an |
|
||||||
organization, or merging organizations. If propagation of a covered |
|
||||||
work results from an entity transaction, each party to that |
|
||||||
transaction who receives a copy of the work also receives whatever |
|
||||||
licenses to the work the party's predecessor in interest had or could |
|
||||||
give under the previous paragraph, plus a right to possession of the |
|
||||||
Corresponding Source of the work from the predecessor in interest, if |
|
||||||
the predecessor has it or can get it with reasonable efforts. |
|
||||||
|
|
||||||
You may not impose any further restrictions on the exercise of the |
|
||||||
rights granted or affirmed under this License. For example, you may |
|
||||||
not impose a license fee, royalty, or other charge for exercise of |
|
||||||
rights granted under this License, and you may not initiate litigation |
|
||||||
(including a cross-claim or counterclaim in a lawsuit) alleging that |
|
||||||
any patent claim is infringed by making, using, selling, offering for |
|
||||||
sale, or importing the Program or any portion of it. |
|
||||||
|
|
||||||
11. Patents. |
|
||||||
|
|
||||||
A "contributor" is a copyright holder who authorizes use under this |
|
||||||
License of the Program or a work on which the Program is based. The |
|
||||||
work thus licensed is called the contributor's "contributor version". |
|
||||||
|
|
||||||
A contributor's "essential patent claims" are all patent claims |
|
||||||
owned or controlled by the contributor, whether already acquired or |
|
||||||
hereafter acquired, that would be infringed by some manner, permitted |
|
||||||
by this License, of making, using, or selling its contributor version, |
|
||||||
but do not include claims that would be infringed only as a |
|
||||||
consequence of further modification of the contributor version. For |
|
||||||
purposes of this definition, "control" includes the right to grant |
|
||||||
patent sublicenses in a manner consistent with the requirements of |
|
||||||
this License. |
|
||||||
|
|
||||||
Each contributor grants you a non-exclusive, worldwide, royalty-free |
|
||||||
patent license under the contributor's essential patent claims, to |
|
||||||
make, use, sell, offer for sale, import and otherwise run, modify and |
|
||||||
propagate the contents of its contributor version. |
|
||||||
|
|
||||||
In the following three paragraphs, a "patent license" is any express |
|
||||||
agreement or commitment, however denominated, not to enforce a patent |
|
||||||
(such as an express permission to practice a patent or covenant not to |
|
||||||
sue for patent infringement). To "grant" such a patent license to a |
|
||||||
party means to make such an agreement or commitment not to enforce a |
|
||||||
patent against the party. |
|
||||||
|
|
||||||
If you convey a covered work, knowingly relying on a patent license, |
|
||||||
and the Corresponding Source of the work is not available for anyone |
|
||||||
to copy, free of charge and under the terms of this License, through a |
|
||||||
publicly available network server or other readily accessible means, |
|
||||||
then you must either (1) cause the Corresponding Source to be so |
|
||||||
available, or (2) arrange to deprive yourself of the benefit of the |
|
||||||
patent license for this particular work, or (3) arrange, in a manner |
|
||||||
consistent with the requirements of this License, to extend the patent |
|
||||||
license to downstream recipients. "Knowingly relying" means you have |
|
||||||
actual knowledge that, but for the patent license, your conveying the |
|
||||||
covered work in a country, or your recipient's use of the covered work |
|
||||||
in a country, would infringe one or more identifiable patents in that |
|
||||||
country that you have reason to believe are valid. |
|
||||||
|
|
||||||
If, pursuant to or in connection with a single transaction or |
|
||||||
arrangement, you convey, or propagate by procuring conveyance of, a |
|
||||||
covered work, and grant a patent license to some of the parties |
|
||||||
receiving the covered work authorizing them to use, propagate, modify |
|
||||||
or convey a specific copy of the covered work, then the patent license |
|
||||||
you grant is automatically extended to all recipients of the covered |
|
||||||
work and works based on it. |
|
||||||
|
|
||||||
A patent license is "discriminatory" if it does not include within |
|
||||||
the scope of its coverage, prohibits the exercise of, or is |
|
||||||
conditioned on the non-exercise of one or more of the rights that are |
|
||||||
specifically granted under this License. You may not convey a covered |
|
||||||
work if you are a party to an arrangement with a third party that is |
|
||||||
in the business of distributing software, under which you make payment |
|
||||||
to the third party based on the extent of your activity of conveying |
|
||||||
the work, and under which the third party grants, to any of the |
|
||||||
parties who would receive the covered work from you, a discriminatory |
|
||||||
patent license (a) in connection with copies of the covered work |
|
||||||
conveyed by you (or copies made from those copies), or (b) primarily |
|
||||||
for and in connection with specific products or compilations that |
|
||||||
contain the covered work, unless you entered into that arrangement, |
|
||||||
or that patent license was granted, prior to 28 March 2007. |
|
||||||
|
|
||||||
Nothing in this License shall be construed as excluding or limiting |
|
||||||
any implied license or other defenses to infringement that may |
|
||||||
otherwise be available to you under applicable patent law. |
|
||||||
|
|
||||||
12. No Surrender of Others' Freedom. |
|
||||||
|
|
||||||
If conditions are imposed on you (whether by court order, agreement or |
|
||||||
otherwise) that contradict the conditions of this License, they do not |
|
||||||
excuse you from the conditions of this License. If you cannot convey a |
|
||||||
covered work so as to satisfy simultaneously your obligations under this |
|
||||||
License and any other pertinent obligations, then as a consequence you may |
|
||||||
not convey it at all. For example, if you agree to terms that obligate you |
|
||||||
to collect a royalty for further conveying from those to whom you convey |
|
||||||
the Program, the only way you could satisfy both those terms and this |
|
||||||
License would be to refrain entirely from conveying the Program. |
|
||||||
|
|
||||||
13. Use with the GNU Affero General Public License. |
|
||||||
|
|
||||||
Notwithstanding any other provision of this License, you have |
|
||||||
permission to link or combine any covered work with a work licensed |
|
||||||
under version 3 of the GNU Affero General Public License into a single |
|
||||||
combined work, and to convey the resulting work. The terms of this |
|
||||||
License will continue to apply to the part which is the covered work, |
|
||||||
but the special requirements of the GNU Affero General Public License, |
|
||||||
section 13, concerning interaction through a network will apply to the |
|
||||||
combination as such. |
|
||||||
|
|
||||||
14. Revised Versions of this License. |
|
||||||
|
|
||||||
The Free Software Foundation may publish revised and/or new versions of |
|
||||||
the GNU General Public License from time to time. Such new versions will |
|
||||||
be similar in spirit to the present version, but may differ in detail to |
|
||||||
address new problems or concerns. |
|
||||||
|
|
||||||
Each version is given a distinguishing version number. If the |
|
||||||
Program specifies that a certain numbered version of the GNU General |
|
||||||
Public License "or any later version" applies to it, you have the |
|
||||||
option of following the terms and conditions either of that numbered |
|
||||||
version or of any later version published by the Free Software |
|
||||||
Foundation. If the Program does not specify a version number of the |
|
||||||
GNU General Public License, you may choose any version ever published |
|
||||||
by the Free Software Foundation. |
|
||||||
|
|
||||||
If the Program specifies that a proxy can decide which future |
|
||||||
versions of the GNU General Public License can be used, that proxy's |
|
||||||
public statement of acceptance of a version permanently authorizes you |
|
||||||
to choose that version for the Program. |
|
||||||
|
|
||||||
Later license versions may give you additional or different |
|
||||||
permissions. However, no additional obligations are imposed on any |
|
||||||
author or copyright holder as a result of your choosing to follow a |
|
||||||
later version. |
|
||||||
|
|
||||||
15. Disclaimer of Warranty. |
|
||||||
|
|
||||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY |
|
||||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT |
|
||||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY |
|
||||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, |
|
||||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
||||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM |
|
||||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF |
|
||||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
|
||||||
|
|
||||||
16. Limitation of Liability. |
|
||||||
|
|
||||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
|
||||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS |
|
||||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY |
|
||||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE |
|
||||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF |
|
||||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD |
|
||||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), |
|
||||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF |
|
||||||
SUCH DAMAGES. |
|
||||||
|
|
||||||
17. Interpretation of Sections 15 and 16. |
|
||||||
|
|
||||||
If the disclaimer of warranty and limitation of liability provided |
|
||||||
above cannot be given local legal effect according to their terms, |
|
||||||
reviewing courts shall apply local law that most closely approximates |
|
||||||
an absolute waiver of all civil liability in connection with the |
|
||||||
Program, unless a warranty or assumption of liability accompanies a |
|
||||||
copy of the Program in return for a fee. |
|
||||||
|
|
||||||
END OF TERMS AND CONDITIONS |
|
||||||
|
|
||||||
How to Apply These Terms to Your New Programs |
|
||||||
|
|
||||||
If you develop a new program, and you want it to be of the greatest |
|
||||||
possible use to the public, the best way to achieve this is to make it |
|
||||||
free software which everyone can redistribute and change under these terms. |
|
||||||
|
|
||||||
To do so, attach the following notices to the program. It is safest |
|
||||||
to attach them to the start of each source file to most effectively |
|
||||||
state the exclusion of warranty; and each file should have at least |
|
||||||
the "copyright" line and a pointer to where the full notice is found. |
|
||||||
|
|
||||||
<one line to give the program's name and a brief idea of what it does.> |
|
||||||
Copyright (C) <year> <name of author> |
|
||||||
|
|
||||||
This program is free software: you can redistribute it and/or modify |
|
||||||
it under the terms of the GNU General Public License as published by |
|
||||||
the Free Software Foundation, either version 3 of the License, or |
|
||||||
(at your option) any later version. |
|
||||||
|
|
||||||
This program is distributed in the hope that it will be useful, |
|
||||||
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
||||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
||||||
GNU General Public License for more details. |
|
||||||
|
|
||||||
You should have received a copy of the GNU General Public License |
|
||||||
along with this program. If not, see <https://www.gnu.org/licenses/>. |
|
||||||
|
|
||||||
Also add information on how to contact you by electronic and paper mail. |
|
||||||
|
|
||||||
If the program does terminal interaction, make it output a short |
|
||||||
notice like this when it starts in an interactive mode: |
|
||||||
|
|
||||||
<program> Copyright (C) <year> <name of author> |
|
||||||
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. |
|
||||||
This is free software, and you are welcome to redistribute it |
|
||||||
under certain conditions; type `show c' for details. |
|
||||||
|
|
||||||
The hypothetical commands `show w' and `show c' should show the appropriate |
|
||||||
parts of the General Public License. Of course, your program's commands |
|
||||||
might be different; for a GUI interface, you would use an "about box". |
|
||||||
|
|
||||||
You should also get your employer (if you work as a programmer) or school, |
|
||||||
if any, to sign a "copyright disclaimer" for the program, if necessary. |
|
||||||
For more information on this, and how to apply and follow the GNU GPL, see |
|
||||||
<https://www.gnu.org/licenses/>. |
|
||||||
|
|
||||||
The GNU General Public License does not permit incorporating your program |
|
||||||
into proprietary programs. If your program is a subroutine library, you |
|
||||||
may consider it more useful to permit linking proprietary applications with |
|
||||||
the library. If this is what you want to do, use the GNU Lesser General |
|
||||||
Public License instead of this License. But first, please read |
|
||||||
<https://www.gnu.org/licenses/why-not-lgpl.html>. |
|
Before Width: | Height: | Size: 36 KiB |
@ -1,86 +0,0 @@ |
|||||||
#version 430 |
|
||||||
#extension GL_ARB_gpu_shader_fp64 : enable |
|
||||||
|
|
||||||
#define MAX_SEGMENTS 32 |
|
||||||
|
|
||||||
layout (local_size_x=MAX_SEGMENTS, local_size_y=1, local_size_z=1) in; |
|
||||||
|
|
||||||
layout(std430, binding = 0) buffer PositionBuffer { |
|
||||||
dvec2 X[]; |
|
||||||
}; |
|
||||||
|
|
||||||
layout(std430, binding = 1) buffer VelocityBuffer { |
|
||||||
dvec2 V[]; |
|
||||||
}; |
|
||||||
|
|
||||||
layout(std430, binding = 2) buffer InverseMassBuffer { |
|
||||||
double W[]; |
|
||||||
}; |
|
||||||
|
|
||||||
layout(std430, binding = 3) buffer LengthBuffer { |
|
||||||
double L[]; |
|
||||||
}; |
|
||||||
|
|
||||||
layout(std430, binding = 4) buffer IndexBuffer { |
|
||||||
uint indices[]; |
|
||||||
}; |
|
||||||
|
|
||||||
layout(std430, binding = 5) buffer SegmentCountBuffer { |
|
||||||
uint segmentCounts[]; |
|
||||||
}; |
|
||||||
|
|
||||||
uniform double h; |
|
||||||
uniform double gravity; |
|
||||||
uniform uint substeps; |
|
||||||
|
|
||||||
shared dvec2 P[MAX_SEGMENTS]; |
|
||||||
|
|
||||||
// distance constraint |
|
||||||
void solveConstraint(uint segmentId, uint gIndex){ |
|
||||||
double w1 = segmentId == 0 ? 0.0 : W[gIndex - 1]; |
|
||||||
double w2 = W[gIndex]; |
|
||||||
|
|
||||||
dvec2 s = (segmentId == 0 ? dvec2(0, 0) : P[segmentId - 1]) - P[segmentId]; |
|
||||||
dvec2 n = normalize(s); |
|
||||||
double l = length(s); |
|
||||||
|
|
||||||
dvec2 deltaP1 = n * -w1 / (w1 + w2) * (l - L[gIndex]); |
|
||||||
dvec2 deltaP2 = n * w2 / (w1 + w2) * (l - L[gIndex]); |
|
||||||
|
|
||||||
if (segmentId > 0) |
|
||||||
P[segmentId - 1] += deltaP1; |
|
||||||
P[segmentId] += deltaP2; |
|
||||||
} |
|
||||||
|
|
||||||
// No need for synchronization, because each pendulum gets its own warp |
|
||||||
void main() { |
|
||||||
uint pendulumId = gl_WorkGroupID.x; |
|
||||||
uint i_off = indices[pendulumId]; |
|
||||||
uint segmentCount = segmentCounts[pendulumId]; |
|
||||||
uint localId = gl_LocalInvocationID.x; |
|
||||||
uint gIndex = i_off + localId; |
|
||||||
|
|
||||||
// discard unneeded local threads for segments |
|
||||||
if (localId >= segmentCount) |
|
||||||
return; |
|
||||||
|
|
||||||
// substepping is not parallelizable |
|
||||||
for (int k = 0; k < substeps; k++){ |
|
||||||
|
|
||||||
// explicit integration with gravity as external force |
|
||||||
V[gIndex] = V[gIndex] + dvec2(0, -gravity * h); |
|
||||||
P[localId] = X[gIndex] + V[gIndex] * h; |
|
||||||
|
|
||||||
// every segment depends on its neighbour, so we can not parallelize all constraints |
|
||||||
// only parallelize those, who are independent of each other, skipping every second segment |
|
||||||
if (localId % 2 == 0){ |
|
||||||
solveConstraint(localId, i_off + localId); |
|
||||||
if (localId + 1 < segmentCount) |
|
||||||
solveConstraint(localId + 1, gIndex + 1); |
|
||||||
} |
|
||||||
|
|
||||||
// update position and velocity |
|
||||||
V[gIndex] = (P[localId] - X[gIndex]) / h; |
|
||||||
X[gIndex] = P[localId]; |
|
||||||
} |
|
||||||
} |
|
@ -1,21 +0,0 @@ |
|||||||
#version 330 core |
|
||||||
|
|
||||||
out vec4 FragColor; |
|
||||||
|
|
||||||
in vec3 color; |
|
||||||
|
|
||||||
uniform bool drawPoints; |
|
||||||
|
|
||||||
void main() { |
|
||||||
if (drawPoints){ |
|
||||||
vec2 coord = gl_PointCoord - vec2(0.5); |
|
||||||
if (length(coord) > 0.5) |
|
||||||
discard; |
|
||||||
if (length(coord) > 0.4) |
|
||||||
FragColor = vec4(1, 1, 1, 1); |
|
||||||
else |
|
||||||
FragColor = vec4(0, 0, 0, 1); |
|
||||||
} else { |
|
||||||
FragColor = vec4(color, 1); |
|
||||||
} |
|
||||||
} |
|
@ -1,11 +0,0 @@ |
|||||||
#version 330 core |
|
||||||
|
|
||||||
out vec4 FragColor; |
|
||||||
|
|
||||||
in vec2 texCoord; |
|
||||||
|
|
||||||
uniform sampler2D quadTexture; |
|
||||||
|
|
||||||
void main() { |
|
||||||
FragColor = texture(quadTexture, texCoord); |
|
||||||
} |
|
@ -1,9 +0,0 @@ |
|||||||
<RCC> |
|
||||||
<qresource prefix="/shaders/"> |
|
||||||
<file>vertex_pendula.glsl</file> |
|
||||||
<file>fragment_pendula.glsl</file> |
|
||||||
<file>vertex_quad.glsl</file> |
|
||||||
<file>fragment_quad.glsl</file> |
|
||||||
<file>compute.glsl</file> |
|
||||||
</qresource> |
|
||||||
</RCC> |
|
@ -1,27 +0,0 @@ |
|||||||
#version 330 core |
|
||||||
|
|
||||||
layout (location = 0) in vec3 vPos; |
|
||||||
layout (location = 1) in vec3 vColor; |
|
||||||
layout (location = 2) in float vMassRadius; |
|
||||||
|
|
||||||
uniform mat3 VP; |
|
||||||
|
|
||||||
uniform bool drawPoints; |
|
||||||
uniform int simulationSizePixels; |
|
||||||
uniform float simulationSizeMeters; |
|
||||||
uniform float depthOffset; |
|
||||||
|
|
||||||
out vec3 color; |
|
||||||
|
|
||||||
void main() { |
|
||||||
gl_Position = vec4(VP * vPos, 1.0); |
|
||||||
if (drawPoints){ |
|
||||||
// Points always on top of neighbouring lines |
|
||||||
gl_Position.z -= depthOffset * 0.5; |
|
||||||
|
|
||||||
// PointSize is diameter in Pixels |
|
||||||
gl_PointSize = vMassRadius / simulationSizeMeters * simulationSizePixels * 2; |
|
||||||
} else { |
|
||||||
color = vColor; |
|
||||||
} |
|
||||||
} |
|
@ -1,11 +0,0 @@ |
|||||||
#version 330 core |
|
||||||
|
|
||||||
layout (location = 0) in vec2 vPos; |
|
||||||
layout (location = 1) in vec2 vTex; |
|
||||||
|
|
||||||
out vec2 texCoord; |
|
||||||
|
|
||||||
void main() { |
|
||||||
gl_Position = vec4(vPos, 0, 1); |
|
||||||
texCoord = vTex; |
|
||||||
} |
|
@ -1,42 +1,19 @@ |
|||||||
#pragma once |
|
||||||
|
|
||||||
#include <QOpenGLWidget> |
#include <QOpenGLWidget> |
||||||
#include <QOpenGLFunctions_3_3_Core> |
#include <QOpenGLFunctions> |
||||||
#include <QMatrix3x3> |
|
||||||
|
|
||||||
|
|
||||||
class Pendulum; |
|
||||||
class Simulation; |
class Simulation; |
||||||
class QOpenGLShaderProgram; |
class FPS; |
||||||
class Overlay; |
|
||||||
|
|
||||||
class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions_3_3_Core { |
class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions { |
||||||
public: |
public: |
||||||
explicit GLWidget(Simulation *); |
explicit GLWidget(Simulation *); |
||||||
Overlay * overlay; |
|
||||||
protected: |
protected: |
||||||
|
void paintEvent(QPaintEvent* e) override; |
||||||
void timerEvent(QTimerEvent* e) override; |
void timerEvent(QTimerEvent* e) override; |
||||||
void initializeGL() override; |
|
||||||
void paintGL() override; |
|
||||||
void resizeGL(int w, int h) override; |
|
||||||
public slots: |
|
||||||
void showMassesChanged(int state); |
|
||||||
private slots: |
|
||||||
void uploadStaticDataToGPU(); |
|
||||||
void changePosition(); |
|
||||||
private: |
private: |
||||||
QOpenGLShaderProgram * pendulaProgram; |
|
||||||
GLuint VAO; |
|
||||||
GLuint positionVBO; |
|
||||||
GLuint colorVBO; |
|
||||||
GLuint massRadiiVBO; |
|
||||||
GLuint EBO; |
|
||||||
GLsizei indexCount = 0; |
|
||||||
GLsizei positionCount = 0; |
|
||||||
QMatrix3x3 VP; |
|
||||||
int simulationSizePixels; |
|
||||||
float depthOffset; |
|
||||||
bool showMasses; |
|
||||||
|
|
||||||
Simulation * simulation; |
Simulation * simulation; |
||||||
|
FPS * fps; |
||||||
static bool AnyDialogOpen(); |
static bool AnyDialogOpen(); |
||||||
}; |
}; |
@ -1,176 +0,0 @@ |
|||||||
#include "Overlay.h" |
|
||||||
#include "FPS.h" |
|
||||||
#include <QPainter> |
|
||||||
#include <QOpenGLShaderProgram> |
|
||||||
#include "Simulation.h" |
|
||||||
#include <iostream> |
|
||||||
#include <QOpenGLTexture> |
|
||||||
#include <sstream> |
|
||||||
#include <iomanip> |
|
||||||
|
|
||||||
Overlay::Overlay(Simulation * simulation) : simulation(simulation) { |
|
||||||
fps = new FPS; |
|
||||||
fps->setUpdateInterval(500); |
|
||||||
} |
|
||||||
|
|
||||||
void Overlay::init() { |
|
||||||
initializeOpenGLFunctions(); |
|
||||||
|
|
||||||
program = new QOpenGLShaderProgram; |
|
||||||
program->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/vertex_quad.glsl"); |
|
||||||
program->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/fragment_quad.glsl"); |
|
||||||
program->link(); |
|
||||||
|
|
||||||
float quadVertices[] = { |
|
||||||
-1, 1, 0, 1, // top left
|
|
||||||
-1, -1, 0, 0, // bottom left
|
|
||||||
1, -1, 1, 0, // bottom right
|
|
||||||
1, 1, 1, 1 // top right
|
|
||||||
}; |
|
||||||
|
|
||||||
GLuint indices[] = { |
|
||||||
0, 1, 2, 2, 3, 0 |
|
||||||
}; |
|
||||||
|
|
||||||
glGenVertexArrays(1, &VAO); |
|
||||||
glBindVertexArray(VAO); |
|
||||||
|
|
||||||
GLuint VBO; |
|
||||||
glGenBuffers(1, &VBO); |
|
||||||
glBindBuffer(GL_ARRAY_BUFFER, VBO); |
|
||||||
glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), quadVertices, GL_STATIC_DRAW); |
|
||||||
|
|
||||||
GLuint EBO; |
|
||||||
glGenBuffers(1, &EBO); |
|
||||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO); |
|
||||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); |
|
||||||
|
|
||||||
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), nullptr); |
|
||||||
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (GLvoid*) (2 * sizeof(float))); |
|
||||||
glEnableVertexAttribArray(0); |
|
||||||
glEnableVertexAttribArray(1); |
|
||||||
|
|
||||||
glBindVertexArray(0); |
|
||||||
} |
|
||||||
|
|
||||||
void Overlay::draw() { |
|
||||||
int w = viewportSize.width(); |
|
||||||
int h = (viewportSize.height() - simulationRect.height()) / 2; |
|
||||||
|
|
||||||
// Top HUD with Energy Plot
|
|
||||||
{ |
|
||||||
glViewport(0, viewportSize.height() - h, w, h); |
|
||||||
|
|
||||||
QImage hud(w, h, QImage::Format_RGBA8888); |
|
||||||
hud.fill(Qt::transparent); |
|
||||||
|
|
||||||
QPainter p(&hud); |
|
||||||
p.setPen(Qt::white); |
|
||||||
auto font = p.font(); |
|
||||||
font.setPixelSize(15); |
|
||||||
p.setFont(font); |
|
||||||
|
|
||||||
auto m = p.fontMetrics(); |
|
||||||
|
|
||||||
double pot = simulation->potentialEnergy; |
|
||||||
double kin = simulation->kineticEnergy; |
|
||||||
double total = pot + kin; |
|
||||||
|
|
||||||
QColor empty(50, 50, 50); |
|
||||||
QColor full(80, 80, 80); |
|
||||||
|
|
||||||
// Total energy bar
|
|
||||||
{ |
|
||||||
double lossPercentage = (1 - total / energyLimit) * 100; |
|
||||||
|
|
||||||
std::stringstream text; |
|
||||||
text << std::fixed << std::setprecision(0) << "Total Energy: " << total << " J"; |
|
||||||
text << " --- "; |
|
||||||
text << "Loss: " << std::setprecision(1) << lossPercentage << " %"; |
|
||||||
QString totalText = QString::fromStdString(text.str()); |
|
||||||
|
|
||||||
int x = int(total / energyLimit * w); |
|
||||||
|
|
||||||
p.fillRect(0, 0, w, h / 2, empty); |
|
||||||
p.fillRect(0, 0, x, h / 2, full); |
|
||||||
p.drawLine(x, 0, x, h / 2); |
|
||||||
p.drawText(0, 0, w, h / 2, Qt::AlignCenter | Qt::AlignVCenter, totalText); |
|
||||||
} |
|
||||||
|
|
||||||
// Split energy bar
|
|
||||||
{ |
|
||||||
int potX = total == 0 ? int(0.5 * w) : int(pot / total * w); |
|
||||||
p.fillRect(0, h / 2, w, h / 2, empty); |
|
||||||
p.fillRect(0, h / 2, potX, h / 2, full); |
|
||||||
|
|
||||||
std::stringstream text; |
|
||||||
text << std::fixed << std::setprecision(0) << "Potential: " << pot << " J"; |
|
||||||
QString potText = QString::fromStdString(text.str()); |
|
||||||
|
|
||||||
text = std::stringstream(); |
|
||||||
text << std::fixed << std::setprecision(0) << "Kinetic: " << kin << " J"; |
|
||||||
QString kinText = QString::fromStdString(text.str()); |
|
||||||
|
|
||||||
int textWidth1 = m.horizontalAdvance(potText); |
|
||||||
int textWidth2 = m.horizontalAdvance(kinText); |
|
||||||
int x1 = (w - textWidth1) / 4; |
|
||||||
int x2 = (w - textWidth2) / 4 * 3; |
|
||||||
|
|
||||||
p.drawLine(potX, h / 2, potX, h); |
|
||||||
p.drawText(x1, h / 2, textWidth1, h / 2, Qt::AlignCenter | Qt::AlignVCenter, potText); |
|
||||||
p.drawText(x2, h / 2, textWidth2, h / 2, Qt::AlignCenter | Qt::AlignVCenter, kinText); |
|
||||||
} |
|
||||||
|
|
||||||
p.drawLine(0, 0, w, 0); |
|
||||||
p.drawLine(0, h / 2, w, h / 2); |
|
||||||
p.drawLine(0, h - 1, w, h - 1); |
|
||||||
|
|
||||||
drawTexture(&hud); |
|
||||||
} |
|
||||||
|
|
||||||
// Bottom HUD with FPS and UPS
|
|
||||||
{ |
|
||||||
glViewport(0, 0, w, h); |
|
||||||
|
|
||||||
QImage hud(w, h, QImage::Format_RGBA8888); |
|
||||||
|
|
||||||
// Background
|
|
||||||
hud.fill(Qt::transparent); |
|
||||||
|
|
||||||
QPainter p(&hud); |
|
||||||
|
|
||||||
// FPS
|
|
||||||
{ |
|
||||||
p.setPen(Qt::white); |
|
||||||
auto font = p.font(); |
|
||||||
font.setPixelSize(15); |
|
||||||
p.setFont(font); |
|
||||||
fps->newFrame(); |
|
||||||
std::stringstream text; |
|
||||||
text << "FPS: " << fps->current << "\n"; |
|
||||||
text << "UPS: " << simulation->ups->current; |
|
||||||
p.drawText(0, 0, 100, h, Qt::AlignBottom | Qt::AlignLeft, QString::fromStdString(text.str())); |
|
||||||
} |
|
||||||
drawTexture(&hud); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
void Overlay::resize(QSize newViewportSize, QRect newSimulationRect) { |
|
||||||
viewportSize = newViewportSize; |
|
||||||
simulationRect = newSimulationRect; |
|
||||||
} |
|
||||||
|
|
||||||
void Overlay::drawTexture(QImage *image) { |
|
||||||
glBindVertexArray(VAO); |
|
||||||
program->bind(); |
|
||||||
|
|
||||||
QOpenGLTexture texture(image->mirrored()); |
|
||||||
texture.bind(); |
|
||||||
|
|
||||||
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr); |
|
||||||
} |
|
||||||
|
|
||||||
void Overlay::resetEnergyLimit() { |
|
||||||
simulation->updateEnergy(); |
|
||||||
energyLimit = simulation->kineticEnergy + simulation->potentialEnergy; |
|
||||||
} |
|
@ -1,29 +0,0 @@ |
|||||||
#include <QRect> |
|
||||||
|
|
||||||
#include <QOpenGLExtraFunctions> |
|
||||||
|
|
||||||
class QOpenGLWidget; |
|
||||||
class FPS; |
|
||||||
class QOpenGLShaderProgram; |
|
||||||
class QOpenGLTexture; |
|
||||||
class Simulation; |
|
||||||
|
|
||||||
class Overlay : public QObject, protected QOpenGLExtraFunctions { |
|
||||||
Q_OBJECT |
|
||||||
|
|
||||||
FPS * fps; |
|
||||||
QSize viewportSize; |
|
||||||
QRect simulationRect; |
|
||||||
QOpenGLShaderProgram * program; |
|
||||||
GLuint VAO; |
|
||||||
void drawTexture(QImage *image); |
|
||||||
Simulation * simulation; |
|
||||||
double energyLimit = 0; |
|
||||||
public slots: |
|
||||||
void resetEnergyLimit(); |
|
||||||
public: |
|
||||||
explicit Overlay(Simulation *); |
|
||||||
void init(); |
|
||||||
void draw(); |
|
||||||
void resize(QSize newViewportSize, QRect newSimulationRect); |
|
||||||
}; |
|
@ -1,23 +1,20 @@ |
|||||||
#pragma once |
|
||||||
|
|
||||||
#include <vector> |
#include <vector> |
||||||
#include <QVector2D> |
#include <QVector2D> |
||||||
#include <QColor> |
#include <QColor> |
||||||
#include "Vector.h" |
#include "Vector.h" |
||||||
|
|
||||||
class GLWidget; |
class QPainter; |
||||||
|
|
||||||
class Pendulum { |
class Pendulum { |
||||||
public: |
public: |
||||||
explicit Pendulum(const std::vector<double> &M, |
explicit Pendulum(const std::vector<double> &M, |
||||||
const std::vector<double> &L, |
const std::vector<double> &L, |
||||||
QColor color, double startAngle); |
QColor color, double startAngle); |
||||||
|
|
||||||
|
void draw(QPainter*, double) const; |
||||||
void update(double, double); |
void update(double, double); |
||||||
double potentialEnergy(double gravity) const; |
|
||||||
double kineticEnergy() const; |
|
||||||
private: |
private: |
||||||
friend class GLWidget; |
|
||||||
friend class Simulation; |
|
||||||
std::vector<Vector> X, V; |
std::vector<Vector> X, V; |
||||||
std::vector<double> M, L; |
std::vector<double> M, L; |
||||||
QColor color; |
QColor color; |
||||||
|
@ -1,259 +1,55 @@ |
|||||||
#include "Simulation.h" |
#include "Simulation.h" |
||||||
|
#include "Pendulum.h" |
||||||
#include <QPainter> |
#include <QPainter> |
||||||
#include <QTimer> |
#include <QTimer> |
||||||
#include <QThread> |
#include <QThread> |
||||||
#include <omp.h> |
#include <omp.h> |
||||||
#include <iostream> |
#include <iostream> |
||||||
#include "FPS.h" |
|
||||||
#include "Pendulum.h" |
|
||||||
#include <QOpenGLContext> |
|
||||||
#include <QOpenGLShaderProgram> |
|
||||||
#include <QOffscreenSurface> |
|
||||||
|
|
||||||
Simulation::Simulation() { |
Simulation::Simulation() { |
||||||
ups = new FPS; |
|
||||||
ups->setUpdateInterval(100); |
|
||||||
timer = new QTimer(this); |
timer = new QTimer(this); |
||||||
QTimer::connect(timer, &QTimer::timeout, this, &Simulation::update); |
QTimer::connect(timer, &QTimer::timeout, this, &Simulation::update); |
||||||
timer->setInterval(updateInterval); |
timer->setInterval(updateInterval); |
||||||
timer->start(); |
timer->start(); |
||||||
|
lastUpdate = system_clock::now(); |
||||||
}; |
}; |
||||||
|
|
||||||
void Simulation::initialize() { |
void Simulation::draw(QPainter *p, int screenSize) { |
||||||
|
double scale = screenSize * 0.95 / size; |
||||||
// OpenGL Offscreen functions
|
|
||||||
{ |
|
||||||
context = new QOpenGLContext; |
|
||||||
auto format = QSurfaceFormat::defaultFormat(); |
|
||||||
format.setVersion(4, 3); |
|
||||||
context->setFormat(format); |
|
||||||
context->create(); |
|
||||||
context->makeCurrent(offSurface); |
|
||||||
f = new QOpenGLFunctions_4_3_Core; |
|
||||||
if (!f->initializeOpenGLFunctions()){ |
|
||||||
std::string message = "OpenGL 4.3 is required for Compute Shaders! Falling back to CPU-Multithreading."; |
|
||||||
printf("%s\n", message.c_str()); |
|
||||||
useGPUAcceleration = false; |
|
||||||
emit gpuNotSupported(message); |
|
||||||
} else if (!context->hasExtension("GL_ARB_gpu_shader_fp64")){ |
|
||||||
std::string message = "Double precision not supported by OpenGL! Falling back to CPU-Multithreading."; |
|
||||||
printf("%s\n", message.c_str()); |
|
||||||
useGPUAcceleration = false; |
|
||||||
emit gpuNotSupported(message); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
if (!useGPUAcceleration){ |
|
||||||
context->doneCurrent(); |
|
||||||
return; |
|
||||||
} |
|
||||||
|
|
||||||
|
|
||||||
// Read GPU Limits
|
|
||||||
{ |
|
||||||
for (int i = 0; i < 3; i++){ |
|
||||||
f->glGetIntegeri_v(GL_MAX_COMPUTE_WORK_GROUP_COUNT, i, gpuLimits.maxWGCount + i); |
|
||||||
f->glGetIntegeri_v(GL_MAX_COMPUTE_WORK_GROUP_SIZE, i, gpuLimits.maxWGSize + i); |
|
||||||
} |
|
||||||
f->glGetIntegerv(GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS, &gpuLimits.maxWGInvocations); |
|
||||||
|
|
||||||
printf("Max work group count: (%d, %d, %d)\n", gpuLimits.maxWGCount[0], gpuLimits.maxWGCount[1], gpuLimits.maxWGCount[2]); |
|
||||||
printf("Max work group size: (%d, %d, %d)\n", gpuLimits.maxWGSize[0], gpuLimits.maxWGSize[1], gpuLimits.maxWGSize[2]); |
|
||||||
printf("Max work group invocations (x * y * z): %d\n", gpuLimits.maxWGInvocations); |
|
||||||
} |
|
||||||
|
|
||||||
// Shader
|
|
||||||
{ |
|
||||||
program = new QOpenGLShaderProgram; |
|
||||||
program->addShaderFromSourceFile(QOpenGLShader::Compute, ":/shaders/compute.glsl"); |
|
||||||
program->link(); |
|
||||||
|
|
||||||
f->glGenBuffers(6, &SSBO.positions); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, SSBO.positions); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, SSBO.velocities); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, SSBO.invMasses); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, SSBO.lengths); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, SSBO.indices); |
|
||||||
f->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 5, SSBO.segmentCounts); |
|
||||||
} |
|
||||||
|
|
||||||
context->doneCurrent(); |
for (const auto pendulum : pendula) |
||||||
|
pendulum->draw(p, scale); |
||||||
} |
} |
||||||
|
|
||||||
// When the layout changes
|
|
||||||
void Simulation::updateGPUData() { |
|
||||||
context->makeCurrent(offSurface); |
|
||||||
|
|
||||||
std::vector<GLdouble> positions; |
|
||||||
std::vector<GLdouble> velocities; |
|
||||||
std::vector<GLdouble> invMasses; |
|
||||||
std::vector<GLdouble> lengths; |
|
||||||
std::vector<GLuint> indices; |
|
||||||
std::vector<GLuint> segmentCounts; |
|
||||||
|
|
||||||
GLuint currentIndex = 0; |
|
||||||
for (const Pendulum * p : pendula){ |
|
||||||
indices.push_back(currentIndex); |
|
||||||
currentIndex += p->X.size(); |
|
||||||
segmentCounts.push_back(p->X.size()); |
|
||||||
for (size_t i = 0; i < p->X.size(); i++){ |
|
||||||
positions.push_back(p->X[i].x); |
|
||||||
positions.push_back(p->X[i].y); |
|
||||||
velocities.push_back(p->V[i].x); |
|
||||||
velocities.push_back(p->V[i].y); |
|
||||||
invMasses.push_back(1.0 / p->M[i]); |
|
||||||
lengths.push_back(p->L[i]); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
auto posSize = GLsizeiptr(positions.size() * sizeof(GLdouble)); |
|
||||||
auto velSize = GLsizeiptr(velocities.size() * sizeof(GLdouble)); |
|
||||||
auto invMassSize = GLsizeiptr(invMasses.size() * sizeof(GLdouble)); |
|
||||||
auto lengthSize = GLsizeiptr(lengths.size() * sizeof(GLdouble)); |
|
||||||
auto indicesSize = GLsizeiptr(indices.size() * sizeof(GLuint)); |
|
||||||
auto segmentCountsSize = GLsizeiptr(segmentCounts.size() * sizeof(GLuint)); |
|
||||||
|
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.positions); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, posSize, positions.data(), GL_DYNAMIC_DRAW); |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.velocities); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, velSize, velocities.data(), GL_DYNAMIC_DRAW); |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.invMasses); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, invMassSize, invMasses.data(), GL_STATIC_DRAW); |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.lengths); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, lengthSize, lengths.data(), GL_STATIC_DRAW); |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.indices); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, indicesSize, indices.data(), GL_STATIC_DRAW); |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.segmentCounts); |
|
||||||
f->glBufferData(GL_SHADER_STORAGE_BUFFER, segmentCountsSize, segmentCounts.data(), GL_STATIC_DRAW); |
|
||||||
|
|
||||||
context->doneCurrent(); |
|
||||||
} |
|
||||||
|
|
||||||
// Every few milliseconds
|
|
||||||
void Simulation::update() { |
void Simulation::update() { |
||||||
|
auto thisUpdate = system_clock::now(); |
||||||
|
auto ms = (int)duration_cast<milliseconds>(thisUpdate - lastUpdate).count(); |
||||||
|
lastUpdate = thisUpdate; |
||||||
|
|
||||||
if (!isPlaying) |
if (!isPlaying) |
||||||
return; |
return; |
||||||
|
|
||||||
ups->newFrame(); |
double h = (timescale * updateInterval) / 1000; |
||||||
|
|
||||||
double h = (timescale * updateInterval) / 1000 / substeps; |
|
||||||
|
|
||||||
semaphore.acquire(); |
|
||||||
|
|
||||||
double newPotentialEnergy = 0; |
h /= substeps; |
||||||
double newKineticEnergy = 0; |
|
||||||
|
|
||||||
if (useGPUAcceleration) { |
#pragma omp parallel for |
||||||
context->makeCurrent(offSurface); |
for (int i = 0; i < pendula.size(); i++) // NOLINT(*-loop-convert) // no ranged based for msvc
|
||||||
program->bind(); |
for (int k = 0; k < substeps; k++) |
||||||
f->glUniform1d(program->uniformLocation("h"), h); |
pendula[i]->update(h, gravity); |
||||||
f->glUniform1d(program->uniformLocation("gravity"), gravity); |
|
||||||
f->glUniform1ui(program->uniformLocation("substeps"), substeps); |
|
||||||
|
|
||||||
f->glDispatchCompute(pendula.size(), 1, 1); |
|
||||||
f->glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT); |
|
||||||
|
|
||||||
// Read updated positions
|
|
||||||
{ |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.positions); |
|
||||||
auto * newPositions = (double*) f->glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_READ_ONLY); |
|
||||||
int index = 0; |
|
||||||
for (Pendulum * p : pendula){ |
|
||||||
for (Vector &point : p->X){ |
|
||||||
point.x = newPositions[index++]; |
|
||||||
point.y = newPositions[index++]; |
|
||||||
} |
|
||||||
} |
|
||||||
f->glUnmapBuffer(GL_SHADER_STORAGE_BUFFER); |
|
||||||
} |
|
||||||
|
|
||||||
// Read updated velocities
|
|
||||||
{ |
|
||||||
f->glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO.velocities); |
|
||||||
auto * newVelocities = (double*) f->glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_READ_ONLY); |
|
||||||
int index = 0; |
|
||||||
for (Pendulum * p : pendula){ |
|
||||||
for (Vector &velocity : p->V){ |
|
||||||
velocity.x = newVelocities[index++]; |
|
||||||
velocity.y = newVelocities[index++]; |
|
||||||
} |
|
||||||
} |
|
||||||
f->glUnmapBuffer(GL_SHADER_STORAGE_BUFFER); |
|
||||||
} |
|
||||||
|
|
||||||
#pragma omp parallel for |
|
||||||
for (int i = 0; i < pendula.size(); i++){ // NOLINT(*-loop-convert) not ranged based for msvc
|
|
||||||
double localPotentialEnergy = pendula[i]->potentialEnergy(gravity); |
|
||||||
double localKineticEnergy = pendula[i]->kineticEnergy(); |
|
||||||
#pragma omp atomic |
|
||||||
newPotentialEnergy += localPotentialEnergy; |
|
||||||
#pragma omp atomic |
|
||||||
newKineticEnergy += localKineticEnergy; |
|
||||||
} |
|
||||||
context->doneCurrent(); |
|
||||||
} else { |
|
||||||
// CPU-Multithreading
|
|
||||||
#pragma omp parallel for |
|
||||||
for (int i = 0; i < pendula.size(); i++){ // NOLINT(*-loop-convert) not ranged based for msvc
|
|
||||||
for (int k = 0; k < substeps; k++) |
|
||||||
pendula[i]->update(h, gravity); |
|
||||||
double localPotentialEnergy = pendula[i]->potentialEnergy(gravity); |
|
||||||
double localKineticEnergy = pendula[i]->kineticEnergy(); |
|
||||||
#pragma omp atomic |
|
||||||
newPotentialEnergy += localPotentialEnergy; |
|
||||||
#pragma omp atomic |
|
||||||
newKineticEnergy += localKineticEnergy; |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
potentialEnergy = newPotentialEnergy; |
|
||||||
kineticEnergy = newKineticEnergy; |
|
||||||
|
|
||||||
emit positionChanged(); |
|
||||||
} |
} |
||||||
|
|
||||||
void Simulation::clearPendula() { |
void Simulation::clearPendula() { |
||||||
semaphore.acquire(); |
auto deleteLater = pendula; |
||||||
|
|
||||||
for (Pendulum* &p : pendula){ |
|
||||||
delete p; |
|
||||||
p = nullptr; |
|
||||||
} |
|
||||||
|
|
||||||
pendula.clear(); |
pendula.clear(); |
||||||
pendula.shrink_to_fit(); |
pendula.shrink_to_fit(); |
||||||
|
QThread::usleep(500000); |
||||||
updateEnergy(); |
for (auto p : deleteLater) |
||||||
if (useGPUAcceleration) |
delete p; |
||||||
updateGPUData(); |
|
||||||
|
|
||||||
emit layoutChanged(); |
|
||||||
} |
} |
||||||
|
|
||||||
void Simulation::addPendula(const std::vector<Pendulum *> &add) { |
void Simulation::addPendula(const std::vector<Pendulum *> &add) { |
||||||
semaphore.acquire(); |
|
||||||
|
|
||||||
for (auto p : add) |
for (auto p : add) |
||||||
pendula.push_back(p); |
pendula.push_back(p); |
||||||
|
|
||||||
updateEnergy(); |
|
||||||
if (useGPUAcceleration) |
|
||||||
updateGPUData(); |
|
||||||
|
|
||||||
emit layoutChanged(); |
|
||||||
} |
|
||||||
|
|
||||||
void Simulation::updateEnergy() { |
|
||||||
potentialEnergy = kineticEnergy = 0; |
|
||||||
for (auto p : pendula){ |
|
||||||
potentialEnergy += p->potentialEnergy(gravity); |
|
||||||
kineticEnergy += p->kineticEnergy(); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
void Simulation::useGPUChanged(int state) { |
|
||||||
useGPUAcceleration = state == Qt::Checked; |
|
||||||
if (useGPUAcceleration) |
|
||||||
updateGPUData(); |
|
||||||
} |
} |
||||||
|
|
||||||
|
@ -1,26 +1,21 @@ |
|||||||
#include <QApplication> |
#include <QApplication> |
||||||
#include <QSurfaceFormat> |
#include <QSurfaceFormat> |
||||||
#include "MainWindow.h" |
#include "MainWindow.h" |
||||||
#include <QIcon> |
#include <omp.h> |
||||||
#include <QThread> |
#include <chrono> |
||||||
|
#include <iostream> |
||||||
|
|
||||||
int main(int argc, char* argv[]) { |
using namespace std::chrono; |
||||||
QSurfaceFormat fmt = QSurfaceFormat::defaultFormat(); |
|
||||||
fmt.setDepthBufferSize(24); |
|
||||||
fmt.setSamples(8); |
|
||||||
fmt.setSwapInterval(1); |
|
||||||
fmt.setVersion(3, 3); |
|
||||||
fmt.setProfile(QSurfaceFormat::CoreProfile); |
|
||||||
QSurfaceFormat::setDefaultFormat(fmt); |
|
||||||
|
|
||||||
|
int main(int argc, char* argv[]) { |
||||||
QApplication app(argc, argv); |
QApplication app(argc, argv); |
||||||
|
|
||||||
|
QSurfaceFormat fmt; |
||||||
|
fmt.setSamples(4); |
||||||
|
QSurfaceFormat::setDefaultFormat(fmt); |
||||||
|
|
||||||
MainWindow w; |
MainWindow w; |
||||||
w.setWindowTitle("Pendulum Laboratory"); |
|
||||||
w.setWindowIcon(QIcon(":/icons/app_icon.ico")); |
|
||||||
w.show(); |
w.show(); |
||||||
|
|
||||||
w.simulationThread->start(); |
|
||||||
|
|
||||||
return QApplication::exec(); |
return QApplication::exec(); |
||||||
} |
} |
||||||
|
Loading…
Reference in new issue