Update main.yml

Also changed the license to GPLv3

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+name: Verify Addon
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+    
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      BLENDER_VERSION: blender-4.2.0-beta+v42.d19d23e91f65-linux.x86_64-release
+    steps:
+      - name: Set derived environment variables
+        run: |
+          echo "BLENDER_FILENAME=${{ env.BLENDER_VERSION }}.tar.xz" >> $GITHUB_ENV
+          echo "BLENDER_URL=https://cdn.builder.blender.org/download/daily/${{ env.BLENDER_VERSION }}.tar.xz" >> $GITHUB_ENV
+      - name: Install Blender Dependencies
+        run: |
+          apt install libxxf86vm-dev -y
+          apt install libxfixes3 -y
+          apt install libxi-dev -y
+          apt install libxkbcommon-x11-0 -y
+          apt install libgl1-mesa-glx -y
+      - name: Download Blender
+        run: |
+          wget $BLENDER_URL
+          tar -xvzf $BLENDER_FILENAME
+          rm -rf $BLENDER_FILENAME
+      - uses: actions/checkout@v3

COPYING

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+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.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  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>.

README.md

@@ -5,12 +5,15 @@
 
 This Blender addon allows you to import and export meshes and animations to and from the [PSK and PSA file formats](https://wiki.beyondunreal.com/PSK_%26_PSA_file_formats) used in many versions of the Unreal Engine.
 
-## Compatibility
+This software is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.html) license.
+
+# Compatibility
 
 | Blender Version | Addon Version | Long Term Support |
-|--------------------------------------------------------------|--------------------------------------------------------------------------------|-------------------|
+|-|-|-|
-| 4.0+                                                         | [latest](https://github.com/DarklightGames/io_scene_psk_psa/releases/latest)   | TBD               |
+| [4.1](https://www.blender.org/download/releases/4-1/) | [latest](https://github.com/DarklightGames/io_scene_psk_psa/releases/latest)   | TBD |
-| [3.4 - 3.6](https://www.blender.org/download/lts/3-6/)       | [5.0.5](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/5.0.5) | ✅️ June 2025      |
+| [4.0](https://www.blender.org/download/releases/4-0/) | [6.2.1](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/6.2.1) | TBD |
+| [3.4 - 3.6](https://www.blender.org/download/lts/3-6/) | [5.0.6](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/5.0.6) | ✅️ June 2025 |
 | [2.93 - 3.3](https://www.blender.org/download/releases/3-3/) | [4.3.0](https://github.com/DarklightGames/io_scene_psk_psa/releases/tag/4.3.0) | ✅️ September 2024 |
 
 Bug fixes will be issued for legacy addon versions that are under [Blender's LTS maintenance period](https://www.blender.org/download/lts/). Once the LTS period has ended, legacy addon versions will no longer be supported by the maintainers of this repository, although we will accept pull requests for bug fixes. 

build.py

@@ -1,41 +0,0 @@
-import os
-import subprocess
-from fnmatch import fnmatch
-from zipfile import ZipFile, ZIP_DEFLATED
-
-ignore_patterns = [
-    '*/__pycache__/*',
-    '*/.git/*',
-    '*/.github/*',
-    '*/.idea/*',
-    '*/venv/*',
-    '*/.gitignore',
-    '*/.gitattributes',
-    '*/build/*',
-    '*/build.py',
-]
-
-
-def zipdir(path, zip_file: ZipFile):
-    for root, dirs, files in os.walk(path):
-        for file in files:
-            if file != zip_file.filename and not any(fnmatch(os.path.join(root, file), pattern) for pattern in ignore_patterns):
-                zip_file.write(os.path.join(root, file))
-
-# Get the branch name.
-branch = subprocess.check_output(['git', 'rev-parse', '--abbrev-ref', 'HEAD']).decode('utf-8').strip()
-
-# Get the most recent tag.
-tag = subprocess.check_output(['git', 'describe', '--tags', '--abbrev=0']).decode('utf-8').strip()
-
-# Create a zip file of the current directory.
-
-zip_path = f'./build/io_scene_psk_psa-{branch}-{tag}.zip'
-
-# Check that the directory exists, if it doesn't, create it.
-if not os.path.exists('./build'):
-    os.makedirs('./build')
-
-zipf = ZipFile(zip_path, 'w', ZIP_DEFLATED)
-zipdir('.', zipf)
-zipf.close()

io_scene_psk_psa/__init__.py

@@ -1,23 +1,11 @@
 from bpy.app.handlers import persistent
 
-bl_info = {
-    'name': 'PSK/PSA Importer/Exporter',
-    'author': 'Colin Basnett, Yurii Ti',
-    'version': (6, 2, 0),
-    'blender': (4, 0, 0),
-    'description': 'PSK/PSA Import/Export (.psk/.psa)',
-    'warning': '',
-    'doc_url': 'https://github.com/DarklightGames/io_scene_psk_psa',
-    'tracker_url': 'https://github.com/DarklightGames/io_scene_psk_psa/issues',
-    'category': 'Import-Export'
-}
-
 if 'bpy' in locals():
     import importlib
 
-    importlib.reload(psx_data)
+    importlib.reload(shared_data)
-    importlib.reload(psx_helpers)
+    importlib.reload(shared_helpers)
-    importlib.reload(psx_types)
+    importlib.reload(shared_types)
 
     importlib.reload(psk_data)
     importlib.reload(psk_reader)
@@ -44,39 +32,30 @@ if 'bpy' in locals():
     importlib.reload(psa_import_operators)
     importlib.reload(psa_import_ui)
 else:
-    # if i remove this line, it can be enabled just fine
+    from .shared import data as shared_data, types as shared_types, helpers as shared_helpers
-    from . import data as psx_data
+    from .psk import data as psk_data, builder as psk_builder, writer as psk_writer, \
-    from . import helpers as psx_helpers
+    importer as psk_importer, properties as psk_properties
-    from . import types as psx_types
+    from .psk import reader as psk_reader, ui as psk_ui
-    from .psk import data as psk_data
+    from .psk.export import properties as psk_export_properties, ui as psk_export_ui, \
-    from .psk import reader as psk_reader
+        operators as psk_export_operators
-    from .psk import writer as psk_writer
-    from .psk import builder as psk_builder
-    from .psk import importer as psk_importer
-    from .psk import properties as psk_properties
-    from .psk import ui as psk_ui
-    from .psk.export import properties as psk_export_properties
-    from .psk.export import operators as psk_export_operators
-    from .psk.export import ui as psk_export_ui
     from .psk.import_ import operators as psk_import_operators
 
-    from .psa import data as psa_data
+    from .psa import config as psa_config, data as psa_data, writer as psa_writer, reader as psa_reader, \
-    from .psa import config as psa_config
+        builder as psa_builder, importer as psa_importer
-    from .psa import reader as psa_reader
+    from .psa.export import properties as psa_export_properties, ui as psa_export_ui, \
-    from .psa import writer as psa_writer
+        operators as psa_export_operators
-    from .psa import builder as psa_builder
-    from .psa import importer as psa_importer
-    from .psa.export import properties as psa_export_properties
-    from .psa.export import operators as psa_export_operators
-    from .psa.export import ui as psa_export_ui
-    from .psa.import_ import properties as psa_import_properties
     from .psa.import_ import operators as psa_import_operators
-    from .psa.import_ import ui as psa_import_ui
+    from .psa.import_ import ui as psa_import_ui, properties as psa_import_properties
 
 import bpy
 from bpy.props import PointerProperty
 
-classes = psx_types.classes +\
+# TODO: just here so that it's not unreferenced and removed on save.
+if [shared_data, shared_helpers, psk_data, psk_reader, psk_writer, psk_builder, psk_importer, psa_data, psa_config,
+    psa_reader, psa_writer, psa_builder, psa_importer]:
+    pass
+
+classes = shared_types.classes +\
           psk_properties.classes +\
           psk_ui.classes +\
           psk_import_operators.classes +\
@@ -118,7 +97,7 @@ def register():
     bpy.types.Scene.psa_import = PointerProperty(type=psa_import_properties.PSA_PG_import)
     bpy.types.Scene.psa_export = PointerProperty(type=psa_export_properties.PSA_PG_export)
     bpy.types.Scene.psk_export = PointerProperty(type=psk_export_properties.PSK_PG_export)
-    bpy.types.Action.psa_export = PointerProperty(type=psx_types.PSX_PG_action_export)
+    bpy.types.Action.psa_export = PointerProperty(type=shared_types.PSX_PG_action_export)
 
 
 def unregister():

io_scene_psk_psa/blender_manifest.toml

@@ -0,0 +1,24 @@
+schema_version = "1.0.0"
+id = "io_scene_psk_psa"
+version = "7.1.0"
+name = "Unreal Mesh & Animation (.psk/.psa)"
+tagline = "Import and export PSK and PSA files used in Unreal Engine"
+maintainer = "Colin Basnett <cmbasnett@gmail.com>"
+type = "add-on"
+website = "https://github.com/DarklightGames/io_scene_psk_psa/"
+tags = ["Game Engine", "Import-Export"]
+blender_version_min = "4.2.0"
+# Optional: maximum supported Blender version
+# blender_version_max = "5.1.0"
+license = [
+  "SPDX:GPL-3.0-or-later",
+]
+
+[build]
+paths_exclude_pattern = [
+  "/.git/",
+  "__pycache__/",
+  "/venv/",
+  "/.github/",
+  ".gitignore",
+]

io_scene_psk_psa/psa/builder.py

@@ -3,7 +3,7 @@ from typing import Optional
 from bpy.types import Armature, Bone, Action, PoseBone
 
 from .data import *
-from ..helpers import *
+from ..shared.helpers import *
 
 
 class PsaBuildSequence:

io_scene_psk_psa/psa/data.py

@@ -2,7 +2,7 @@ import typing
 from collections import OrderedDict
 from typing import List
 
-from ..data import *
+from ..shared.data import *
 
 '''
 Note that keys are not stored within the Psa object.
@@ -58,27 +58,7 @@ class Psa:
         def __repr__(self) -> str:
             return repr((self.location, self.rotation, self.time))
 
-    class ScaleKey(Structure):
-        _fields_ = [
-            ('scale', Vector3),
-            ('time', c_float)
-        ]
-
-        @property
-        def data(self):
-            yield self.scale.x
-            yield self.scale.y
-            yield self.scale.z
-
-        def __repr__(self) -> str:
-            return repr((self.scale, self.time))
-
     def __init__(self):
         self.bones: List[Psa.Bone] = []
         self.sequences: typing.OrderedDict[str, Psa.Sequence] = OrderedDict()
         self.keys: List[Psa.Key] = []
-        self.scale_keys: List[Psa.ScaleKey] = []
-
-    @property
-    def has_scale_keys(self):
-        return len(self.scale_keys) > 0

io_scene_psk_psa/psa/export/operators.py

@@ -11,7 +11,7 @@ from bpy_types import Operator
 from .properties import PSA_PG_export, PSA_PG_export_action_list_item, filter_sequences
 from ..builder import build_psa, PsaBuildSequence, PsaBuildOptions
 from ..writer import write_psa
-from ...helpers import populate_bone_collection_list, get_nla_strips_in_frame_range
+from ...shared.helpers import populate_bone_collection_list, get_nla_strips_in_frame_range
 
 
 def is_action_for_armature(armature: Armature, action: Action):
@@ -62,7 +62,7 @@ def update_actions_and_timeline_markers(context: Context, armature: Armature):
         for pose_marker_index, pose_marker in enumerate(pose_markers):
             if pose_marker.name.strip() == '' or pose_marker.name.startswith('#'):
                 continue
-            for (name, frame_start, frame_end) in get_sequences_from_action_pose_marker(action, pose_markers, pose_marker, pose_marker_index):
+            for (name, frame_start, frame_end) in get_sequences_from_action_pose_markers(action, pose_markers, pose_marker, pose_marker_index):
                 item = pg.action_list.add()
                 item.action = action
                 item.name = name
@@ -188,13 +188,18 @@ def get_sequences_from_action(action: Action) -> List[Tuple[str, int, int]]:
     return get_sequences_from_name_and_frame_range(action.name, frame_start, frame_end)
 
 
-def get_sequences_from_action_pose_marker(action: Action, pose_markers: List[TimelineMarker], pose_marker: TimelineMarker, pose_marker_index: int) -> List[Tuple[str, int, int]]:
+def get_sequences_from_action_pose_markers(action: Action, pose_markers: List[TimelineMarker], pose_marker: TimelineMarker, pose_marker_index: int) -> List[Tuple[str, int, int]]:
     frame_start = pose_marker.frame
-    if pose_marker_index + 1 < len(pose_markers):
+    sequence_name = pose_marker.name
+    if pose_marker.name.startswith('!'):
+        # If the pose marker name starts with an exclamation mark, only export the first frame.
+        frame_end = frame_start
+        sequence_name = sequence_name[1:]
+    elif pose_marker_index + 1 < len(pose_markers):
         frame_end = pose_markers[pose_marker_index + 1].frame
     else:
         frame_end = int(action.frame_range[1])
-    return get_sequences_from_name_and_frame_range(pose_marker.name, frame_start, frame_end)
+    return get_sequences_from_name_and_frame_range(sequence_name, frame_start, frame_end)
 
 
 def get_visible_sequences(pg: PSA_PG_export, sequences) -> List[PSA_PG_export_action_list_item]:
@@ -391,6 +396,8 @@ class PSA_OT_export(Operator, ExportHelper):
                 export_sequence.nla_state.frame_start = nla_strip_item.frame_start
                 export_sequence.nla_state.frame_end = nla_strip_item.frame_end
                 export_sequence.fps = get_sequence_fps(context, pg.fps_source, pg.fps_custom, [nla_strip_item.action])
+                export_sequence.compression_ratio = nla_strip_item.action.psa_export.compression_ratio
+                export_sequence.key_quota = nla_strip_item.action.psa_export.key_quota
                 export_sequences.append(export_sequence)
         else:
             raise ValueError(f'Unhandled sequence source: {pg.sequence_source}')

io_scene_psk_psa/psa/export/properties.py

@@ -7,7 +7,7 @@ from bpy.props import BoolProperty, PointerProperty, EnumProperty, FloatProperty
     StringProperty
 from bpy.types import PropertyGroup, Object, Action, AnimData, Context
 
-from ...types import PSX_PG_bone_collection_list_item
+from ...shared.types import PSX_PG_bone_collection_list_item
 
 
 def psa_export_property_group_animation_data_override_poll(_context, obj):
@@ -44,12 +44,13 @@ class PSA_PG_export_nla_strip_list_item(PropertyGroup):
 
 def nla_track_update_cb(self: 'PSA_PG_export', context: Context) -> None:
     self.nla_strip_list.clear()
-    if context.object is None or context.object.animation_data is None:
-        return
     match = re.match(r'^(\d+).+$', self.nla_track)
     self.nla_track_index = int(match.group(1)) if match else -1
     if self.nla_track_index >= 0:
-        nla_track = context.object.animation_data.nla_tracks[self.nla_track_index]
+        animation_data = get_animation_data(self, context)
+        if animation_data is None:
+            return
+        nla_track = animation_data.nla_tracks[self.nla_track_index]
         for nla_strip in nla_track.strips:
             strip: PSA_PG_export_nla_strip_list_item = self.nla_strip_list.add()
             strip.action = nla_strip.action

io_scene_psk_psa/psa/import_/operators.py

@@ -153,7 +153,6 @@ class PSA_OT_import(Operator, ImportHelper):
         options.should_overwrite = pg.should_overwrite
         options.should_write_metadata = pg.should_write_metadata
         options.should_write_keyframes = pg.should_write_keyframes
-        options.should_write_scale_keys = pg.should_write_scale_keys
         options.should_convert_to_samples = pg.should_convert_to_samples
         options.bone_mapping_mode = pg.bone_mapping_mode
         options.fps_source = pg.fps_source
@@ -234,7 +233,6 @@ class PSA_OT_import(Operator, ImportHelper):
             col.use_property_decorate = False
             col.prop(pg, 'should_write_keyframes')
             col.prop(pg, 'should_write_metadata')
-            col.prop(pg, 'should_write_scale_keys')
 
             if pg.should_write_keyframes:
                 col = col.column(heading='Keyframes')

io_scene_psk_psa/psa/import_/properties.py

@@ -47,8 +47,6 @@ class PSA_PG_import(PropertyGroup):
                                    description='If an action with a matching name already exists, the existing action '
                                                'will have it\'s data overwritten instead of a new action being created')
     should_write_keyframes: BoolProperty(default=True, name='Keyframes', options=empty_set)
-    should_write_scale_keys: BoolProperty(default=True, name='Scale Keys', options=empty_set, description=
-                                        'Import scale keys, if available')
     should_write_metadata: BoolProperty(default=True, name='Metadata', options=empty_set,
                                         description='Additional data will be written to the custom properties of the '
                                                     'Action (e.g., frame rate)')
@@ -73,7 +71,8 @@ class PSA_PG_import(PropertyGroup):
             ('EXACT', 'Exact', 'Bone names must match exactly.', 'EXACT', 0),
             ('CASE_INSENSITIVE', 'Case Insensitive', 'Bones names must match, ignoring case (e.g., the bone PSA bone '
              '\'root\' can be mapped to the armature bone \'Root\')', 'CASE_INSENSITIVE', 1),
-        )
+        ),
+        default='CASE_INSENSITIVE'
     )
     fps_source: EnumProperty(name='FPS Source', items=(
         ('SEQUENCE', 'Sequence', 'The sequence frame rate matches the original frame rate', 'ACTION', 0),
@@ -90,6 +89,20 @@ class PSA_PG_import(PropertyGroup):
         soft_max=60.0,
         step=100,
     )
+    compression_ratio_source: EnumProperty(name='Compression Ratio Source', items=(
+        ('ACTION', 'Action', 'The compression ratio is sourced from the action metadata', 'ACTION', 0),
+        ('CUSTOM', 'Custom', 'The compression ratio is set to a custom value', 1),
+    ))
+    compression_ratio_custom: FloatProperty(
+        default=1.0,
+        name='Custom Compression Ratio',
+        description='The compression ratio to apply to the imported sequences',
+        options=empty_set,
+        min=0.0,
+        soft_min=0.0,
+        soft_max=1.0,
+        step=0.0625,
+    )
 
 
 def filter_sequences(pg: PSA_PG_import, sequences) -> List[int]:

io_scene_psk_psa/psa/import_/ui.py

@@ -4,7 +4,7 @@ from bpy.types import UIList
 from .properties import filter_sequences
 
 
-class PSA_UL_sequences(UIList):
+class PSA_UL_sequences_mixin(UIList):
     def draw_item(self, context, layout, data, item, icon, active_data, active_property, index, flt_flag):
         row = layout.row(align=True)
         split = row.split(align=True, factor=0.75)
@@ -30,11 +30,15 @@ class PSA_UL_sequences(UIList):
         return flt_flags, flt_neworder
 
 
-class PSA_UL_import_sequences(PSA_UL_sequences, UIList):
+class PSA_UL_sequences(PSA_UL_sequences_mixin):
     pass
 
 
-class PSA_UL_import_actions(PSA_UL_sequences, UIList):
+class PSA_UL_import_sequences(PSA_UL_sequences_mixin):
+    pass
+
+
+class PSA_UL_import_actions(PSA_UL_sequences_mixin):
     pass
 
 

io_scene_psk_psa/psa/importer.py

@@ -1,5 +1,5 @@
 import typing
-from typing import List, Optional, Iterable
+from typing import List, Optional
 
 import bpy
 import numpy as np
@@ -19,7 +19,6 @@ class PsaImportOptions(object):
         self.should_overwrite = False
         self.should_write_keyframes = True
         self.should_write_metadata = True
-        self.should_write_scale_keys = True
         self.action_name_prefix = ''
         self.should_convert_to_samples = False
         self.bone_mapping_mode = 'CASE_INSENSITIVE'
@@ -39,10 +38,9 @@ class ImportBone(object):
         self.original_rotation: Quaternion = Quaternion()
         self.post_rotation: Quaternion = Quaternion()
         self.fcurves: List[FCurve] = []
-        self.scale_fcurves: List[FCurve] = []
 
 
-def _calculate_fcurve_data(import_bone: ImportBone, key_data: Iterable[float]):
+def _calculate_fcurve_data(import_bone: ImportBone, key_data: typing.Iterable[float]):
     # Convert world-space transforms to local-space transforms.
     key_rotation = Quaternion(key_data[0:4])
     key_location = Vector(key_data[4:])
@@ -145,7 +143,7 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
         if armature_bone_index is not None:
             # Ensure that no other PSA bone has been mapped to this armature bone yet.
             if armature_bone_index not in armature_to_psa_bone_indices:
-                psa_to_armature_bone_indices[psa_bone_index] = armature_bone_names.index(psa_bone_name)
+                psa_to_armature_bone_indices[psa_bone_index] = armature_bone_index
                 armature_to_psa_bone_indices[armature_bone_index] = psa_bone_index
             else:
                 # This armature bone has already been mapped to a PSA bone.
@@ -174,7 +172,7 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
 
     # Create intermediate bone data for import operations.
     import_bones = []
-    import_bones_dict = dict()
+    psa_bone_names_to_import_bones = dict()
 
     for (psa_bone_index, psa_bone), psa_bone_name in zip(enumerate(psa_reader.bones), psa_bone_names):
         if psa_bone_index not in psa_to_armature_bone_indices:
@@ -184,17 +182,22 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
         import_bone = ImportBone(psa_bone)
         import_bone.armature_bone = armature_data.bones[psa_bone_name]
         import_bone.pose_bone = armature_object.pose.bones[psa_bone_name]
-        import_bones_dict[psa_bone_name] = import_bone
+        psa_bone_names_to_import_bones[psa_bone_name] = import_bone
         import_bones.append(import_bone)
 
+    bones_with_missing_parents = []
+
     for import_bone in filter(lambda x: x is not None, import_bones):
         armature_bone = import_bone.armature_bone
-
+        has_parent = armature_bone.parent is not None
-        if armature_bone.parent is not None and armature_bone.parent.name in psa_bone_names:
+        if has_parent:
-            import_bone.parent = import_bones_dict[armature_bone.parent.name]
+            if armature_bone.parent.name in psa_bone_names:
-
+                import_bone.parent = psa_bone_names_to_import_bones[armature_bone.parent.name]
+            else:
+                # Add a warning if the parent bone is not in the PSA.
+                bones_with_missing_parents.append(armature_bone)
         # Calculate the original location & rotation of each bone (in world-space maybe?)
-        if import_bone.parent is not None:
+        if has_parent:
             import_bone.original_location = armature_bone.matrix_local.translation - armature_bone.parent.matrix_local.translation
             import_bone.original_location.rotate(armature_bone.parent.matrix_local.to_quaternion().conjugated())
             import_bone.original_rotation = armature_bone.matrix_local.to_quaternion()
@@ -206,6 +209,12 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
 
         import_bone.post_rotation = import_bone.original_rotation.conjugated()
 
+    # Warn about bones with missing parents.
+    if len(bones_with_missing_parents) > 0:
+        count = len(bones_with_missing_parents)
+        message = f'{count} bone(s) have parents that are not present in the PSA:\n' + str([x.name for x in bones_with_missing_parents])
+        result.warnings.append(message)
+
     context.window_manager.progress_begin(0, len(sequences))
 
     # Create and populate the data for new sequences.
@@ -259,14 +268,6 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
                     action.fcurves.new(location_data_path, index=2, action_group=pose_bone.name) if add_location_fcurves else None,  # Lz
                 ]
 
-                if options.should_write_scale_keys:
-                    scale_data_path = pose_bone.path_from_id('scale')
-                    import_bone.fcurves += [
-                        action.fcurves.new(scale_data_path, index=0, action_group=pose_bone.name),  # Sx
-                        action.fcurves.new(scale_data_path, index=1, action_group=pose_bone.name),  # Sy
-                        action.fcurves.new(scale_data_path, index=2, action_group=pose_bone.name),  # Sz
-                    ]
-
             # Read the sequence data matrix from the PSA.
             sequence_data_matrix = psa_reader.read_sequence_data_matrix(sequence_name)
 
@@ -303,22 +304,6 @@ def import_psa(context: Context, psa_reader: PsaReader, armature_object: Object,
                     for fcurve_keyframe in fcurve.keyframe_points:
                         fcurve_keyframe.interpolation = 'LINEAR'
 
-            if options.should_write_scale_keys:
-                sequence_scale_data_matrix = psa_reader.read_sequence_scale_key_data_matrix(sequence_name)
-                # Write the scale keys out.
-                fcurve_data = numpy.zeros(2 * sequence.frame_count, dtype=float)
-                # Populate the keyframe time data.
-                fcurve_data[0::2] = [x * keyframe_time_dilation for x in range(sequence.frame_count)]
-                for bone_index, import_bone in enumerate(import_bones):
-                    if import_bone is None:
-                        continue
-                    for fcurve_index, fcurve in enumerate(import_bone.scale_fcurves):
-                        fcurve_data[1::2] = sequence_scale_data_matrix[:, bone_index, fcurve_index]
-                        fcurve.keyframe_points.add(sequence.frame_count)
-                        fcurve.keyframe_points.foreach_set('co', fcurve_data)
-                        for fcurve_keyframe in fcurve.keyframe_points:
-                            fcurve_keyframe.interpolation = 'LINEAR'
-
             if options.should_convert_to_samples:
                 # Bake the curve to samples.
                 for fcurve in action.fcurves:

io_scene_psk_psa/psa/reader.py

@@ -1,5 +1,4 @@
 import ctypes
-from typing import Optional
 
 import numpy as np
 
@@ -32,7 +31,6 @@ class PsaReader(object):
 
     def __init__(self, path):
         self.keys_data_offset: int = 0
-        self.scale_keys_data_offset: Optional[int] = None
         self.fp = open(path, 'rb')
         self.psa: Psa = self._read(self.fp)
 
@@ -66,9 +64,9 @@ class PsaReader(object):
         Reads and returns the key data for a sequence.
 
         @param sequence_name: The name of the sequence.
-        @return: A list of keys for the sequence.
+        @return: A list of Psa.Keys.
         """
-        # Set the file reader to the beginning of the key data.
+        # Set the file reader to the beginning of the keys data
         sequence = self.psa.sequences[sequence_name]
         data_size = sizeof(Psa.Key)
         bone_count = len(self.psa.bones)
@@ -84,49 +82,6 @@ class PsaReader(object):
             offset += data_size
         return keys
 
-    def read_sequence_scale_key_data_matrix(self, sequence_name: str) -> np.ndarray:
-        """
-        Reads and returns the scale key data matrix for the given sequence.
-        @param sequence_name: The name of the sequence.
-        @return: An FxBx3 matrix where F is the number of frames, B is the number of bones.
-        """
-        sequence = self.psa.sequences[sequence_name]
-        scale_keys = self.read_sequence_scale_keys(sequence_name)
-        bone_count = len(self.bones)
-        matrix_size = sequence.frame_count, bone_count, 3
-        matrix = np.ones(matrix_size)
-        keys_iter = iter(scale_keys)
-        for frame_index in range(sequence.frame_count):
-            for bone_index in range(bone_count):
-                matrix[frame_index, bone_index, :] = iter(next(keys_iter).scale)
-        return matrix
-
-    def read_sequence_scale_keys(self, sequence_name: str) -> List[Psa.ScaleKey]:
-        """
-        Reads and returns the scale key data for a sequence.
-
-        Throws a RuntimeError exception if the sequence does not contain scale keys (use Psa.has_scale_keys to check).
-        @param sequence_name: The name of the sequence.
-        @return: A list of scale keys for the sequence.
-        """
-        if not self.psa.has_scale_keys:
-            raise RuntimeError('The PSA file does not contain scale keys.')
-        # Set the file reader to the beginning of the key data.
-        sequence = self.psa.sequences[sequence_name]
-        data_size = sizeof(Psa.ScaleKey)
-        bone_count = len(self.psa.bones)
-        buffer_length = data_size * bone_count * sequence.frame_count
-        sequence_scale_keys_offset = self.keys_data_offset + (sequence.frame_start_index * bone_count * data_size)
-        self.fp.seek(sequence_scale_keys_offset, 0)
-        buffer = self.fp.read(buffer_length)
-        offset = 0
-        scale_keys = []
-        for _ in range(sequence.frame_count * bone_count):
-            scale_key = Psa.ScaleKey.from_buffer_copy(buffer, offset)
-            scale_keys.append(scale_key)
-            offset += data_size
-        return scale_keys
-
     @staticmethod
     def _read_types(fp, data_class, section: Section, data):
         buffer_length = section.data_size * section.data_count
@@ -156,10 +111,6 @@ class PsaReader(object):
                 # Skip keys on this pass. We will keep this file open and read from it as needed.
                 self.keys_data_offset = fp.tell()
                 fp.seek(section.data_size * section.data_count, 1)
-            elif section.name == b'SCALEKEYS':
-                # Skip scale keys on this pass. We will keep this file open and read from it as needed.
-                self.scale_keys_data_offset = fp.tell()
-                fp.seek(section.data_size * section.data_count, 1)
             else:
                 fp.seek(section.data_size * section.data_count, 1)
                 print(f'Unrecognized section in PSA: "{section.name}"')

io_scene_psk_psa/psa/writer.py

@@ -2,7 +2,7 @@ from ctypes import Structure, sizeof
 from typing import Type
 
 from .data import Psa
-from ..data import Section
+from ..shared.data import Section
 
 
 def write_section(fp, name: bytes, data_type: Type[Structure] = None, data: list = None):

io_scene_psk_psa/psk/builder.py

@@ -7,7 +7,7 @@ from bpy.types import Armature, Material
 
 from .data import *
 from .properties import triangle_type_and_bit_flags_to_poly_flags
-from ..helpers import *
+from ..shared.helpers import *
 
 
 class PskInputObjects(object):
@@ -28,10 +28,8 @@ class PskBuildOptions(object):
 def get_psk_input_objects(context) -> PskInputObjects:
     input_objects = PskInputObjects()
     for selected_object in context.view_layer.objects.selected:
-        if selected_object.type != 'MESH':
+        if selected_object.type == 'MESH':
-            raise RuntimeError(f'Selected object "{selected_object.name}" is not a mesh')
+            input_objects.mesh_objects.append(selected_object)
-
-    input_objects.mesh_objects = context.view_layer.objects.selected
 
     if len(input_objects.mesh_objects) == 0:
         raise RuntimeError('At least one mesh must be selected')

io_scene_psk_psa/psk/data.py

@@ -1,6 +1,6 @@
 from typing import List
 
-from ..data import *
+from ..shared.data import *
 
 
 class Psk(object):

io_scene_psk_psa/psk/export/operators.py

@@ -4,7 +4,7 @@ from bpy_extras.io_utils import ExportHelper
 
 from ..builder import build_psk, PskBuildOptions, get_psk_input_objects
 from ..writer import write_psk
-from ...helpers import populate_bone_collection_list
+from ...shared.helpers import populate_bone_collection_list
 
 
 def is_bone_filter_mode_item_available(context, identifier):
@@ -121,15 +121,17 @@ class PSK_OT_export(Operator, ExportHelper):
         pg = getattr(context.scene, 'psk_export')
 
         # MESH
-        box = layout.box()
+        mesh_header, mesh_panel = layout.panel('01_mesh', default_closed=False)
-        box.label(text='Mesh', icon='MESH_DATA')
+        mesh_header.label(text='Mesh', icon='MESH_DATA')
-        box.prop(pg, 'use_raw_mesh_data')
+        if mesh_panel:
+            mesh_panel.prop(pg, 'use_raw_mesh_data')
 
         # BONES
-        box = layout.box()
+        bones_header, bones_panel = layout.panel('02_bones', default_closed=False)
-        box.label(text='Bones', icon='BONE_DATA')
+        bones_header.label(text='Bones', icon='BONE_DATA')
+        if bones_panel:
             bone_filter_mode_items = pg.bl_rna.properties['bone_filter_mode'].enum_items_static
-        row = box.row(align=True)
+            row = bones_panel.row(align=True)
             for item in bone_filter_mode_items:
                 identifier = item.identifier
                 item_layout = row.row(align=True)
@@ -137,16 +139,17 @@ class PSK_OT_export(Operator, ExportHelper):
                 item_layout.enabled = is_bone_filter_mode_item_available(context, identifier)
 
             if pg.bone_filter_mode == 'BONE_COLLECTIONS':
-            row = box.row()
+                row = bones_panel.row()
                 rows = max(3, min(len(pg.bone_collection_list), 10))
                 row.template_list('PSX_UL_bone_collection_list', '', pg, 'bone_collection_list', pg, 'bone_collection_list_index', rows=rows)
 
-        box.prop(pg, 'should_enforce_bone_name_restrictions')
+            bones_panel.prop(pg, 'should_enforce_bone_name_restrictions')
 
         # MATERIALS
-        box = layout.box()
+        materials_header, materials_panel = layout.panel('03_materials', default_closed=False)
-        box.label(text='Materials', icon='MATERIAL')
+        materials_header.label(text='Materials', icon='MATERIAL')
-        row = box.row()
+        if materials_panel:
+            row = materials_panel.row()
             rows = max(3, min(len(pg.bone_collection_list), 10))
             row.template_list('PSK_UL_materials', '', pg, 'material_list', pg, 'material_list_index', rows=rows)
             col = row.column(align=True)

io_scene_psk_psa/psk/export/properties.py

@@ -1,7 +1,7 @@
 from bpy.props import EnumProperty, CollectionProperty, IntProperty, BoolProperty, PointerProperty
 from bpy.types import PropertyGroup, Material
 
-from ...types import PSX_PG_bone_collection_list_item
+from ...shared.types import PSX_PG_bone_collection_list_item
 
 empty_set = set()
 

io_scene_psk_psa/psk/importer.py

@@ -8,7 +8,7 @@ from mathutils import Quaternion, Vector, Matrix
 
 from .data import Psk
 from .properties import poly_flags_to_triangle_type_and_bit_flags
-from ..helpers import rgb_to_srgb, is_bdk_addon_loaded
+from ..shared.helpers import rgb_to_srgb, is_bdk_addon_loaded
 
 
 class PskImportOptions:
@@ -171,7 +171,7 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
 
         # TEXTURE COORDINATES
         uv_layer_data_index = 0
-        uv_layer = mesh_data.uv_layers.new(name='VTXW0000')
+        uv_layer = mesh_data.uv_layers.new(name='UVMap')
         for face_index, face in enumerate(psk.faces):
             if face_index in invalid_face_indices:
                 continue
@@ -231,7 +231,6 @@ def import_psk(psk: Psk, context, options: PskImportOptions) -> PskImportResult:
             for vertex_normal in psk.vertex_normals:
                 normals.append(tuple(vertex_normal))
             mesh_data.normals_split_custom_set_from_vertices(normals)
-            mesh_data.use_auto_smooth = True
         else:
             mesh_data.shade_smooth()
 

io_scene_psk_psa/psk/writer.py

@@ -2,7 +2,7 @@ from ctypes import Structure, sizeof
 from typing import Type
 
 from .data import Psk
-from ..data import Section, Vector3
+from ..shared.data import Section, Vector3
 
 MAX_WEDGE_COUNT = 65536
 MAX_POINT_COUNT = 4294967296

io_scene_psk_psa/shared/helpers.py

@@ -30,12 +30,12 @@ def get_nla_strips_in_frame_range(animation_data: AnimData, frame_min: float, fr
 
 
 def populate_bone_collection_list(armature_object: Object, bone_collection_list: bpy.props.CollectionProperty) -> None:
-    '''
+    """
     Updates the bone collections collection.
 
     Bone collection selections are preserved between updates unless none of the groups were previously selected;
     otherwise, all collections are selected by default.
-    '''
+    """
     has_selected_collections = any([g.is_selected for g in bone_collection_list])
     unassigned_collection_is_selected, selected_assigned_collection_names = True, []
 
@@ -84,7 +84,7 @@ def check_bone_names(bone_names: Iterable[str]):
 
 
 def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_collection_indices: List[int]) -> List[str]:
-    '''
+    """
     Returns a sorted list of bone indices that should be exported for the given bone filter mode and bone collections.
 
     Note that the ancestors of bones within the bone collections will also be present in the returned list.
@@ -93,7 +93,7 @@ def get_export_bone_names(armature_object: Object, bone_filter_mode: str, bone_c
     :param bone_filter_mode: One of ['ALL', 'BONE_COLLECTIONS']
     :param bone_collection_indices: List of bone collection indices to be exported.
     :return: A sorted list of bone indices that should be exported.
-    '''
+    """
     if armature_object is None or armature_object.type != 'ARMATURE':
         raise ValueError('An armature object must be supplied')