Fix error when picking up a node with deprecated tile definition (#40)

If `image` instead of `tile` was used, the mod passed nil to minetest.inventorycube.
The color field of a tile is now also supported (the code is used only for the particle image calculation).

.github/workflows/build.yml

@@ -0,0 +1,11 @@
+on: [push, pull_request]
+name: build
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: lint
+        uses: Roang-zero1/factorio-mod-luacheck@master
+        with:
+          luacheckrc_url: https://raw.githubusercontent.com/minetest-mods/item_drop/master/.luacheckrc

.luacheckrc

@@ -0,0 +1,19 @@
+unused_args = false
+allow_defined_top = true
+max_line_length = 999
+
+ignore = {
+    "name", "drops", "i",
+}
+
+globals = {
+    "minetest",
+}
+
+read_globals = {
+    string = {fields = {"split", "trim"}},
+    table = {fields = {"copy", "getn"}},
+
+    "vector", "ItemStack",
+    "dump",
+}

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+- The `master` branch should be stable to end-users at all times. It should target latest Minetest point release.
+- Put rewrites and new features in branches.
+- Conform with setting defaults so that end-user upgrades doesn't change expected in-game behavior. Discuss default changes in an issue if one really need to change.

LICENSE

@@ -0,0 +1,504 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+(This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.)
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
+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 this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+  To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights.  These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+  For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you.  You must make sure that they, too, receive or can get the source
+code.  If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it.  And you must show them these terms so they know their rights.
+
+  We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+  To protect each distributor, we want to make it very clear that
+there is no warranty for the free library.  Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+
+  Finally, software patents pose a constant threat to the existence of
+any free program.  We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder.  Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+  Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License.  This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License.  We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+  When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library.  The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom.  The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+  We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License.  It also provides other free software developers Less
+of an advantage over competing non-free programs.  These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries.  However, the Lesser license provides advantages in certain
+special circumstances.
+
+  For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard.  To achieve this, non-free programs must be
+allowed to use the library.  A more frequent case is that a free
+library does the same job as widely used non-free libraries.  In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+  In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software.  For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+  Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.  Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library".  The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+
+                  GNU LESSER GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+  A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+  The "Library", below, refers to any such software library or work
+which has been distributed under these terms.  A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language.  (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+  "Source code" for a work means the preferred form of the work for
+making modifications to it.  For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control compilation
+and installation of the library.
+
+  Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it).  Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+  1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+  You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+  2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) The modified work must itself be a software library.
+
+    b) You must cause the files modified to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    c) You must cause the whole of the work to be licensed at no
+    charge to all third parties under the terms of this License.
+
+    d) If a facility in the modified Library refers to a function or a
+    table of data to be supplied by an application program that uses
+    the facility, other than as an argument passed when the facility
+    is invoked, then you must make a good faith effort to ensure that,
+    in the event an application does not supply such function or
+    table, the facility still operates, and performs whatever part of
+    its purpose remains meaningful.
+
+    (For example, a function in a library to compute square roots has
+    a purpose that is entirely well-defined independent of the
+    application.  Therefore, Subsection 2d requires that any
+    application-supplied function or table used by this function must
+    be optional: if the application does not supply it, the square
+    root function must still compute square roots.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Library,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Library, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Library.
+
+In addition, mere aggregation of another work not based on the Library
+with the Library (or with a work based on the Library) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may opt to apply the terms of the ordinary GNU General Public
+License instead of this License to a given copy of the Library.  To do
+this, you must alter all the notices that refer to this License, so
+that they refer to the ordinary GNU General Public License, version 2,
+instead of to this License.  (If a newer version than version 2 of the
+ordinary GNU General Public License has appeared, then you can specify
+that version instead if you wish.)  Do not make any other change in
+these notices.
+
+  Once this change is made in a given copy, it is irreversible for
+that copy, so the ordinary GNU General Public License applies to all
+subsequent copies and derivative works made from that copy.
+
+  This option is useful when you wish to copy part of the code of
+the Library into a program that is not a library.
+
+  4. You may copy and distribute the Library (or a portion or
+derivative of it, under Section 2) in object code or executable form
+under the terms of Sections 1 and 2 above provided that you accompany
+it with the complete corresponding machine-readable source code, which
+must be distributed under the terms of Sections 1 and 2 above on a
+medium customarily used for software interchange.
+
+  If distribution of object code is made by offering access to copy
+from a designated place, then offering equivalent access to copy the
+source code from the same place satisfies the requirement to
+distribute the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  5. A program that contains no derivative of any portion of the
+Library, but is designed to work with the Library by being compiled or
+linked with it, is called a "work that uses the Library".  Such a
+work, in isolation, is not a derivative work of the Library, and
+therefore falls outside the scope of this License.
+
+  However, linking a "work that uses the Library" with the Library
+creates an executable that is a derivative of the Library (because it
+contains portions of the Library), rather than a "work that uses the
+library".  The executable is therefore covered by this License.
+Section 6 states terms for distribution of such executables.
+
+  When a "work that uses the Library" uses material from a header file
+that is part of the Library, the object code for the work may be a
+derivative work of the Library even though the source code is not.
+Whether this is true is especially significant if the work can be
+linked without the Library, or if the work is itself a library.  The
+threshold for this to be true is not precisely defined by law.
+
+  If such an object file uses only numerical parameters, data
+structure layouts and accessors, and small macros and small inline
+functions (ten lines or less in length), then the use of the object
+file is unrestricted, regardless of whether it is legally a derivative
+work.  (Executables containing this object code plus portions of the
+Library will still fall under Section 6.)
+
+  Otherwise, if the work is a derivative of the Library, you may
+distribute the object code for the work under the terms of Section 6.
+Any executables containing that work also fall under Section 6,
+whether or not they are linked directly with the Library itself.
+
+  6. As an exception to the Sections above, you may also combine or
+link a "work that uses the Library" with the Library to produce a
+work containing portions of the Library, and distribute that work
+under terms of your choice, provided that the terms permit
+modification of the work for the customer's own use and reverse
+engineering for debugging such modifications.
+
+  You must give prominent notice with each copy of the work that the
+Library is used in it and that the Library and its use are covered by
+this License.  You must supply a copy of this License.  If the work
+during execution displays copyright notices, you must include the
+copyright notice for the Library among them, as well as a reference
+directing the user to the copy of this License.  Also, you must do one
+of these things:
+
+    a) Accompany the work with the complete corresponding
+    machine-readable source code for the Library including whatever
+    changes were used in the work (which must be distributed under
+    Sections 1 and 2 above); and, if the work is an executable linked
+    with the Library, with the complete machine-readable "work that
+    uses the Library", as object code and/or source code, so that the
+    user can modify the Library and then relink to produce a modified
+    executable containing the modified Library.  (It is understood
+    that the user who changes the contents of definitions files in the
+    Library will not necessarily be able to recompile the application
+    to use the modified definitions.)
+
+    b) Use a suitable shared library mechanism for linking with the
+    Library.  A suitable mechanism is one that (1) uses at run time a
+    copy of the library already present on the user's computer system,
+    rather than copying library functions into the executable, and (2)
+    will operate properly with a modified version of the library, if
+    the user installs one, as long as the modified version is
+    interface-compatible with the version that the work was made with.
+
+    c) Accompany the work with a written offer, valid for at
+    least three years, to give the same user the materials
+    specified in Subsection 6a, above, for a charge no more
+    than the cost of performing this distribution.
+
+    d) If distribution of the work is made by offering access to copy
+    from a designated place, offer equivalent access to copy the above
+    specified materials from the same place.
+
+    e) Verify that the user has already received a copy of these
+    materials or that you have already sent this user a copy.
+
+  For an executable, the required form of the "work that uses the
+Library" must include any data and utility programs needed for
+reproducing the executable from it.  However, as a special exception,
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies
+the executable.
+
+  It may happen that this requirement contradicts the license
+restrictions of other proprietary libraries that do not normally
+accompany the operating system.  Such a contradiction means you cannot
+use both them and the Library together in an executable that you
+distribute.
+
+  7. You may place library facilities that are a work based on the
+Library side-by-side in a single library together with other library
+facilities not covered by this License, and distribute such a combined
+library, provided that the separate distribution of the work based on
+the Library and of the other library facilities is otherwise
+permitted, and provided that you do these two things:
+
+    a) Accompany the combined library with a copy of the same work
+    based on the Library, uncombined with any other library
+    facilities.  This must be distributed under the terms of the
+    Sections above.
+
+    b) Give prominent notice with the combined library of the fact
+    that part of it is a work based on the Library, and explaining
+    where to find the accompanying uncombined form of the same work.
+
+  8. You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License.  Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License.  However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+  9. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Library or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+  10. Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+
+  11. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+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
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under any
+particular circumstance, the balance of the section is intended to apply,
+and the section as a whole is intended to apply in other circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  12. If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License may add
+an explicit geographical distribution limitation excluding those countries,
+so that distribution is permitted only in or among countries not thus
+excluded.  In such case, this License incorporates the limitation as if
+written in the body of this License.
+
+  13. The Free Software Foundation may publish revised and/or new
+versions of the Lesser 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 Library
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation.  If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+
+  14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission.  For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this.  Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+                            NO WARRANTY
+
+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "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
+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY 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
+LIBRARY (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 LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    {description}
+    Copyright (C) {year} {fullname}
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+    USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random
+  Hacker.
+
+  {signature of Ty Coon}, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!

README.md

@@ -0,0 +1,60 @@
+# Item Drop [![](https://github.com/minetest-mods/item_drop/workflows/build/badge.svg)](https://github.com/minetest-mods/item_drop/actions) [![License](https://img.shields.io/badge/license-LGPLv2.1%2B-blue.svg)](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html)
+
+A highly configurable mod providing item magnet and in-world node drops\
+By [PilzAdam](https://github.com/PilzAdam),
+[texmex](https://github.com/tacotexmex/), [hybriddog](https://github.com/hybriddog/).
+
+## Licensing
+LGPLv2.1/CC BY-SA 3.0. Particle code from WCILA mod by Aurailus, originally licensed MIT.
+
+## Notes
+`item_drop` can be played with Minetest 0.4.16 or above. It was originally
+developed by [PilzAdam](https://github.com/PilzAdam/item_drop).
+
+## List of features
+* All settings may be configured from within the game itself.
+  (Settings tab > Advanced settings > Mods > item_drop)
+* Drops nodes as in-world items on dig if `item_drop.enable_item_drop` is
+  `true` (true by default) It does nothing in creative mode.
+* Puts dropped items to the player's inventory if `item_drop.enable_item_pickup`
+  is `true` (true by default)
+  * Multiple items are picked in a quick succession instead of all at once which
+    is indicated by the pickup sound.
+  * It uses a node radius set in `item_drop.pickup_radius` (default 0.75),
+    if items are within this radius around the player's belt, they're picked.
+  * If `item_drop.pickup_age` is something positive, items dropped by players
+    are ignored for this time to avoid instantly picking up when dropping.
+  * If `item_drop.pickup_age` is `-1`, items are only picked when they don't
+    move, it's another fix for instant item picking.
+  * If `item_drop.magnet_radius` is bigger than `item_drop.pickup_radius`,
+    items between these radii are flying to the player for
+    `item_drop.magnet_time` seconds, after this time, they're picked or stop
+    flying.
+  * Enable manual item pickups by mouse only if `item_drop.mouse_pickup` is
+    `true` (true by default)
+* Plays a sound when the items are picked up with the gain level set to
+  `item_drop.pickup_sound_gain` (default 0.2)
+* Requires a key to be pressed in order to pick items if
+  `item_drop.enable_pickup_key` is `true` (true by default)
+  * The keytypes to choose from by setting `item_pickup_keytype` are:
+    * Use key (`Use`)
+    * Sneak key (`Sneak`)
+    * Left and Right keys combined (`LeftAndRight`)
+    * Right mouse button (`RMB`)
+    * Sneak key and right mouse button combined (`SneakAndRMB`)
+  * If `item_drop.pickup_keyinvert` is `true`, items are
+    collected when the key is not pressed instead of when it's pressed.
+* Displays a particle of the picked item above the player if
+  `item_drop.pickup_particle` is `true` (true by default)
+
+
+## Known issues
+
+## Bug reports and suggestions
+You can report bugs or suggest ideas by
+[filing an issue](http://github.com/minetest-mods/item_drop/issues/new).
+
+## Links
+* [Download ZIP](https://github.com/minetest-mods/item_drop/archive/master.zip)
+* [Source](https://github.com/minetest-mods/item_drop/)
+* [Forum thread](https://forum.minetest.net/viewtopic.php?t=16913)

README.txt

@@ -1,42 +0,0 @@
-===ITEM_DROP MOD for MINETEST-C55===
-by PilzAdam
-
-Introduction:
-This mod adds Minecraft like drop/pick up of items to Minetest.
-
-How to install:
-Unzip the archive an place it in minetest-base-directory/mods/minetest/
-if you have a windows client or a linux run-in-place client. If you have
-a linux system-wide instalation place it in ~/.minetest/mods/minetest/.
-If you want to install this mod only in one world create the folder
-worldmods/ in your worlddirectory.
-For further information or help see:
-http://wiki.minetest.com/wiki/Installing_Mods
-
-How to use the mod:
-Just install it an everything works.
-
-For developers:
-You dont have to use get_drops() anymore because of changes in the
-builtin files of minetest.
-
-License:
-Sourcecode: WTFPL (see below)
-Sound: WTFPL (see below)
-
-See also:
-http://minetest.net/
-
-         DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-                    Version 2, December 2004
-
- Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
-
- Everyone is permitted to copy and distribute verbatim or modified
- copies of this license document, and changing it is allowed as long
- as the name is changed.
-
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. You just DO WHAT THE FUCK YOU WANT TO. 

description.txt

@@ -0,0 +1 @@
+A highly configurable mod providing item magnet and in-world node drops

init.lua

@@ -1,116 +1,436 @@
-minetest.register_globalstep(function(dtime)
-	for _,player in ipairs(minetest.get_connected_players()) do
-		if player:get_hp() > 0 or not minetest.setting_getbool("enable_damage") then
-			local pos = player:getpos()
+local load_time_start = minetest.get_us_time()
+
+-- Functions which can be overridden by mods
+item_drop = {
+	-- This function is executed before picking up an item or making it fly to
+	-- the player. If it does not return true, the item is ignored.
+	-- It is also executed before collecting the item after it flew to
+	-- the player and did not reach him/her for magnet_time seconds.
+	can_pickup = function(entity, player)
+		if entity.item_drop_picked then
+			-- Ignore items where picking has already failed
+			return false
+		end
+		return true
+	end,
+
+	-- before_collect and after_collect are executed before and after an item
+	-- is collected by a player
+	before_collect = function(entity, pos, player)
+	end,
+	after_collect = function(entity, pos, player)
+		entity.item_drop_picked = true
+	end,
+}
+
+local function legacy_setting_getbool(name_new, name_old, default)
+	local v = minetest.settings:get_bool(name_new)
+	if v == nil then
+		v = minetest.settings:get_bool(name_new)
+	end
+	if default then
+		return v ~= false
+	end
+	return v
+end
+
+local function legacy_setting_getnumber(name_new, name_old, default)
+	return tonumber(minetest.settings:get(name_new))
+		or tonumber(minetest.settings:get(name_old))
+		or default
+end
+
+if legacy_setting_getbool("item_drop.enable_item_pickup",
+		"enable_item_pickup", true) then
+	local pickup_gain = legacy_setting_getnumber("item_drop.pickup_sound_gain",
+		"item_pickup_gain", 0.2)
+	local pickup_particle =
+		minetest.settings:get_bool("item_drop.pickup_particle", true)
+	local pickup_radius = legacy_setting_getnumber("item_drop.pickup_radius",
+		"item_pickup_radius", 0.75)
+	local magnet_radius = tonumber(
+		minetest.settings:get("item_drop.magnet_radius")) or -1
+	local magnet_time = tonumber(
+		minetest.settings:get("item_drop.magnet_time")) or 5.0
+	local pickup_age = tonumber(
+		minetest.settings:get("item_drop.pickup_age")) or 0.5
+	local key_triggered = legacy_setting_getbool("item_drop.enable_pickup_key",
+		"enable_item_pickup_key", true)
+	local key_invert = minetest.settings:get_bool(
+		"item_drop.pickup_keyinvert") ~= false
+	local keytype
+	if key_triggered then
+		keytype = minetest.settings:get("item_drop.pickup_keytype") or
+		minetest.settings:get("item_pickup_keytype") or "Use"
+		-- disable pickup age if picking is explicitly enabled by the player
+		if not key_invert then
+			pickup_age = math.min(pickup_age, 0)
+		end
+	end
+	local mouse_pickup = minetest.settings:get_bool(
+		"item_drop.mouse_pickup") ~= false
+	if not mouse_pickup then
+		minetest.registered_entities["__builtin:item"].pointable = false
+	end
+
+	local magnet_mode = magnet_radius > pickup_radius
+	local zero_velocity_mode = pickup_age == -1
+	if magnet_mode
+	and zero_velocity_mode then
+		error"zero velocity mode can't be used together with magnet mode"
+	end
+
+	-- tells whether an inventorycube should be shown as pickup_particle or not
+	-- for known drawtypes
+	local inventorycube_drawtypes = {
+		normal = true,
+		allfaces = true,
+		allfaces_optional = true,
+		glasslike = true,
+		glasslike_framed = true,
+		glasslike_framed_optional = true,
+		liquid = true,
+		flowingliquid = true,
+	}
+
+	-- Get an image string from a tile definition
+	local function tile_to_image(tile, fallback_image)
+		if not tile then
+			return fallback_image
+		end
+		local tile_type = type(tile)
+		if tile_type == "string" then
+			return tile
+		end
+		assert(tile_type == "table", "Tile definition is not a string or table")
+		local image = tile.name or tile.image
+		assert(image, "Tile definition has no image file specified")
+		if tile.color then
+			local colorstr = minetest.colorspec_to_colorstring(tile.color)
+			if colorstr then
+				return image .. "^[multiply:" .. colorstr
+			end
+		end
+		return image
+	end
+
+	-- adds the item to the inventory and removes the object
+	local function collect_item(ent, pos, player)
+		item_drop.before_collect(ent, pos, player)
+		minetest.sound_play("item_drop_pickup", {
+			pos = pos,
+			gain = pickup_gain,
+		}, true)
+		if pickup_particle then
+			local item = minetest.registered_nodes[
+				ent.itemstring:gsub("(.*)%s.*$", "%1")]
+			local image
+			if item and item.tiles and item.tiles[1] then
+				if inventorycube_drawtypes[item.drawtype] then
+					local tiles = item.tiles
+					-- color in the tile definition is handled by tile_to_image.
+					-- color in the node definition is not yet supported here.
+					local top = tile_to_image(tiles[1])
+					local left = tile_to_image(tiles[3], top)
+					local right = tile_to_image(tiles[5], left)
+					image = minetest.inventorycube(top, left, right)
+				else
+					image = item.inventory_image or item.tiles[1]
+				end
+				minetest.add_particle({
+					pos = {x = pos.x, y = pos.y + 1.5, z = pos.z},
+					velocity = {x = 0, y = 1, z = 0},
+					acceleration = {x = 0, y = -4, z = 0},
+					expirationtime = 0.2,
+					size = 3,--math.random() + 0.5,
+					vertical = false,
+					texture = image,
+				})
+			end
+		end
+		ent:on_punch(player)
+		item_drop.after_collect(ent, pos, player)
+	end
+
+	-- opt_get_ent gets the object's luaentity if it can be collected
+	local opt_get_ent
+	if zero_velocity_mode then
+		function opt_get_ent(object)
+			if object:is_player()
+			or not vector.equals(object:get_velocity(), {x=0, y=0, z=0}) then
+				return
+			end
+			local ent = object:get_luaentity()
+			if not ent
+			or ent.name ~= "__builtin:item"
+			or ent.itemstring == "" then
+				return
+			end
+			return ent
+		end
+	else
+		function opt_get_ent(object)
+			if object:is_player() then
+				return
+			end
+			local ent = object:get_luaentity()
+			if not ent
+			or ent.name ~= "__builtin:item"
+			or (ent.dropped_by and ent.age < pickup_age)
+			or ent.itemstring == "" then
+				return
+			end
+			return ent
+		end
+	end
+
+	local afterflight
+	if magnet_mode then
+		-- take item or reset velocity after flying a second
+		function afterflight(object, inv, player)
+			-- TODO: test what happens if player left the game
+			local ent = opt_get_ent(object)
+			if not ent then
+				return
+			end
+			local item = ItemStack(ent.itemstring)
+			if inv
+			and inv:room_for_item("main", item)
+			and item_drop.can_pickup(ent, player) then
+				collect_item(ent, object:get_pos(), player)
+			else
+				-- the acceleration will be reset by the object's on_step
+				object:set_velocity({x=0,y=0,z=0})
+				ent.is_magnet_item = false
+			end
+		end
+
+		-- disable velocity and acceleration changes of items flying to players
+		minetest.after(0, function()
+			local ObjectRef
+			local blocked_methods = {"set_acceleration", "set_velocity",
+				"setacceleration", "setvelocity"}
+			local itemdef = minetest.registered_entities["__builtin:item"]
+			local old_on_step = itemdef.on_step
+			local function do_nothing() end
+			function itemdef.on_step(self, ...)
+				if not self.is_magnet_item then
+					return old_on_step(self, ...)
+				end
+				ObjectRef = ObjectRef or getmetatable(self.object)
+				local old_funcs = {}
+				for i = 1, #blocked_methods do
+					local method = blocked_methods[i]
+					old_funcs[method] = ObjectRef[method]
+					ObjectRef[method] = do_nothing
+				end
+				old_on_step(self, ...)
+				for i = 1, #blocked_methods do
+					local method = blocked_methods[i]
+					ObjectRef[method] = old_funcs[method]
+				end
+			end
+		end)
+	end
+
+	-- set keytype to the key name if possible
+	if keytype == "Use" then
+		keytype = "aux1"
+	elseif keytype == "Sneak" then
+		keytype = "sneak"
+	elseif keytype == "LeftAndRight" then -- LeftAndRight combination
+		keytype = 0
+	elseif keytype == "SneakAndRMB" then -- SneakAndRMB combination
+		keytype = 1
+	end
+
+
+	-- tests if the player has the keys pressed to enable item picking
+	local function has_keys_pressed(player)
+		if not key_triggered then
+			return true
+		end
+
+		local control = player:get_player_control()
+		local keys_pressed
+		if keytype == 0 then -- LeftAndRight combination
+			keys_pressed = control.left and control.right
+		elseif keytype == 1 then -- SneakAndRMB combination
+			keys_pressed = control.sneak and control.RMB
+		else
+			keys_pressed = control[keytype]
+		end
+
+		return keys_pressed ~= key_invert
+	end
+
+	local function is_inside_map(pos)
+		local bound = 31000
+		return -bound < pos.x and pos.x < bound
+			and -bound < pos.y and pos.y < bound
+			and -bound < pos.z and pos.z < bound
+	end
+
+	-- called for each player to possibly collect an item, returns true if so
+	local function pickupfunc(player)
+		if not has_keys_pressed(player)
+		or not minetest.get_player_privs(player:get_player_name()).interact
+		or player:get_hp() <= 0 then
+			return
+		end
+
+		local pos = player:get_pos()
+		if not is_inside_map(pos) then
+			-- get_objects_inside_radius crashes for too far positions
+			return
+		end
 		pos.y = pos.y+0.5
 		local inv = player:get_inventory()
 
-			for _,object in ipairs(minetest.env:get_objects_inside_radius(pos, 1)) do
-				if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" then
-					if inv and inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
-						inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
-						if object:get_luaentity().itemstring ~= "" then
-							minetest.sound_play("item_drop_pickup", {
-								to_player = player:get_player_name(),
-								gain = 0.4,
-							})
+		local objectlist = minetest.get_objects_inside_radius(pos,
+			magnet_mode and magnet_radius or pickup_radius)
+		for i = 1,#objectlist do
+			local object = objectlist[i]
+			local ent = opt_get_ent(object)
+			if ent
+			and item_drop.can_pickup(ent, player) then
+				local item = ItemStack(ent.itemstring)
+				if inv:room_for_item("main", item) then
+					local flying_item
+					local pos2
+					if magnet_mode then
+						pos2 = object:get_pos()
+						flying_item = vector.distance(pos, pos2) > pickup_radius
+					end
+					if not flying_item then
+						-- The item is near enough to pick it
+						collect_item(ent, pos, player)
+						-- Collect one item at a time to avoid the loud pop
+						return true
+					end
+					-- The item is not too far a way but near enough to be
+					-- magnetised, make it fly to the player
+					local vel = vector.multiply(vector.subtract(pos, pos2), 3)
+					vel.y = vel.y + 0.6
+					object:set_velocity(vel)
+					if not ent.is_magnet_item then
+						ent.object:set_acceleration({x=0, y=0, z=0})
+						ent.is_magnet_item = true
+
+						minetest.after(magnet_time, afterflight,
+							object, inv, player)
+					end
 				end
-						object:get_luaentity().itemstring = ""
-						object:remove()
 			end
 		end
 	end
 
-			for _,object in ipairs(minetest.env:get_objects_inside_radius(pos, 2)) do
-				if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" then
-					if object:get_luaentity().collect then
-						if inv and inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
-							local pos1 = pos
-							pos1.y = pos1.y+0.2
-							local pos2 = object:getpos()
-							local vec = {x=pos1.x-pos2.x, y=pos1.y-pos2.y, z=pos1.z-pos2.z}
-							vec.x = vec.x*3
-							vec.y = vec.y*3
-							vec.z = vec.z*3
-							object:setvelocity(vec)
-							object:get_luaentity().physical_state = false
-							object:get_luaentity().object:set_properties({
-								physical = false
-							})
-							
-							minetest.after(1, function(args)
-								local lua = object:get_luaentity()
-								if object == nil or lua == nil or lua.itemstring == nil then
-									return
+	local function pickup_step()
+		local got_item
+		local players = minetest.get_connected_players()
+		for i = 1,#players do
+			got_item = got_item or pickupfunc(players[i])
 		end
-								if inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
-									inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
-									if object:get_luaentity().itemstring ~= "" then
-										minetest.sound_play("item_drop_pickup", {
-											to_player = player:get_player_name(),
-											gain = 0.4,
-										})
-									end
-									object:get_luaentity().itemstring = ""
-									object:remove()
+		-- lower step if takeable item(s) were found
+		local time
+		if got_item then
+			time = 0.02
 		else
-									object:setvelocity({x=0,y=0,z=0})
-									object:get_luaentity().physical_state = true
-									object:get_luaentity().object:set_properties({
-										physical = true
-									})
+			time = 0.2
 		end
-							end, {player, object})
+		minetest.after(time, pickup_step)
+	end
+	minetest.after(3.0, pickup_step)
+end
 
+if legacy_setting_getbool("item_drop.enable_item_drop", "enable_item_drop", true)
+and not minetest.settings:get_bool("creative_mode") then
+	-- Workaround to test if an item metadata (ItemStackMetaRef) is empty
+	local function itemmeta_is_empty(meta)
+		local t = meta:to_table()
+		for k, v in pairs(t) do
+			if k ~= "fields" then
+				return false
+			end
+			assert(type(v) == "table")
+			if next(v) ~= nil then
+				return false
 			end
 		end
+		return true
 	end
-			end
-		end
-	end
-end)
 
-function minetest.handle_node_drops(pos, drops, digger)
-	local inv
-	if minetest.setting_getbool("creative_mode") and digger and digger:is_player() then
-		inv = digger:get_inventory()
+	-- Tests if the item has special information such as metadata
+	local function can_split_item(item)
+		return item:get_wear() == 0 and itemmeta_is_empty(item:get_meta())
 	end
-	for _,item in ipairs(drops) do
-		local count, name
+
+	local function spawn_items(pos, items_to_spawn)
+		for i = 1,#items_to_spawn do
+			local obj = minetest.add_item(pos, items_to_spawn[i])
+			if not obj then
+				error("Couldn't spawn item " .. name .. ", drops: "
+					.. dump(drops))
+			end
+
+			local vel = obj:get_velocity()
+			local x = math.random(-5, 4)
+			if x >= 0 then
+				x = x+1
+			end
+			vel.x = 1 / x
+			local z = math.random(-5, 4)
+			if z >= 0 then
+				z = z+1
+			end
+			vel.z = 1 / z
+			obj:set_velocity(vel)
+		end
+	end
+
+	local old_handle_node_drops = minetest.handle_node_drops
+	function minetest.handle_node_drops(pos, drops, player)
+		if not player or player.is_fake_player then
+			-- Node Breaker or similar machines should receive items in the
+			-- inventory
+			return old_handle_node_drops(pos, drops, player)
+		end
+		for i = 1,#drops do
+			local item = drops[i]
 			if type(item) == "string" then
-			count = 1
-			name = item
-		else
-			count = item:get_count()
-			name = item:get_name()
+				-- The string is not necessarily only the item name,
+				-- so always convert it to ItemStack
+				item = ItemStack(item)
 			end
-		if not inv or not inv:contains_item("main", ItemStack(name)) then
-			for i=1,count do
-				local obj = minetest.env:add_item(pos, name)
-				if obj ~= nil then
-					obj:get_luaentity().collect = true
-					local x = math.random(1, 5)
-					if math.random(1,2) == 1 then
-						x = -x
-					end
-					local z = math.random(1, 5)
-					if math.random(1,2) == 1 then
-						z = -z
-					end
-					obj:setvelocity({x=1/x, y=obj:getvelocity().y, z=1/z})
+			local count = item:get_count()
+			local name = item:get_name()
 
-					-- FIXME this doesnt work for deactiveted objects
-					if minetest.setting_get("remove_items") and tonumber(minetest.setting_get("remove_items")) then
-						minetest.after(tonumber(minetest.setting_get("remove_items")), function(obj)
-							obj:remove()
-						end, obj)
+			-- Sometimes nothing should be dropped
+			if name == ""
+			or not minetest.registered_items[name] then
+				count = 0
+			end
+
+			if count > 0 then
+				-- Split items if possible
+				local items_to_spawn = {item}
+				if can_split_item(item) then
+					for i = 1,count do
+						items_to_spawn[i] = name
 					end
 				end
+
+				spawn_items(pos, items_to_spawn)
 			end
 		end
 	end
 end
 
-if minetest.setting_get("log_mods") then
-	minetest.log("action", "item_drop loaded")
+
+local time = (minetest.get_us_time() - load_time_start) / 1000000
+local msg = "[item_drop] loaded after ca. " .. time .. " seconds."
+if time > 0.01 then
+	print(msg)
+else
+	minetest.log("info", msg)
 end

mod.conf

@@ -0,0 +1,2 @@
+name = item_drop
+description = A highly configurable mod providing item magnet and in-world node drops

settingtypes.txt

@@ -0,0 +1,38 @@
+#Pick up items automatically
+item_drop.enable_item_pickup (Enable item pickups) bool true
+
+#Drop items in-world on dig, does nothing in creative mode
+item_drop.enable_item_drop (Enable item drops) bool true
+
+#Use a key to pick up items
+item_drop.enable_pickup_key (Use pickup key) bool true
+
+#Collect items when the key is not pressed instead of when it is pressed
+item_drop.pickup_keyinvert (Invert pickup key) bool true
+
+#What keytype to use as pickup key
+item_drop.pickup_keytype (Pickup keytype) enum Use Use,Sneak,LeftAndRight,RMB,SneakAndRMB
+
+#The volume of the pickup sound
+item_drop.pickup_sound_gain (Pickup sound gain) float 0.4
+
+#Display a particle of the item picked up above the player
+item_drop.pickup_particle (Pickup particle) bool true
+
+#Player pickup radius, the maximum distance from which items can be collected
+item_drop.pickup_radius (Pickup radius) float 0.75
+
+#Magnet radius, items between pickup_radius and this begin flying to the player
+#Set it to -1 (or something else smaller than pickup_radius) to disable item
+#flying
+item_drop.magnet_radius (Magnet radius) float -1
+
+#Item flight duration, items flying for more than this time are added to the
+#player's inventory
+item_drop.magnet_time (Magnet time) float 5.0
+
+#Time delay in seconds after autopicking an item if it's dropped by a player
+item_drop.pickup_age (Pickup age) float 0.5
+
+#Enable manual item pickups by mouse
+item_drop.mouse_pickup (Mouse pickup) bool true