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5485 Commits

Author SHA1 Message Date
MysticTempest 7f5ba9e8c7 Implement slimeblock piston launchers: 
Adds the mechanic of launching entities standing on, or in
front of slimeblocks; which are attached to, and pushed by pistons.

I've also updated the rules regarding pushing, and pulling
of nodes & objects. So, that more complex circuits can be built.

This enables the feature of some nodes being unpullable, but
otherwise pushable or diggable.
A certain selection of nodes that can never be moved.
And, stops certain entities from being pushed if they shouldn't move.
 2022-02-23 17:36:55 -06:00
Nils Dagsson Moskopp be915478af
Fix redstone comparator flooding crash 
Redstone comparators have two modes, comparison mode & subtraction mode.
Before this patch, the functions to turn comparators on or off attempted
to swap nodes with comparators in the same mode, but failed to determine
the correct replacement node, if the existing node was not a comparator.

When a comparator in an on state (e.g. powered by a filled cauldron) was
flooded, the flooding dropped the comparator and replaced the comparator
node that was to be swapped out with air, which lead to a server crash.

This patch changes the functions that turn comparators on or off so they
only swap existing nodes with comparators in the same mode if the name
of the replacement node can be determined – i.e. if it is not nil.
 2022-02-23 00:27:56 +01:00
Nils Dagsson Moskopp d9764fdac6
Add comparator test structure 
This patch adds a new test structure to the “/spawnstruct” command which
can be spawned with this command: /spawnstruct test_structure_comparator

The structure was added to reduce manual work when examining or
verifying comparator behaviour after changes to comparator code.
 2022-02-22 23:48:10 +01:00
Nils Dagsson Moskopp c128d43321
Increase temporary message display duration to 10s 2022-02-12 17:25:09 +01:00
Nils Dagsson Moskopp e7070c034c
Add setting for temporary message display duration 2022-02-12 17:25:03 +01:00
cora f5ba6f5649
Fix memory leak & C stack overflow 
Before this patch, when placing a fire above a node that would turn it
into eternal fire (e.g. Netherrack or Magma) the spawn_fire() function
would call itself infinitely via the on_construct() handler of eternal
fire – because the latter called spawn_fire() itself.

On an x86 machine, this caused a memory leak, hanging Minetest. On an
x86_64 machine though, Minetest crashed immediately, showing an error
message about a stack overflow.
 2022-02-11 17:44:11 +01:00
cora 4647710945
Extinguish fire without nearby “fuel” faster 
This patch adjusts how often the ABM runs that removes fire nodes with
no adjacent nodes that can burn up. This makes fire linger less in air.
 2022-02-11 17:44:10 +01:00
cora 5d09ec311c
Extinguish fire using an ABM instead of timers 
Even the mitigated timers seem to have lead to slow
memory leaks. Once Minetest has used up all the RAM,
it will free some, then quickly use memory up again,
then repeat it ad nauseum, requiring 100% CPU. On a
PC with 2GB of RAM this could be reliably triggered
by having a fire burn a forest for 20 to 30 minutes.

This patch removes fire node timers completely and
instead extinguishes fire using an ABM.
 2022-02-11 17:44:09 +01:00
cora ef7370550f
Make fire spread direction truly random 
This patch initializes the random number generator used in mcl_fire with
the current Unix timestamp. It also corrects two biases in fire spread
that were caused by nodes being iterated over in a predictable way.
 2022-02-11 17:41:42 +01:00
cora 6c2fb98160
Fix nodes with “flammable = -1” not catching fire 2022-02-07 04:51:27 +01:00
cora 052c9fcbcf
Fix diagonal fire-spread 
In Minecraft fire spread logic, “adjacent” does not mean “diagonal”.
 2022-02-07 04:51:06 +01:00
cora db8fbdc5dd
Fix beds burning away and dropping 2022-02-07 03:39:52 +01:00
cora 1b89c15193
Fix double nodes not being properly removed 2022-02-07 03:39:51 +01:00
cora 02fa2c9e07
Fix nodes that should not burn up burning up 
Nodes with the group “flammable = -1” (e.g. crafting tables) must be
able to catch fire, but must not burn up. This patch adds checks for
this group.
 2022-02-07 03:39:51 +01:00
cora c12076e74d
Reimplement basic Minecraft-like fire spread 2022-02-07 03:39:45 +01:00
cora 4deca628dc
Make fire actually remove nodes 2022-02-07 03:22:15 +01:00
cora df4ea94dbc
Add node timer back in so fires burn out 2022-02-07 03:22:02 +01:00
cora 8e8ccddb68
Replace MineClone2 fire with Minetest Game ABMs 
ABMs have better performance than the laggy timer-based implementation.
 2022-02-07 03:18:54 +01:00
Nils Dagsson Moskopp 96822be63d
Add (theoretically) fireproof test structure 
This patch adds a new test structure to the “/spawnstruct” command which
can be spawned with this command: /spawnstruct test_structure_fireproof

The structure can be used to verify that eternal fire can be spawned by
the structure placement code. It can also be used to debug fire spread,
as according to Minecraft fire spread rules, it should be fireproof.

See <https://minecraft.fandom.com/wiki/Fire#Spread> for those rules.
 2022-02-06 01:19:23 +01:00
Nils Dagsson Moskopp f89c52dff6
Fix mob-in-boat crash in Minetest 5.5-dev 
In Minetest 5.4.1, calling get_player_control() on a mob returned the
empty string. Minetest commit 5eb45e1ea03c6104f007efec6dd9c351f310193d
changed this, so now calling get_player_control() on a mob returns nil.

As mcl_boats defines boats that can have a player or a mob as a driver,
code like the following crashes with a changed get_player_control() API:

local ctrl = driver:get_player_control()
if ctrl.sneak then
    detach_object(driver, true)
end

Furthermore, once a world has crashed, joining it near a mob that is the
driver of a boat with such control code immediately crashes again.

When I reported this bug to Minetest, several Minetest core developers
stated that they disliked the old API and proposed other return values
for calling a mob's get_player_control() function – all different from
the empty string. Since I have some doubts that this bug will be fixed
in Minetest 5.5.0, boat code must take into account a nil return value.

Minetest issue: https://github.com/minetest/minetest/issues/11989
 2022-01-26 18:25:08 +01:00
epCode 6bfb97842f
Fix armor rendering when wearing pumpkin 
Before this patch, wearing a pumpkin would make body armor render as a
corrupted item held in the player's left hand instead of on their body.
Some parts of their armor would also get rendered on the player's feet.

(cherry picked from commit 12192d1a8ddffdae1ec13ea8f6efc6fe2465c2b8)
 2022-01-23 20:11:55 +01:00
Nils Dagsson Moskopp f975055464
Fix creative mode inventory search crash 
Before this patch it was possible for any user to to crash Minetest in
creative mode. This was possible because queries in the search field
were interpreted as search patterns for string.find().

A search for a single square bracket would reliably crash the server.
Also, a search for 6000 times the string “a?” would hang the server.

The solution to both bugs is to not interpret the query as a pattern.
 2022-01-21 23:31:25 +01:00
Nils Dagsson Moskopp 4d02af8c94
Convert correct floor node to dirt as gourd grows 
Before this patch, growing a gourd (e.g. melon, pumpkin) would always
convert a node west of the node below the stem to dirt if belonged to
the group “dirtifies_below_solid”. This happened because of a loop in
which the variables floorpos and floor were re-used without setting a
new value … therefore, both floorpos and floor were always containing
the last values set in a previous loop instead of the correct values.

This patch fixes the problem by setting both variables in both loops.
 2022-01-13 07:29:57 +01:00
Nils Dagsson Moskopp 0b5fa14041 Do not crash if minetest.find_nodes_in_area() lies 2021-12-20 21:38:24 +01:00
Nils Dagsson Moskopp df7bd78af5
Add noise to christmas chest textures 2021-12-12 15:40:29 +01:00
Nils Dagsson Moskopp fe3e837e1b
Reskin chests as presents on December 24th to 26th 2021-12-11 18:17:53 +01:00
Lizzy Fleckenstein dfa56f229f
Spawn small chest entities only if animated chests are enabled 2021-12-10 22:15:53 +01:00
cora 5deaabdb47
Fix player bone positions and properties setting 
The comparison and setting logic in the previous patch that set player
bone positions and properties conditionally incorrectly did not update
some values (like player eye level position) when they changed. This
patch fixes it and adds asserts to ensure the code works as intended.
 2021-12-09 04:53:45 +01:00
cora d77f31eab8
Only set/send player properties if necessary 
Before this patch, Mineclonia set (and therefore sent) player bone
positions and player properties in every globalstep. This results in
about 30 TOCLIENT_ACTIVE_OBJECT_MESSAGE per second per player. This
patch adds conditional functions to set bone positions and properties.
The functions set values only when they have changed, reducing traffic.
 2021-12-09 04:26:22 +01:00
Nils Dagsson Moskopp 609105e091
Add test cases for get_tool_name() 2021-12-06 04:11:55 +01:00
cora f9e3c4fd6d
Fix crash when skeleton kills player using bow 
Commit 5252952555 used string.gsub() to
strip newlines from tools in death messages. The second return value of
string.gsub() (the number of substitutions) was erroneously returned too
by get_tool_name(). This bug caused a crash whenever a skeleton killed a
player using its bow.
 2021-12-06 03:48:39 +01:00
Lizzy Fleckenstein cacddd3fb4
Fix access to ender inventory without an ender chest 2021-12-03 21:23:10 +01:00
Nils Dagsson Moskopp 54b36c42a9
Add debug command to show ender chest inventory formspec. 2021-12-02 19:44:22 +01:00
cora 5252952555 strip newlines from tools in death messages 
Players naming their tools with newlines can mess up chat with death
messages. This commit strips out newlines (\r and \n ) in the tool
name for death messages.
 2021-12-01 13:25:57 +00:00
Nils Dagsson Moskopp f8b5066c61
Add packed ice crafting recipe 2021-11-24 06:06:26 +01:00
cora 5087e8194a remove swiftness from egapps 
The minetest world is already so small that you can reach world
border from spawn in about 2 hours. I think the regen and fire
resistance are  good enough to make them special.
 2021-11-20 02:14:16 +01:00
Nils Dagsson Moskopp 66dd87af25
Give mobs sunburn at correct light level 
Before this patch, the light level that makes mobs that burn in sunlight
catch fire had been mistakenly specified as minetest.LIGHT_MAX or more.

The correct light level for sunlight is LIGHT_SUN, which is one higher
than minetest.LIGHT_MAX. Since minetest.LIGHT_MAX is the maximum light
value that a node can have and torches emit light at that light level,
mobs that burn in sunlight caught fire inside torch nodes.
 2021-11-19 03:14:36 +01:00
Nils Dagsson Moskopp 6bd4b0e62c
Fix typo in mcl_colors API documentation 2021-11-18 19:23:57 +01:00
AFCMS 3473f55136
Add API documentation to mcl_colors 2021-11-18 19:14:21 +01:00
Lizzy Fleckenstein af7f7c3574
Add mcl_colors 2021-11-18 19:13:08 +01:00
Nils Dagsson Moskopp 76d2846c59
Improve test for minetest.find_nodes_in_area() 
• By emerging test areas, the test gets real map data and does not block.
• The test now also ensures that any return values are compared exactly.
• minetest.find_nodes_in_area() is tested with the “grouped” parameter.
 2021-11-18 04:47:03 +01:00
Nils Dagsson Moskopp 526c25aa57
Add crash fix and tests for minetest.find_nodes_in_area() 
For some specific out of bounds values, the volume calculation in
minetest.find_nodes_in_area() is off by about four million nodes.
Unfortunately that behaviour made it trivial to crash Mineclonia,
as Minetest immediately crashes upon encountering large numbers.

This commit introduces a wrapper around minetest.find_nodes_in_area()
which should avoid a crash. Additionally, three self tests are executed
when a server starts; they crash Mineclonia in case the workaround fails.
 2021-11-18 00:55:59 +01:00
cora 84194b71e6 burning: prevent adding multiple entities+huds 2021-11-12 01:16:16 +01:00
cora 0b7097cb28 add a burning animation fps setting 2021-11-12 01:16:16 +01:00
Nils Dagsson Moskopp 253100380c
Add debug command to burn a player 2021-11-11 21:37:26 +01:00
cora df98db1d8c Merge pull request 'ITEMS/mcl_banners: Render preview banners with transparent patterns correctly' (#158) from banner-mask-fix-4 into master 
Reviewed-on: Mineclonia/Mineclonia#158
Reviewed-by: cora <cora@noreply.git.minetest.land>
 2021-11-08 12:21:50 +00:00
Nils Dagsson Moskopp f410de485a
Render preview banners with transparent patterns correctly 
Without this fix, the banner pattern preview generation does not mask
the banner pattern, so the alpha channel of the banner pattern is not
taken into account. This lead to preview banners with color gradients
showing up as a solid color banner and opaque pixel artifacts for the
bottom triangle pattern.
 2021-10-31 20:53:18 +01:00
cora eee94658e7 mcl_maps: send hud_flags only if actually changed 2021-09-13 14:15:32 +02:00
NO11 3759d50344
Add german translation for stripped wood 2021-09-07 00:48:40 +02:00
NO11 50e913b370
Add template for stripped wood translation 2021-09-07 00:48:39 +02:00