Unified flags handling in C++ and Lua Settings API
-> Reading only, for now. Writing can be implemented later, if needed.
API function to read the currently active flags
-> was impossible from Lua
Co-authored-by: Wuzzy <wuzzy2@mail.ru>
- Add style properties for overriding the the hovered/pressed state
- By default, hovered buttons are a lighter version of the base color
- By default, pressed buttons are a darker version of the base color
- Add hovered bg image support for image buttons (style property)
This reverts commit 1db3d252cff9e8d61fecf1052d7497813851da51.
Temporary solution until a compatible solution is found to define both - formspec and fullscreen backgrounds.
Remove unusable 'minetest.setting_*' from client_lua_api.txt
lua_api.txt:
- Define the 'mod.conf' format
- More precise 'settingtypes.txt' format reference
- Document special sound files 'player_*damage'
- Group, sort and add 'not_in_creative_inventory' special group
- Define the 'Settings' format
- Warning about incorrect byte saving in 'StorageRef'
- Note about non-persistent player definitions fields
- Better 'leveldiff' and 'level' group description
Document new meaning of immortal=1 for players
Disable breathing if player is immortal
Hide builtin statbars if player immortal (delayed)
Co-authored-by: ClobberXD <ClobberXD@gmail.com>
This was previously documented under the general ObjectRef section with a note that this won't work on players. So I think this would fit better with Lua entity-only methods.
This PR also changes the title of the Lua entity-only section from `LuaEntitySAO-only` to `Lua entity only`.
Biome-defined dungeon nodes was added as a feature to MT 5.0.0.
So now remove most of the hardcoded dungeon node code that assumes a
game has stone, sandstone, desert stone, and no other stone types.
If biome-defined dungeon nodes are not found, dungeon nodes fall back
to the 'cobble' mapgen alias if present, if not present they fall back
to biome-defined 'stone'.
Remove now-unnecessary mapgen aliases from MapgenBasic. Non-mgv6 games
now only need to define 3 to 5 mapgen aliases.
Document dungeon parameters.
Make c_lava_source fallback to c_water_source as both are used as cave
liquids.
This allows games to specify biome cave liquids and avoid the old
hardcoded behaviour, but preserves the ability to have multiple
cave liquids in one biome, such as lava and water.
When multiple cave liquids are defined by the biome definition,
make each entire cave use a randomly chosen liquid, instead of
every small cave segment using a randomly chosen liquid.
Plus an optimisation:
Don't place nodes if cave liquid is defined as 'air'
* Force send a mapblock to a player.
Send a single mapblock to a specific remote player.
This is badly needed for mods and games where players are teleported
into terrain which may be not generated, loaded, or modified
significantly since the last player visit.
In all these cases, the player currently ends up in void, air, or
inside blocks which not only looks bad, but has the effect that the
player might end up falling and then the server needs to correct for
the player position again later, which is a hack.
The best solution is to send at least the single mapblock that the
player will be teleported to. I've tested this with ITB which does this
all the time, and I can see it functioning as expected (it even shows
a half loaded entry hallway, as the further blocks aren't loaded yet).
The parameter is a blockpos (table of x, y, z), not a regular pos.
The function may return false if the call failed. This is most likely
due to the target position not being generated or emerged yet, or
another internal failure, such as the player not being initialized.
* Always send mapblock on teleport or respawn.
This avoids the need for mods to send a mapblock on teleport or
respawn, since any call to `player:set_pos()` will pass this code.
Makes the liquid waving shader per-nodedef like waving leaves/plants,
instead of being applied to all liquids.
Like the waving leaves/plants shaders, the liquid waving shader can
also be applied to meshes and nodeboxes.
Derived from a PR by t0ny2.
Like randomwalk caves, preserve nodes that have 'is_ground_content = false',
to avoid dungeons that generate out beyond the edge of a mapchunk destroying
nodes added by mods in 'register_on_generated()'.
Issue discovered by, and original PR by, argyle77.
* Add sounds for falling and attached nodes
The sound specified in `node_definition.sounds.fall` is used.
When a falling node is spawned at a position or an attached node drops, the sound is played at this position.
* allow all sorts of soundspecs
- minetest.get_hit_params
- minetest.get_dig_params
- table.indexof
- Scope of minetest.register_alias
- Vector function parameters
- More explanation of when `minetest.on_player_receive_fields` is called
- Syntax/semantics of the fields in `minetest.on_player_receive_fields`
Store the rotation in the node as a 4x4 transformation matrix internally (through IDummyTransformationSceneNode), which allows more manipulations without losing precision or having gimbal lock issues.
Network rotation is still transmitted as Eulers, though, not as matrix. But it will stay this way in 5.0.
* Add missing tables of registered things
* Eliminate some duplication
Registration functions in 'Registered definitions' section merged into
'Registration functions' section.
* Misc. fixes
* Add privilege definition table
* Remove not-special soil group from special groups
* Merge two registration functions sections
* Move 'added to' information to tables section
Also fix some capitalization and missing periods
* Minor fixes
* Split Registration functions into two subsections
And update Registered definition tables to match order
* Fixes
* Adds Lua methods 'set_rotation()' and 'get_rotation'. Also changed some method names to be more clear. Instead of an f32 being sent over network for yaw, now a v3f is sent for rotation on xyz axes. Perserved Lua method set_yaw/setyaw so that old mods still work, other wise to set yaw they would need to switch to set_rotation(0, yaw, 0).
Mods will now have to initialize the list/slot in order to define the default player hand.
They may use the inventory callbacks to prevent abuse of this list.
Improve item types descriptions.
Add replacements field to fuel definition.
Shorten two headers.
Markdown fixes.
Remove extra example.
Add blank lines after headings.
Linkify section references.
Bracketed section names can be linked when compiled to HTML.
Remove ^ and --[[ ]] symbols.
Fix comment indentation level.
Separate fields with blank lines.
Remove period from single-sentence descriptions, add periods to
multi-sentence descriptions.
Separate inline comments from the code with two spaces.
* Fix textarea formspec documentation
The label is shown and the background isn't
* Document the missing gamma correction when generating mip maps
* Remove duplicate text (such as size parameter descriptions)
Add missing section title for 'Node paramtypes'.
Clarify documentation for schematic Y-slice table.
Document that schematic Y-slice behaviour does not invert for ceiling
schematic decorations.
When the noise value or fill_ratio >= 10.0 complete coverage is enabled.
This disables random placement to avoid redundant multiple placements
at one position. Instead, 1 decoration per surface node is placed by
looping across each division.
'10' was chosen as this is the fill_ratio that previously created
very near complete coverage. The complete coverage feature therefore
integrates smoothly when noise is used for variable decoration density.
'fill_ratio = 10' should be used by modders who want a decoration
placed on every surface node. Compared to before such a decoration
placement will be 10 times faster.
Add new biome fields 'node_dungeon', 'node_dungeon_alt', 'node_dungeon_stair'.
If 'node_dungeon' is not defined dungeons fall back to classic behaviour.
Remove messy and imprecise dungeon material code from 'generateBiomes()'.
Code deciding dungeon materials is now in 'generateDungeons()' and uses the
biome at mapchunk centre for more precision.
Remove hardcoded 'MG_STONE' types as long intended.
Returns the decoration ID for the provided decoration name string.
For use with gennotify, to know the decoration IDs for use in
'minetest.set_gen_notify'.
* Add minetest.bulk_set_node call + experimental mod unittest
* Optimize set_node function to prevent triple lookup on contentfeatures
Do only one lookup for old, and try to merge old and new lookup if node is same than previous node
* Add benchmark function + optimize vector population to have real results
A useful function that applies 'core.is_protected()' to a 3D lattice of
points evenly spaced throughout a defined volume, with a parameter for
the maximum spacing of points.
The `disconnected_*` boxes are the opposites of the `connect_*` ones,
i.e. when a node has no suitable neighbours on the respective side, the
according disconnected box is drawn.
* disconnected_top
* disconnected_bottom
* disconnected_front
* disconnected_left
* disconnected_back
* disconnected_right
* disconnected (when there is *no* neighbour)
* disconnected_sides (when there are *no* neighbours to the sides)
* Add player deletion method to auth handler (fixes#6653)
* Support iterating over the auth database
There was no way to do this previously and a recent commit
broke doing this the "hacky" way by accessing `core.auth_table`.
Remove player object property 'can zoom'.
Add player object property 'zoom fov'.
Remove clientside setting for 'zoom fov'.
Object property default is 15 degrees in creative mode, zoom disabled
in survival mode.
Needed due to zoom now loading and/or generating distant world
according to zoom FOV.
Update object properties serialisation version to 3.
Properly document it instead of referencing the builtin handler as
authoritative "example" code.
Also adds definition of get_auth_handler() which was missing previously.
For consistency, and for much improved access on Github.
On Github:
.md disables being able to link to a line, needed daily when
quickly referring people to particular lines.
Search returns results in .md files, but you cannot then click
the line number to go to that line in the document, making searching
difficult.
Line numbers are not displayed for .md documents.
"diffferent" to "different"
"occuring" to "occurring"
"determin" to "determine"
"ommited" to "omitted"
"authetification" to "authentication"
"conponent" to "component"
"ommitted" to "omitted"
"celcius" to "Celsius"
"succesful" to "successful"
Misspellings found using GNU Spell version 1.0
Add "all_floors" and "all_ceilings" flags for simple and schematic
decorations. Decorations are placed on all floor and/or ceiling surfaces.
Decorations are placed before dungeon generation so placement in dungeons
is not possible.
Add 'getSurfaces()' function to mapgen.cpp that returns 2 arrays of y
coordinates for all floor and ceiling surfaces in a specified node column.
Move 'getHeight()' checks into DecoSimple and DecoSchematic. Delete
'getHeight()' functions.
* Fix default item callbacks to work with nil users
* item.lua: Handle node drops for invalid players
The if-condition for the dropping loop is the same as `inv`, which means that the 2nd possible definition of `give_item` is never used.
Remove redundant `local _, dropped_item`
Formspec input for each individual noise parameter and flag.
Allow noise flags to be set in advanced settings, previously only settable
in minetest.conf.
Standardise 'group format' for noise parameters set in minetest.conf, as
only these support noise flags. However the older 'single line' format is
still accepted to support existing minetest.conf files.
Therefore auto-generate minetest.conf.example with noise parameters in
'group format'.
Setting 'type' in settingtypes.txt is now either 'noise_params_2D' or
'noise_params_3D', the dimension number is displayed in the advanced
settings edit page.
Necessary for placing the base cube of 'plantlike_rooted' drawtype in the
seabed instead of on it.
Useful for placing decorations sunk into, or buried in, the ground.
If 'param2_max' is not used, parameter 'param2' works as before for
compatibility.
If 'param2_max' is used, 'param2' and 'param2_max' become the lower
and upper bounds of a per-decoration random param2.
Increase scrollrate depending on fontsize
Scroll on mousewheel
Allow scrolling and marking text on non writable textareas
Update lua api about readonly mode
Show scrollbar if text overflows
If either of the 2 noise parameters are omitted the ore will occur from y_min
to y_max in a simple horizontal stratum. As this does not compute noise
performance improves, and is ideal for placing many layers.
Clean up some nearby ore documentation.
* Add no_static_save property to luaentites to not save them statically.
This allows for temporary objects that would get deleted anyway as soon as they are loaded again without the static saving overhead.
* Use positive meaning for static_save object property
* Invert meaning also for the LUA parameter
Note: getboolfield() does not change &result when field does not exist, so it defaults to the default value in the header file, which is 'true'.
* Extend push_object_properties()
Implement network communication for channels
* Implement ModChannel manager server side to route incoming messages from clients to other clients
* Add signal handler switch on client & ModChannelMgr on client to handle channels
* Add Lua API bindings + client packet sending + unittests
* Implement server message sending
* Add callback from received message handler to Lua API using registration method
Feature is unnecessary and would greatly complicate future development,
it would also make 'get biome at pos' extremely complex.
Mgv7: Revert option to repeat surface biomes in floatlands, which
depended on the above.
The 'glow' value is added to the ambient light value.
Negative 'glow' disables light's effect on object colour, for faking
self-lighting, UI-style entities, or programmatic colouring in mods.
Dig prediction allows clients to remove dug nodes without
waiting for server acknowledgement.
This patch allows mods to override dig prediction,
it can either be turned off or a different "prediction node"
can be selected.
For precise control of schematic vertical position relative to the
'place_on' node.
Avoids workarounds that add empty nodes to a schematic and therefore
reduce performance.
Also remove long-unused decoration cutoff code.
* Implement minetest.register_on_userlimit_check
This new callback permits to bypass the max_users parameter with new mods condition, based on player name or IP
Only one mod needs to permit it.
Move core part for builtin privileges checks to builtin
Creates a single undulating ore stratum that is continuous across mapchunk
borders and horizontally spans the world.
Due to being continuous is ideal for creating bands of alternative stone
type running through cliffs and mountains, or underground layers.
Add missing documentation of 'ore_param2' parameter.
* Fix animation frame_speed and blend loosing precision due to incorrect data type
Add lua function set_animation_frame_speed to update the frame speed without resetting the animation to start
* Respect object property hp_max field for players
This allows modders to configure the maximal HP per player
* Statbars: Downscale bar to full 20 HP when exceeding this value
Add default max HP for players and breath constants to builtin
Document the constants
* Rename PLAYER_MAX_HP -> PLAYER_MAX_HP_DEFAULT
* Version changes: current dev version is now 0.5.0
* This change permit to have multi branches with various versions
* Dev version is 0.5.0-dev and next release will be 0.5.0
* [CSM] Add flavour limits controlled by server
Server send flavour limits to client permitting to disable or limit some Lua calls
* Add limits for reading nodedefs and itemdefs
* flavour: Add lookup node limits
* Merge get_node_or_nil into get_node.
Sending fake node doesn't make sense in CSM, just return nil if node is not available for any reason
* Add node range customization when noderange flavour is enabled (default 8 nodes)
* Limit nodes range & disable chat message sending by default
* Bump protocol version
Add 'biome_zero_level' argument to 'generateBiomes()', 'deco_zero_level'
argument to 'placeAllDecos()' and 'ore_zero_level' to 'placeAllOres()'
to allow mapgens to vertically shift the registered biomes, decorations
and ores per-mapchunk.
Will also allow many realm possibilities in future mapgens.
Useful for underwater plants.
Node consists of a base cube plus a plantlike extension that can pass through
liquid nodes above without creating air bubbles or interfering with liquid flow.
Uses paramtype2 'leveled', param2 defines height of plantlike extension.
This commit introduces Raycast, a Lua user object, which can be
used to perform a raycast on the map. The ray is continuable, so one can
also get hidden nodes (for example to see trough glass).
The 'absheight' flag was added years ago for the floatlands of 'indev'
mapgen (now deleted). The feature mirrored all ore placement around y = 0
to place ores in floatlands.
In MTG we now use dedicated ore registrations for floatlands.
The feature is crude, inflexible, problematic and very rarely used, it
also makes ore vertical range code more complex.
Minetest 0.5 is a good chance to remove the feature.
The flag itself remains to not break flag values.
The 'absheight' flag was added years ago for the floatlands of 'indev'
mapgen (now deleted). The feature mirrored all ore placement around y = 0
to place ores in floatlands.
In MTG we now use dedicated ore registrations for floatlands.
The feature is crude, inflexible, problematic and very rarely used, it
also makes ore vertical range code more complex.
Minetest 0.5 is a good chance to remove the feature.
The flag itself remains to not break flag values.
* Automatic item and node colorization
Now nodes with a palette yield colored item stacks, and colored items
place colored nodes by default. The client predicts the colorization.
* Backwards compatibility
* Use nil
* Style fixes
* Fix code style
* Document changes
Add minor bits of missing Lua API documentation.
Remove L-system lighting bug warning.
Clarify 2 lines in node timer documentation.
Fix many Markdown syntax errors in lua_api.txt.
* [CSM] Add send_chat_message and run_server_chatcommand API functions
* Add client-side chat message rate limiting
* Limit out chat queue size
* [CSM] Add minetest.clear_out_chat_queue API function and .clear_chat_queue chatcommand
* Last fixes/cleanups before merge
* Player attrs: permits to remove an attribute by setting value to nil
When doing player:set_attribute("attr", nil) remove attribute
Also remove a useless check on C++ API part (already done by checkplayer)
Fix#5709
Recent commit b6f4a9c7e1a4f0bac66fd6f6ff844425ac775975 removed a hardcoded
player collisionbox which resulted on falling back to an incorrect default.
This stopped players walking through 2-node high spaces and made the player
slightly wider.
Improve docs for custom player collisionbox feature and reformat nearby lines.
This unifies the settings APIs.
This also unifies the sync and async registration APIs, since the async
registration API did not support adding non-functions to the API table.
Default true.
Add 'm_clouds_enabled' bool to sky.h, set from new bool in 'set sky' API.
Make 'getCloudsVisible()' depend on 'm_clouds_enabled' instead of
'm_visible' (whether normal sky is visible).
Torches are dug instantly again.
When the digging time is 0, a delay of 0.15 seconds is added between digging nodes. If the left mouse button is released, the delay is set to 0, thus click-digging.
We introduce a new value for "waving" - 2:
0 - waving disabled
1 - wave like a plant
2 - wave like a leave
Plantlike nodes will only allow waving = 1, but for leaves we will
permit both 1 and 2 since current minetest_game sets it to 1 for
all leaves. This makes it somewhat backwards compatible.
For mesh and nodebox, values 1 and 2 are both valid, and the node
can wave in both fashions as desired.
I've tested this with the crops:corn plants, which are mesh nodes,
and the results are really good. The code change is trivial as
well, so I've opted to document the waving parameter in lua_api.txt
because it was missing from there.
Nodeboxes likely will not wave properly unless waving = 2. However
it's possible that waving=1 may be desired by some mod developers
for geometries I have not tried, so the code will not prohibit
either value for mesh and nodebox drawtypes.
Add lua_api.txt documentation for this feature and document both
the existing functionality and the expansion to mesh and nodebox
drawtypes.
* Fix incorrect formspec tooltip documentation
* Improve `floodable` and `on_flood` documentation.
The original documentation did not specify that liquids should not themselves be floodable. This is probably something that should be mentioned.
* Player data to Database
Add player data into databases (SQLite3 & PG only)
PostgreSQL & SQLite: better POO Design for databases
Add --migrate-players argument to server + deprecation warning
* Remove players directory if empty
The 'sneak glitch' physics override now controls whether a player can
use the new move code replications of the old sneak side-effects:
sneak ladders and 2 node sneak jump. This completes our intention to
replicate the old sneak side-effects in new code and provide them as
an option that is disabled by default.
This callback is called if a liquid definitely floods a non-air
node on the map. The callback arguments are (pos, oldnode, newnode)
and can return a `bool` value indicating whether flooding the
node should be cancelled (`return true` will prevent the node
from flooding).
Documentation is added, the callback function was tested with a
modified minetest_game.
Note that `return true` will likely cause the node's `on_flood()`
callback to be called every second until the node gets removed,
so care must be taken to prevent many callbacks from using this
return value. The current default liquid update interval is 1.0
seconds, which isn't unmanageable.
The larger aim of this patch is to remove the lava cooling ABM,
which is a significant cost to idle servers that have lava on their
map. This callback will be much more efficient.
This is not really different from the light update of a voxel
manipulator. This update does not assume that the lighting was correct
before, therefore it is useful for correction.
Also expose this function to the Lua API for light correction, and
allow voxel manipulators not to update the light.
Temporary option for the old move code for specific old sneak behaviour.
Enabled by setting the added 'new move' physics override to false.
By default 'new move' is true.
* [CSM] Add function to set minimap shape
Also deprecates `toggle_shape`.
* Oh fish, I messed that one up!
* Fix Style
* Sorry, I missed something
I still had the `luamethod` call in there!
* Add getters
* Remove extra line
* Remove useless variable
Please review again @nerzhul . Thanks!
* Satisfy nerzhul
Adds the possibility to colorize item stacks based on their metadata.
In the item/node definition you can specify palette (an image file)
and color (fallback color if the item has no palette or metadata).
Then you can add palette_index to the metadata.
Dropped itemstacks with different colors do not merge.
Add the missing paramtype2 for param2 controlling the liquid level
inside the glasslike_framed drawtype.
Add missing documentation of the feature to lua_api.txt.
Update and improve comments for drawtype enumerations in nodedef.h.
* squashed: CSM: Implement register_globalstep
* Re-use fatal error mechanism from server to disconnect client on CSM error
* Little client functions cleanups
* squashed: CSM: add core.after function
* core.after is shared code between client & server
* ModApiUtil get_us_time feature enabled for client
This commit introduces a new bulk node lighting algorithm to minimize
lighting bugs during l-system tree generation, schematic placement and
non-mapgen-object lua voxelmanip light calculation.
If the block above the changed area is not loaded, it gets loaded to avoid
lighting bugs.
Light is updated as soon as write_to_map is called on a voxel manipulator,
therefore update_map does nothing.
* mod can create a ModMetadata object where store its values and retrieve it.
* Modmetadata object can only be fetched at mod loading
* Save when modified using same time as map interval or at server stop
* add helper function to get mod storage path
* ModMetadata has exactly same calls than all every other Metadata
* This backend permit mods to store extra players attributes to a common interface.
* Add the obj:set_attribute(attr, value) Lua call
* Add the obj:get_attribute(attr) Lua call
Examples:
* player:set_attribute("home:home", "10,25,-78")
* player:get_attribute("default:mana")
Attributes are saved as a json in the player file in extended_attributes
key
They are saved only if a modification on the attributes occurs and loaded
when emergePlayer is called (they are attached to PlayerSAO).
- Increase ContentFeatures serialization version
- Color property and palettes for nodes
- paramtype2 = "color", "colored facedir" or "colored wallmounted"
Introduces two functions to unregister and override chatcommands.
minetest.unregister_chatcommand("<name>") and
minetest.override_chatcommand("<name>", {<redifinition>})
"[sheet:WxH:X,Y" assumes the base image is a tilesheet with W*H tiles
on it and crops to the tile at position X,Y. Basically it works
like "[verticalframe" but in 2D.
For testing, I combined the four default_chest images into one.
* Calculate maximum interact distance from wielded tool
* New "interacted_while_dead" cheat_type for the Lua API
* Disallow dropping items while dead
* Move player to spawn before resurrecting them
Schematics can already be placed with a param2 value, but not
simple 1-node plant decorations of the simple type.
This adds a `param2` field to the simple deco type that is
checked to be between 0 and 255, and put to the placed node
at mapgen.
This can be used to put a degrotate value in, or e.g. a fill
value for leveltype nodes, or a place_param2 value at mapgen
placement, or vary the shape of meshoptions plantlike drawtype.
This combats the problem of sending the hundreds of
"creative" / "armor" or whatever detached invs that
exist on popular servers to each and every player
on join or on change of said invs.
Position, velocity and acceleration vectors of particles are rotated
by the yaw of the parent object so that they are truly relative to it.
Clarify new attached particle spawner behavior in lua_api.txt.
If a tool wears out and is destroyed, it's itemstack count
goes to 0, and we can optionally play a breaking sound.
This patch implements playing a breaking sound when this
occurs. Sounds need to be added to the tool itemdef
registration as the sound name string in the .sound.breaks
member.
Custom (non-engine) field names of items and entities are allowed.
This is now documented in lua_api.txt. Field names beginning with
an underscore are now reserved for mod use, the engine must not
introduce any fields beginning with an underscore.
Now, the renamed forms of nodeupdate and nodeupdate_single are part of the official API.
As nodeupdate has been used by Minetest Game and in mods despite of not
being part of the official API, we ease the transition by still supporting
it for the 0.4.15 release. After the release, the two functions can be removed.
The removal will not violate the stability promise, as that promise only
includes the official and documented API.
Also, make some formerly global functions local. They most likely haven't
been used by mods, therefore they won't get stubs with deprecation warnings,
hard erroring directly.
Add missing documentation for 'register_biome' and
'clear_registered_biomes'.
Add documentation for 'nodeupdate_single'. 'nodeupdate'
is not yet documented due to a bug it causes.
Add 'core.LIGHT_MAX = 14' to builtin/game/constants.lua with the intention
to replace misplaced 'default.LIGHT_MAX = 14' in Minetest Game.
Add comment in light.h requiring the constant be changed in both places.
Add lighting bug warning to note in lua_api.txt.
There are hundreds of mod uses of 15 which causes a lighting bug.
Inverts the given channels of the base image.
Mode may contain the characters "r", "g", "b", "a".
Only the channels that are mentioned in the mode string will be inverted.
Adds several new ways that the plantlike drawtype mesh can be changed.
This requires paramtype2 = "meshoptions" to be set in the node
definition. The drawtype for these nodes should be "plantlike".
These modifications are all done using param2. This field is now
a complex bitfield that allows some or more of the combinations to
be chosen, and the mesh draw code will choose the options based as
neeeded for each plantlike node.
bit layout:
bits 0, 1 and 2 (values 0x1 through 0x7) are for choosing the plant
mesh shape:
0 - ordinary plantlike plant ("x" shaped)
1 - ordinary plant, but rotated 45 degrees ("+" shaped)
2 - a plant with 3 faces ("*" shaped)
3 - a plant with 4 faces ("#" shaped)
4 - a plant with 4 faces ("#" shaped, leaning outwards)
5 through 7 are unused and reserved for future mesh shapes.
bit 3 (0x8) causes the plant to be randomly offset in the x,z
plane. The plant should fall within the 1x1x1 nodebox if regularly
sized.
bit 4 (0x10) causes the plant mesh to grow by sqrt(2), and will cause
the plant mesh to fill out 1x1x1, and appear slightly larger. Texture
makers will want to make their plant texture 23x16 pixels to have the
best visual fit in 1x1x1 size.
bit 5 (0x20) causes each face of the plant to have a slight negative
Y offset in position, descending up to 0.125 downwards into the node
below. Because this is per face, this causes the plant model to be
less symmetric.
bit 6 (0x40) through bit 7 (0x80) are unused and reserved for
future use.
!(https://youtu.be/qWuI664krsI)
