forked from mtcontrib/plantlife_modpack
169 lines
6.8 KiB
Plaintext
169 lines
6.8 KiB
Plaintext
This document briefly describes the Plantlife API.
|
|
|
|
=========
|
|
Functions
|
|
=========
|
|
|
|
There are five main functions defined by this mod:
|
|
|
|
spawn_on_surfaces()
|
|
grow_plants()
|
|
plant_valid_wall()
|
|
is_node_loaded()
|
|
dbg()
|
|
|
|
-----
|
|
The first of these, spawn_on_surfaces() is defined with quite a large number
|
|
of variables:
|
|
|
|
spawn_on_surfaces = function(sdelay, splant, sradius, schance, ssurface,
|
|
savoid, seed_diff, lightmin, lightmax, nneighbors,
|
|
ocount, facedir)
|
|
|
|
The first several of these are all required, and are from the last version of
|
|
the flowers mod, so this part of the API should be the same as before.
|
|
|
|
sdelay: The value passed to the ABM's interval parameter, usually in the
|
|
1000-3000 range.
|
|
splant: The node name of the item to spawn (e.g. "flowers:flower_rose").
|
|
Note that if the plant is "poisonivy:seedling", and it's next to
|
|
a wall at spawn time, it automatically becomes the wall-climbing
|
|
variety. A plant will of course only be spawned if the node about
|
|
to be replaced is air.
|
|
sradius: Don't spawn within this many nodes of the avoid items mentioned
|
|
below.
|
|
schance: The value passed to the ABM's chance parameter, normally in the
|
|
10-100 range.
|
|
ssurface: Table with the names of the nodes on which to spawn the plant in
|
|
question, such as {"default:sand","default:dirt_with_grass"}. It
|
|
is not recommended to put "default:dirt" or "default:stone" into
|
|
this table if you can do without it, as this will cause the engine
|
|
to process potentially large numbers of such nodes when deciding
|
|
when to execute the ABM.
|
|
savoid: Table with a list of groups and/or node names to avoid when
|
|
spawning the plant, such as {"group:flowers","default:tree"}.
|
|
|
|
From here down are several optional parameters. You can use as many as you
|
|
need, but you must specify them in order (so if you want lightmax, you need
|
|
lightmin and seed_diff also, but not the rest).
|
|
|
|
seed_diff: The perlin seed difference value passed to the
|
|
minetest.env:get_perlin() function. Used along with the global
|
|
perlin controls below to create the "biome" in which the plants
|
|
will spawn. Usually a value of somewhere in the 10 to 100 range
|
|
is good. Defaults to 0 if not provided
|
|
lightmin: Minimum amount of light necessary to make a plant spawn. Defaults
|
|
to 0.
|
|
lightmax: Maximum amount of light present to allow a plant to spawn.
|
|
Defaults to the engine's MAX_LIGHT value of 14.
|
|
nneighbors: Table with a list of neighboring nodes, passed to the ABM as the
|
|
"neighbors" parameter, indicating what needs to be next to the
|
|
node the plant is about to spawn on, such as
|
|
{"default:stone","default:water_source"}. Defaults to the value
|
|
of ssurface if not provided.
|
|
ocount: There must be at least this many of the above neighbors around the
|
|
node the plant is about to spawn on for it to happen. Defaults to
|
|
0.
|
|
facedir: The value passed to the param2 variable when adding the plant node
|
|
to the map. Defaults to 0.
|
|
|
|
-----
|
|
The second function, grow_plants() is defined like so:
|
|
|
|
grow_plants = function(gdelay, gchance, gplant, gresult,
|
|
dry_early_node, grow_nodes)
|
|
|
|
gdelay: Passed as the ABM "interval" parameter, as with spawning.
|
|
gchance: Passed as the ABM "chance" parameter.
|
|
gplant: Name of the node being grown. This value is passed as the
|
|
only item in the table given to the ABM as the nodenames
|
|
parameter, so it is the plants themselves that are the ABM
|
|
trigger, rather than the ground they spawned on. A plant
|
|
will only grow if the node above it is air.
|
|
gresult: Name of the node into which the above should transform when
|
|
the ABM executes.
|
|
dry_early_node: This value is ignored except for jungle grass, where it
|
|
indicates which node the grass must be on in order for it to
|
|
turn from "short" to default:dry_shrub.
|
|
grow_nodes: This node must be under the plant in order for it to grow at
|
|
all. Normally this should be the same as the list of
|
|
surfaces passed to the spawning ABM as the "nodenames"
|
|
parameter, such as
|
|
{"default:dirt_with_grass","default:sand"}. This is so that
|
|
the plant can be manually placed on something like a flower
|
|
pot or something without it growing and eventually dieing.
|
|
facedir: Same as with spawning a plant. If supplied, this value is
|
|
passed to the param2 variable when changing the plant. If nil
|
|
or left out, no new param2 value is applied.
|
|
|
|
-----
|
|
plant_valid_wall() expects only a single parameter, "pos", which is a table
|
|
indicating the X,Y,Z coordinates to search for nearby adjacent walls. This
|
|
function returns the location of the first wall found as a facedir value, or
|
|
nil if there are no adjacent walls.
|
|
|
|
-----
|
|
is_node_loaded() is defined in exactly the same manner (that is, "node_pos" is
|
|
a set of coordinates), and acts as a wrapper for the
|
|
minetest.env:get_node_or_nil(node_pos) function. Returns true if the node in
|
|
question is already loaded, or false if not.
|
|
|
|
-----
|
|
dbg() is a simple debug output function which takes one string parameter. It
|
|
just checks if plantlife_debug is true and outputs the phrase "[Plantlife] "
|
|
followed by the supplied string, via the print() function.
|
|
|
|
|
|
===============
|
|
Global Settings
|
|
===============
|
|
|
|
These first three allow you to turn the various classes of plants on or off.
|
|
By default, all three are "true", thus turning all three classes on.
|
|
|
|
enable_flowers = true
|
|
enable_junglegrass = true
|
|
enable_poisonivy = true
|
|
|
|
Enable this if you want the mod to spam your console with debug info :-)
|
|
|
|
plantlife_debug = false
|
|
|
|
The mod uses perlin noise to create "biomes" of the various plants. Aside
|
|
from plantlife_seed_diff (see below), these values are the ones plugged
|
|
directly into the minetest.env:get_perlin() function. For more information on
|
|
how perlin noise is generated, you will need to search the web, as these
|
|
default values were arrived at through trial and error.
|
|
|
|
plantlife_seed_diff = 123
|
|
perlin_octaves = 3
|
|
perlin_persistence = 0.2
|
|
perlin_scale = 25
|
|
|
|
This value is compared against the output of the above perlin noise function
|
|
to decide when to actually place a plant. Smaller numbers mean larger biomes
|
|
and more abundant plants.
|
|
|
|
plantlife_limit = 0.6
|
|
|
|
These two control the basic ABM settings for spawning plants - spawn_delay
|
|
is used as the 'interval' parameter and controls how often to run the ABM (in
|
|
in-game tenths of seconds), while spawn_chance is used for the ABM's "chance"
|
|
parameter, and is basically how likely the ABM is to actually execute
|
|
(a 1:(1/chance) probability).
|
|
|
|
spawn_delay = 2000
|
|
spawn_chance = 100
|
|
|
|
These next two control the same two settings used by the growing ABM.
|
|
|
|
grow_delay = 1000
|
|
grow_chance = 10
|
|
|
|
These three are pretty obvious :-)
|
|
|
|
flowers_seed_diff = plantlife_seed_diff
|
|
junglegrass_seed_diff = plantlife_seed_diff + 10
|
|
poisonivy_seed_diff = plantlife_seed_diff + 10
|
|
|