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ns_cavegen
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Update & improve documentation

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Bram van den Heuvel 2024-09-11 12:13:36 +02:00
parent f718768235
commit 25a72b62a4
4 changed files with 56 additions and 61 deletions
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21
API.md
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@ -48,16 +48,6 @@ The shapes are defined as follows:
-- | | |
-- massive caves only smaller caves always cave
func = function(pos, n)
return 2 * n
end,
-- Function to edit the NoiseParams based on some operation.
-- Keep in mind that this function will be run many, many times, so it is
-- best to keep this function as trivial as possible.
-- The function receives a node's position `pos` and the noise value `n`,
-- and it is expected to return an updated noise value.
-- If absent, the noise value is used as-is.
y_min = -31000,
y_max = 31000,
-- Lower and upper limits for cave shapes.
@ -250,7 +240,6 @@ The decorations are defined as follows:
-- Rotation can be "0", "90", "180", "270", or "random"
place_offset_y = 0,
-- If the flag 'place_center_y' is set this parameter is ignored.
-- Y offset of the schematic base node layer relative to the 'place_on'
-- node.
-- Can be positive or negative. Default is 0.
@ -265,13 +254,3 @@ The decorations are defined as follows:
This mod does not support adding ores to the caves, as this is a feature that
is already well-supported by the Minetest Lua API and doesn't need a mod like
this.
## Misc
In case you wish to do a few other operations, here's a few other functions
that might be helpful to you:
- `ns_cavegen.set_world_depth(h)` Set the world's depth to a given number.
This feature is currently only supported in VoxeLibre. Contributions that help
change the world depth in other games, are very welcome.

2
README.md
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@ -11,7 +11,7 @@ custom caves into the world and to lower the world depth.
The mod has been tested on the following games:
- [x] MineClone2
- [x] VoxeLibre
- [ ] Mineclonia
- [ ] MTG

4
mod.conf
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@ -2,5 +2,5 @@ name=ns_cavegen
description=A custom cave generator engine
author=Noordstar
title=Cave Generator
depends=dripstone,mcl_init
optional_depends=mcl_init,mcl_worlds
depends=
optional_depends=

90
script.lua
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@ -8,21 +8,10 @@ local BIOME_SIZE = { x = 250, y = 250, z = 250 }
-- on a vertical scale, and barely on a horizontal scale.
local CONNECTIVITY_BLOB = { x = 250, y = 100, z = 250 }
local ENUM_AIR = 1
local ENUM_CEILING = 2
local ENUM_CEILING_DECORATION = 3
local ENUM_FLOOR = 4
local ENUM_FLOOR_DECORATION = 5
local ENUM_STONE = 6
local ENUM_WALL = 7
-- Point that is so out of the normal connectivity/verticality scope (0 - 100)
-- that it is only selected when no other items are registered.
local OUTLANDISH_POINT = -1e3
-- Average size of each cave shape
local SHAPE_SIZE = { x = 128, y = 128, z = 128 }
-- Several seeds for mapgen
local SEED_CONNECTIVITY = 297948
local SEED_HEAT = 320523
@ -198,16 +187,26 @@ function internal.clean_shape_def(def)
def.y_min = def.y_min or WORLD_MINP.y
def.y_max = def.y_max or WORLD_MAXP.y
def.func = def.func or function(_, n) return n end
assert(type(def.y_min) == "number")
assert(type(def.y_max) == "number")
assert(type(def.func) == "function")
assert(def.noise_params == nil or type(def.noise_params) == "table")
return def
end
function internal.clear_registered_biomes()
ns_cavegen.registered_biomes = {}
end
function internal.clear_registered_decorations()
ns_cavegen.registered_decorations = {}
end
function internal.clear_registered_shapes()
ns_cavegen.registered_shapes = {}
end
-- Get connectivity noise params
function internal.connectivity_noise_params()
local factor = math.max(1, math.abs(#ns_cavegen.registered_shapes) ^ 0.5)
@ -244,7 +243,6 @@ function internal.default_shape()
{ name = "ns_cavegen:none"
, connectivity_point = OUTLANDISH_POINT
, verticality_point = OUTLANDISH_POINT
, func = function (pos, v) return 0 end
}
)
end
@ -257,7 +255,7 @@ function internal.euclidian(x1, x2, y1, y2)
end
-- For each node, determine which cave biome they're in.
function internal.find_biome_allocations(heat, humidity)
function internal.find_biome_allocations(heat, humidity, va)
assert(#heat == #humidity)
local allocs = {}
@ -278,8 +276,12 @@ function internal.find_biome_allocations(heat, humidity)
)
if def_d < d then
d = def_d
biome_name = name
local pos = va:position(i)
if VoxelArea:new(def.min_pos, def.max_pos):contains(pos.x, pos.y, pos.z) then
d = def_d
biome_name = name
end
end
end
@ -290,7 +292,7 @@ function internal.find_biome_allocations(heat, humidity)
end
-- For each node, determine which cave shape they follow.
function internal.find_shape_allocations(connectivity, verticality)
function internal.find_shape_allocations(connectivity, verticality, va)
assert(#connectivity == #verticality)
local allocs = {}
@ -311,8 +313,12 @@ function internal.find_shape_allocations(connectivity, verticality)
)
if def_d < d then
d = def_d
shape_name = name
local pos = va:position(i)
if VoxelArea:new(def.min_pos, def.max_pos):contains(pos.x, pos.y, pos.z) then
d = def_d
shape_name = name
end
end
end
@ -450,8 +456,13 @@ function internal.mapgen(vm, minp, maxp, blockseed)
-- bordering nodes in different chunks.
local bminp = vector.offset(minp, -1, -1, -1)
local bmaxp = vector.offset(maxp, 1, 1, 1)
local bva = VoxelArea(bminp, bmaxp)
-- Initiate VoxelArea objects
local va = VoxelArea(vm:get_emerged_area())
local bva = VoxelArea(bminp, bmaxp)
local sva = VoxelArea(minp, maxp)
-- Set seed
math.randomseed(blockseed)
-- Find cave shape params
@ -459,7 +470,7 @@ function internal.mapgen(vm, minp, maxp, blockseed)
local verticality = internal.generate_verticality_noise(bminp, bmaxp)
-- Draw cave shapes
local used_shapes = internal.find_shape_allocations(connectivity, verticality)
local used_shapes = internal.find_shape_allocations(connectivity, verticality, bva)
internal.find_shape_values(used_shapes, bminp, bmaxp, bva)
internal.shape_to_air(used_shapes, bminp, bmaxp, bva)
@ -467,28 +478,14 @@ function internal.mapgen(vm, minp, maxp, blockseed)
local heat = internal.generate_heat_noise(minp, maxp)
local humidity = internal.generate_humidity_noise(minp, maxp)
-- -- DEBUG: Write to air (or not)
-- local air = 0
-- for i in small_va:iterp(minp, maxp) do
-- if used_shapes[i] == true then
-- local pos = small_va:position(i)
-- local vmi = va:index(pos.x, pos.y, pos.z)
-- data[vmi] = minetest.CONTENT_AIR
-- air = air + 1
-- end
-- end
-- Classify various nodes as walls, floors, ceilings
local classified_nodes = internal.classify_nodes(used_shapes, bminp, bmaxp)
-- Draw cave biomes
local used_biomes = internal.find_biome_allocations(heat, humidity)
local used_biomes = internal.find_biome_allocations(heat, humidity, sva)
-- Manipulate `data` table by adding classified nodes based on which biome
-- they're in.
local sva = VoxelArea(minp, maxp)
local data = vm:get_data()
local ground = { [ minetest.CONTENT_AIR ] = false }
@ -796,6 +793,15 @@ function internal.write_simple_ceiling_decorations(vm_data, va, used_biomes, cla
return claimed_spots
end
function internal.unregister_biome(name)
ns_cavegen.registered_biomes[name] = nil
end
function internal.unregister_shape(name)
ns_cavegen.registerd_shapes[name] = nil
end
function internal.write_simple_floor_decorations(vm_data, va, used_biomes, classified_nodes, sva)
local claimed_spots = {}
@ -870,6 +876,12 @@ ns_cavegen = {
return 1 - (math.abs(y - d) / d)
end,
clear_registered_biomes = internal.clear_registered_biomes,
clear_registered_decorations = internal.clear_registered_decorations,
clear_registered_shapes = internal.clear_registered_shapes,
register_biome = internal.register_biome,
register_decoration = internal.register_decoration,
@ -881,6 +893,10 @@ ns_cavegen = {
registered_decorations = {},
registered_shapes = {},
unregister_biome = internal.unregister_biome,
unregister_shape = internal.unregister_shape,
}
-- dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/lua/register.lua")