minetest-mods/nether
1
0
Fork 1
mirror of https://github.com/minetest-mods/nether.git synced 2025-07-03 08:50:32 +02:00
Code Issues Releases Wiki Activity

Make ShiftExistingBiomes available via API (#40)

Browse Source 
* bug fixes

Fixes wrong new_y_min when shift_existing_biomes() shifts a biome below the nether floor,
find_surface_anchorPos() no longer assumes y=0 will be outside the nether.
Nil-reference fixed when a mods tries to register a portal after mods are finished loading, but the portal shape+material was already registered by another mod.

* Make ShiftExistingBiomes available via API

makes the ShiftExistingBiomes function available to other mods via the nether global, since it's not a simple function and biomes would also need to be shifted if another mod wants to add a second nether layer.

* Allow layers to extend the depth of nether effects

Mods can set/lower nether.DEPTH_FLOOR_LAYERS when creating a layer under the nether. This allows multiple layer mods to know where their ceiling should start, and to be included in the effects which only happen in the nether.

* document nether API

More of a tentative interop guide than an API.
Use snake_case for API functions.
This commit is contained in:
Treer
2021-07-18 16:44:37 +10:00
committed by GitHub
parent 54613d673a
commit 52038017f3
8 changed files with 122 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
mapgen.lua
View File

@ -81,7 +81,8 @@ local math_max, math_min, math_abs, math_floor = math.max, math.min, math.abs, m
-- Inject nether_caverns biome
local function override_underground_biomes()
-- Move any existing biomes out of the y-range specified by 'floor_y' and 'ceiling_y'
mapgen.shift_existing_biomes = function(floor_y, ceiling_y)
-- https://forum.minetest.net/viewtopic.php?p=257522#p257522
-- Q: Is there a way to override an already-registered biome so I can get it out of the
-- way of my own underground biomes without disturbing the other biomes registered by
@ -124,21 +125,21 @@ local function override_underground_biomes()
if type(new_biome_def.y_min) == 'number' then biome_y_min = new_biome_def.y_min end
if type(new_biome_def.y_max) == 'number' then biome_y_max = new_biome_def.y_max end
if biome_y_max > NETHER_FLOOR and biome_y_min < NETHER_CEILING then
if biome_y_max > floor_y and biome_y_min < ceiling_y then
-- This biome occupies some or all of the depth of the Nether, shift/crop it.
local new_y_min, new_y_max
local spaceOccupiedAbove = biome_y_max - NETHER_CEILING
local spaceOccupiedBelow = NETHER_FLOOR - biome_y_min
local spaceOccupiedAbove = biome_y_max - ceiling_y
local spaceOccupiedBelow = floor_y - biome_y_min
if spaceOccupiedAbove >= spaceOccupiedBelow or biome_y_min <= -30000 then
-- place the biome above the Nether
-- We also shift biomes which extend to the bottom of the map above the Nether, since they
-- likely only extend that deep as a catch-all, and probably have a role nearer the surface.
new_y_min = NETHER_CEILING + 1
new_y_max = math_max(biome_y_max, NETHER_CEILING + 2)
new_y_min = ceiling_y + 1
new_y_max = math_max(biome_y_max, ceiling_y + 2)
else
-- shift the biome to below the Nether
new_y_max = NETHER_FLOOR - 1
new_y_min = math_min(biome_y_min, NETHER_CEILING - 2)
new_y_max = floor_y - 1
new_y_min = math_min(biome_y_min, floor_y - 2)
end
debugf("Moving biome \"%s\" from %s..%s to %s..%s", new_biome_def.name, new_biome_def.y_min, new_biome_def.y_max, new_y_min, new_y_max)
@ -162,7 +163,7 @@ local function override_underground_biomes()
end
-- Shift any overlapping biomes out of the way before we create the Nether biomes
override_underground_biomes()
mapgen.shift_existing_biomes(NETHER_FLOOR, NETHER_CEILING)
-- nether:native_mapgen is used to prevent ores and decorations being generated according
-- to landforms created by the native mapgen.
@ -259,12 +260,12 @@ mapgen.np_cave = {
local cavePointPerlin = nil
mapgen.getCavePointPerlin = function()
mapgen.get_cave_point_perlin = function()
cavePointPerlin = cavePointPerlin or minetest.get_perlin(mapgen.np_cave)
return cavePointPerlin
end
mapgen.getCavePerlinAt = function(pos)
mapgen.get_cave_perlin_at = function(pos)
cavePointPerlin = cavePointPerlin or minetest.get_perlin(mapgen.np_cave)
return cavePointPerlin:get_3d(pos)
end
@ -477,7 +478,7 @@ end
-- use knowledge of the nether mapgen algorithm to return a suitable ground level for placing a portal.
-- player_name is optional, allowing a player to spawn a remote portal in their own protected areas.
function nether.find_nether_ground_y(target_x, target_z, start_y, player_name)
local nobj_cave_point = mapgen.getCavePointPerlin()
local nobj_cave_point = mapgen.get_cave_point_perlin()
local air = 0 -- Consecutive air nodes found
local minp_schem, maxp_schem = nether.get_schematic_volume({x = target_x, y = 0, z = target_z}, nil, "nether_portal")