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Make ShiftExistingBiomes available via API (#40)

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* 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
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8
mapgen_mantle.lua
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@ -119,7 +119,7 @@ mapgen.add_basalt_columns = function(data, area, minp, maxp)
local yStride = area.ystride
local yCaveStride = x1 - x0 + 1
local cavePerlin = mapgen.getCavePointPerlin()
local cavePerlin = mapgen.get_cave_point_perlin()
nobj_basalt = nobj_basalt or minetest.get_perlin_map(np_basalt, {x = yCaveStride, y = yCaveStride})
local nvals_basalt = nobj_basalt:get_2d_map_flat({x=minp.x, y=minp.z}, {x=yCaveStride, y=yCaveStride}, nbuf_basalt)
@ -431,13 +431,13 @@ mapgen.RegionEnum = {
-- Returns (region, noise) where region is a value from mapgen.RegionEnum
-- and noise is the unadjusted cave perlin value
mapgen.getRegion = function(pos)
mapgen.get_region = function(pos)
if pos.y > nether.DEPTH_CEILING or pos.y < nether.DEPTH_FLOOR then
return mapgen.RegionEnum.OVERWORLD, nil
end
local caveNoise = mapgen.getCavePerlinAt(pos)
local caveNoise = mapgen.get_cave_perlin_at(pos)
local sealevel, cavern_limit_distance = mapgen.find_nearest_lava_sealevel(pos.y)
local tcave_adj, centerRegionLimit_adj = mapgen.get_mapgenblend_adjustments(pos.y)
local tcave = mapgen.TCAVE + tcave_adj
@ -482,7 +482,7 @@ minetest.register_chatcommand("nether_whereami",
if player == nil then return false, S("Unknown player position") end
local playerPos = vector.round(player:get_pos())
local region, caveNoise = mapgen.getRegion(playerPos)
local region, caveNoise = mapgen.get_region(playerPos)
local seaLevel, cavernLimitDistance = mapgen.find_nearest_lava_sealevel(playerPos.y)
local tcave_adj, centerRegionLimit_adj = mapgen.get_mapgenblend_adjustments(playerPos.y)