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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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portal_examples.lua
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@ -106,7 +106,7 @@ end
-- Surface-travel portal, playable code example --
--==============================================--
-- These Moore Curve functions requred by surface_portal's find_surface_anchorPos() will
-- These Moore Curve functions required by surface_portal's find_surface_anchorPos() will
-- be assigned later in this file.
local get_moore_distance -- will be function get_moore_distance(cell_count, x, y): integer
local get_moore_coords -- will be function get_moore_coords(cell_count, distance): pos2d