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Biomes/decorations/ores: Make relative to 'water_level' setting

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Add 'biome_zero_level' argument to 'generateBiomes()', 'deco_zero_level'
argument to 'placeAllDecos()' and 'ore_zero_level' to 'placeAllOres()'
to allow mapgens to vertically shift the registered biomes, decorations
and ores per-mapchunk.
Will also allow many realm possibilities in future mapgens.
This commit is contained in:
paramat 2017-06-14 02:00:51 +01:00 • committed by paramat
parent ef285b2815
commit 8299e4b67e
14 changed files with 90 additions and 43 deletions
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14
doc/lua_api.txt
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@ -4420,6 +4420,9 @@ Definition tables
-- ^ In this example, there is a 3x3x3 cluster where 8 out of the 27 nodes are coal ore
y_min = -31000,
y_max = 64,
-- ^ Lower and upper limits for ore.
-- ^ Limits are relative to y = water_level - 1 for core mapgen, or
-- ^ relative to y = 0 for minetest.generate_ores().
flags = "",
-- ^ Attributes for this ore generation
noise_threshold = 0.5,
@ -4429,7 +4432,7 @@ Definition tables
-- ^ Needed for sheet ore_type. Omit from scatter ore_type for a uniform ore distribution
random_factor = 1.0,
-- ^ Multiplier of the randomness contribution to the noise value at any
-- given point to decide if ore should be placed. Set to 0 for solid veins.
-- ^ given point to decide if ore should be placed. Set to 0 for solid veins.
-- ^ This parameter is only valid for ore_type == "vein".
biomes = {"desert", "rainforest"}
-- ^ List of biomes in which this decoration occurs. Occurs in all biomes if this is omitted,
@ -4467,6 +4470,7 @@ The Biome API is still in an experimental phase and subject to change.
y_min = 1,
y_max = 31000,
-- ^ Lower and upper limits for biome.
-- ^ Limits are relative to y = water_level - 1.
-- ^ Because biome is not recalculated for every node in a node column
-- ^ some biome materials can exceed their limits, especially stone.
-- ^ For each node column in a mapchunk, biome is only recalculated at column
@ -4509,9 +4513,11 @@ The Biome API is still in an experimental phase and subject to change.
-- ^ Can be a list of (or a single) biome names, IDs, or definitions.
y_min = -31000
y_max = 31000
-- ^ Minimum and maximum `y` positions these decorations can be generated at.
-- ^ This parameter refers to the `y` position of the decoration base, so
-- the actual maximum height would be `height_max + size.Y`.
-- ^ Lower and upper limits for decoration.
-- ^ Limits are relative to y = water_level - 1 for core mapgen, or
-- ^ relative to y = 0 for minetest.generate_decorations().
-- ^ This parameter refers to the `y` position of the decoration base, so
-- the actual maximum height would be `height_max + size.Y`.
spawn_by = "default:water",
-- ^ Node (or list of nodes) that the decoration only spawns next to.
-- ^ Checks two horizontal planes of neighbouring nodes (including diagonal neighbours),