mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-11-01 05:43:01 +00:00
57 lines
2.2 KiB
Lua
57 lines
2.2 KiB
Lua
local wea = worldeditadditions
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local wea_c = worldeditadditions_core
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local Vector3 = wea_c.Vector3
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--- Makes sure that the default settings are all present in the given params table.
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-- This way not all params have to be specified by the user.
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-- @param params table The params table generated from the user's input.
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-- @return table A NEW table with all the missing properties filled in with the default values.
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function worldeditadditions.noise.params_apply_default(params)
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local params_default = {
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-- How to apply the noise to the heightmap. Different values result in
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-- different effects:
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-- - The exact string "add": Noise values are added to each heightmap pixel.
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-- - The exact string "multiply": Each heightmap pixel is multiplied by the corresponding noise value.
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-- - A string in the form of digits followed, then the noise will is remapped from the range 0 - 1 to the range -1 - +1 and multiplied by this number / 2, and then for each pixel in the heightmap the corresponding noise value will be added to it.
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apply = 5,
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-- The backend noise algorithm to use
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algorithm = "perlinmt",
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-- Zooms in and out
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scale = Vector3.new(1, 1, 1),
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-- Offset the generated noise by this vector.
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offset = Vector3.new(0, 0, 0),
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-- Apply this exponent to the resulting noise value
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exponent = 1,
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-- Multiply the resulting noise value by this number. Changes the "strength" of the noise
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multiply = 1,
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-- Add this number to the resulting noise value
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add = 0
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-- The seed to generate the noise with. nil = randomly chosen
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-- The perlin generator isn't currently seedable :-/
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-- seed = nil
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}
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if not params[1] then params = { params } end
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-- If params[1] is thing, this is a list of params
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-- This might be a thing if we're dealing with multiple octaves
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for i,params_el in ipairs(params) do
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local default_copy = wea_c.table.shallowcopy(params_default)
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-- Keyword support
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for _i, keyword in ipairs(wea.noise.engines.available) do
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if params_el[keyword] ~= nil then
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params_el.algorithm = keyword
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end
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end
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-- Apply this table to fill in the gaps
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wea_c.table.apply(
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params_el,
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default_copy
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)
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params[i] = default_copy
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end
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return params
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end
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