mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-12-01 03:23:54 +01:00
35 lines
1.7 KiB
Lua
35 lines
1.7 KiB
Lua
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-- ███ ███ █████ ██ ██ ███████ ██████ ██████
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-- ████ ████ ██ ██ ██ ██ ██ ██ ██ ██
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-- ██ ████ ██ ███████ █████ █████ █████ ██ ██
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-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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-- ██ ██ ██ ██ ██ ██ ███████ ███████ ███████ ██████
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-- Generate a flat array of 2D noise.
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-- Written with help from https://www.redblobgames.com/maps/terrain-from-noise/
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-- @param size Vector An x/y vector representing the size of the noise area to generate.
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-- @param params table|table<table> A table of noise params to use to generate the noise. Values that aren't specified are filled in automatically. If a table of tables is specified, it is interpreted as multiple octaves of noise to apply in sequence.
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function worldeditadditions.noise.make_2d(size, params)
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local result = {}
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local generator;
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if params.algorithm == "perlin" then
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generator = worldeditadditions.noise.perlin.new()
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else -- We don't have any other generators just yet
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return false, "Error: Unknown noise algorithm '"..params.."' (available algorithms: perlin)."
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end
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for x=params.offset.x, params.offset.x+size.x do
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for y=params.offset.y, params.offset.y+size.y do
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local result = 0
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for i,params_octave in ipairs(params) do
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result = result + (generator:noise(x * scale.x, y * scale.y, 0) ^ params.exponent) * params.multiply + params.add
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end
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result[y*size.x + x] = result
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end
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end
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return result
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end
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