mirror of
https://github.com/Refactorio/RedMew.git
synced 2024-12-14 10:13:13 +02:00
57 lines
2.1 KiB
Lua
57 lines
2.1 KiB
Lua
-- Inspired/copied from Beach.
|
|
|
|
local b = require 'map_gen.shared.builders'
|
|
local perlin = require 'map_gen.shared.perlin_noise'
|
|
local Global = require 'utils.global'
|
|
local math = require 'utils.math'
|
|
|
|
-- A "very small" starting area is advised at the default 100 width.
|
|
local play_area_width = 100 -- The approximate width of the play area
|
|
local oob_tile = 'out-of-map' -- The tiles that make up the out of bounds/world border. Recommended are out-of-map or water.
|
|
|
|
local oob_width = 233
|
|
local oob_width_inv = math.tau / oob_width
|
|
|
|
-- Perlin options
|
|
local noise_variance = 0.020 --The lower this number the smoother the curve is gonna be
|
|
local oob_noise_level = 15.25 --Factor for the magnitude of the curve
|
|
|
|
-- Leave nil and they will be set based on the map seed.
|
|
local perlin_seed_1 = nil
|
|
local perlin_seed_2 = nil
|
|
|
|
Global.register_init(
|
|
{},
|
|
function(tbl)
|
|
local seed = game.surfaces[1].map_gen_settings.seed
|
|
tbl.perlin_seed_1 = perlin_seed_1 or seed
|
|
tbl.perlin_seed_2 = perlin_seed_2 or seed * 2
|
|
end,
|
|
function(tbl)
|
|
perlin_seed_1 = tbl.perlin_seed_1
|
|
perlin_seed_2 = tbl.perlin_seed_2
|
|
end
|
|
)
|
|
|
|
local function oob_shape(x, y)
|
|
local p = perlin.noise(x * noise_variance, y * noise_variance, perlin_seed_2) * oob_noise_level
|
|
p = p + math.sin(x * oob_width_inv + 179) * 15
|
|
return p > y
|
|
end
|
|
|
|
-- Turn the tiles included in the out of bounds to the oob tile.
|
|
oob_shape = b.change_tile(oob_shape, true, oob_tile)
|
|
|
|
-- Offset the oob from the middle of the map/playing area
|
|
oob_shape = b.translate(oob_shape, 0, -(play_area_width/2))
|
|
|
|
--[[ Make up the map from 3 components: the oob shape we created (which covers the NW), a copy of the oob shape which is
|
|
flipped (to cover the SE) and then translated so that the crests and valleys of the noise creates a nice wave.
|
|
Lastly, any part of the map that isn't in oob_shape or the oob_copy is filled by full_shape which just passes the
|
|
vanilla mapgen through. ]]--
|
|
local map = b.any {oob_shape, b.translate(b.flip_y(oob_shape), (oob_width/2), 0), b.full_shape}
|
|
|
|
map = b.rotate(map, math.rad(45))
|
|
|
|
return map
|