local noise = require("noise")

data:extend{
    {
        type = "noise-expression",
        name = "lab-expr-1",
        expression = noise.define_noise_function(
            function(x, y, tile, map)
                return (((noise.ridge(x, 0, 1) - 0.5) *
                           (noise.ridge(y, 0, 1) - 0.5)) * 16 + 1)
            end)
    }, {
        type = "noise-expression",
        name = "lab-expr-2",
        expression = noise.define_noise_function(
            function(x, y, tile, map)
                return (((noise.ridge(x, 0, 1) - 0.5) *
                           (noise.ridge(y, 0, 1) - 0.5)) * -16 + 1)
            end)
    }
}

data.raw["tile"]["lab-dark-1"].autoplace =
    {
        default_enabled = false
    }
data.raw["tile"]["lab-dark-2"].autoplace =
    {
        default_enabled = false
    }

local mgp = data.raw["map-gen-presets"].default
mgp["lab-preset"] = {
    name = "lab-preset",
    order = "z",
    basic_settings = {
        property_expression_names = {
            ["tile:lab-dark-1:probability"] = "lab-expr-1",
            ["tile:lab-dark-1:probability"] = "lab-expr-2"
        },
        water = "none",
        cliff_settings = {richness = 0},
        default_enable_all_autoplace_controls = false,
        autoplace_controls = {},
        autoplace_settings = {
            tile = {
                settings = {
                    ["lab-dark-1"] = {probability = noise.var("lab-expr-1")},
                    ["lab-dark-2"] = {probability = noise.var("lab-expr-2")}
                }
            }
        }
    },
    advanced_settings = {pollution = {enabled = false}}
}