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53 lines
1.5 KiB
Lua
53 lines
1.5 KiB
Lua
require "map_gen.shared.perlin_noise"
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-- list of {x, y, ore_type, size, richness, rng_seed}
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local ctrs = {
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{1, -15, "iron-ore", 0.3, 400, 113},
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{15, 15, "copper-ore", 0.3, 400, 80},
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{4, 21, "coal", 0.25, 640, 31},
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{10, 0, "stone", 0.5, 100, 17},
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{-17, 7, "uranium-ore", 0.6, 100, 203}
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}
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local function harmonic(x, y)
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local max_idx = 0
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local max = -1
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local richness = 0
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for i, e in ipairs(ctrs) do
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local noise = perlin:noise(x/32, y/32, ctrs[i][6])
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local h_coeff = 1/(1 + .05*math.sqrt((x/32 - ctrs[i][1])*(x/32 - ctrs[i][1]) + (y/32 - ctrs[i][2])*(y/32 - ctrs[i][2])))
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if noise > max and noise > h_coeff*ctrs[i][4] + (1-h_coeff) then
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max = noise
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max_idx = i
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richness = (40*(1-h_coeff) + 0.5*h_coeff) * ctrs[i][5]
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end
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end
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return max, max_idx, richness
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end
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--generate ores for entire chunk
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function run_ores_module(event)
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local area = event.area
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local surface = event.surface
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if math.abs(area.left_top.x / 32) < 3 and math.abs(area.left_top.y / 32) < 3 then
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return
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end
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local entities = surface.find_entities_filtered{type="resource", area=area}
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for _, entity in ipairs(entities) do
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entity.destroy()
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end
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local eties = {}
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for i = 0,31 do
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for j = 0,31 do
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local pos = {area.left_top.x + i, area.left_top.y + j}
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local max, max_idx, richness = harmonic(pos[1], pos[2])
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if -1 ~= max then
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local ety = {name = ctrs[max_idx][3], position = pos, force="neutral", amount=richness}
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if surface.can_place_entity(ety) then
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surface.create_entity(ety)
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end
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end
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end
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end
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end
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