forked from MineClone5/MineClone5
58 lines
1.9 KiB
Lua
58 lines
1.9 KiB
Lua
local nether_wart_chance
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if mcl_mapgen.v6 then
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nether_wart_chance = 85
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else
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nether_wart_chance = 170
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end
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local y_min = mcl_mapgen.nether.min
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local y_max = mcl_mapgen.nether.max
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local place_on = {"group:soil_nether_wart"}
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local block_size = mcl_mapgen.BS
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local decrease_search_area = math.min(2, math.floor(block_size/2))
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local search_area_size = math.max(block_size - 2 * decrease_search_area, math.max(1, math.ceil(nether_wart_chance^(1/3))))
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nether_wart_chance = math.floor(nether_wart_chance * (search_area_size^3) / (block_size^3))
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local nether_wart_chance_threshold = nether_wart_chance
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local minetest_swap_node = minetest.swap_node
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local wart_perlin
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local noise_params = {
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offset = 0.4,
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scale = 0.4,
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spread = {x = block_size, y = block_size, z = block_size},
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seed = 238742,
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octaves = 1,
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persist = 0.5,
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}
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minetest.log("action", "Nether Wart block_size=" .. block_size .. ", search_area_size=" .. search_area_size .. ", per-area nether_wart_chance=" .. nether_wart_chance)
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local minetest_find_nodes_in_area_under_air = minetest.find_nodes_in_area_under_air
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local minetest_get_perlin = minetest.get_perlin
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mcl_mapgen.register_mapgen_block(function(minp, maxp, seed)
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local minp = minp
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local y1 = minp.y
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if y1 > y_max then return end
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local maxp = maxp
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local y2 = maxp.y
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if y2 < y_min then return end
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local p1 = {x = minp.x + decrease_search_area, y = y1 + decrease_search_area, z = minp.z + decrease_search_area}
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local p2 = {x = maxp.x - decrease_search_area, y = y2 - decrease_search_area, z = maxp.z - decrease_search_area}
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local pos_list = minetest_find_nodes_in_area_under_air(p1, p2, place_on)
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local pr = PseudoRandom(seed)
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wart_perlin = wart_perlin or minetest_get_perlin(noise_params)
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for i = 1, #pos_list do
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local pos = pos_list[i]
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if pr:next(1, nether_wart_chance) + wart_perlin:get_3d(pos) >= nether_wart_chance_threshold then
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pos.y = pos.y + 1
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minetest.swap_node(pos, {name = "mcl_nether:nether_wart"})
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end
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end
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end, 999999999)
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