62 lines
1.9 KiB
Lua
62 lines
1.9 KiB
Lua
--[[
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# Lightning Effect
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Use this effect to cause lightning strikes.
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Requires lightning mod in order to function. Uses default lightning configuration.
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Expects an integer indicating a chance (between 0 and 1) for lightning to strike (per cycle and player).
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]]
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if not minetest.get_modpath("lightning") then return end
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if regional_weather.settings.lightning == 0 then return end
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local EFFECT_NAME = "regional_weather:lightning"
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lightning.auto = false
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local rng = PcgRandom(82492402425)
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-- simplified position chooser by Auke Kok (sofar) taken from lightning mod itself
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-- see https://github.com/minetest-mods/lightning/blob/master/init.lua#L53-L91
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-- "lightning" is licensed under GNU Lesser Public License 2.1 or any later revision
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local function choose_pos(pos)
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pos.x = math.floor(pos.x - (lightning.range_h / 2) + rng:next(1, lightning.range_h))
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pos.y = pos.y + (lightning.range_v / 2)
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pos.z = math.floor(pos.z - (lightning.range_h / 2) + rng:next(1, lightning.range_h))
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local b, pos2 = minetest.line_of_sight(pos, {x = pos.x, y = pos.y - lightning.range_v, z = pos.z}, 1)
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-- nothing but air found
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if b then
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return nil
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end
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local n = minetest.get_node({x = pos2.x, y = pos2.y - 1/2, z = pos2.z})
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if n.name == "air" or n.name == "ignore" then
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return nil
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end
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return pos2
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end
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local function handle_effect(player_data)
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for playername, data in pairs(player_data) do
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local chance = 0
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for weather, value in pairs(data) do
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if type(value) ~= "number" then
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value = 1/20
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end
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chance = chance + value - (chance * value)
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end
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local random = math.random()
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if random <= chance * regional_weather.settings.lightning then
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local player = minetest.get_player_by_name(playername)
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local ppos = player:get_pos()
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local position = choose_pos(ppos)
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if position ~= nil then
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lightning.strike(position)
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end
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end
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end
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end
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climate_api.register_effect(EFFECT_NAME, handle_effect, "tick")
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climate_api.set_effect_cycle(EFFECT_NAME, climate_api.LONG_CYCLE) |