89 lines
2.6 KiB
Lua
89 lines
2.6 KiB
Lua
local modname = minetest.get_current_modname()
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-- NODE NAMES
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local sapling = modname .. ":sapling"
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local log_alive = modname .. ":log_alive"
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local leaves_growing = modname .. ":leaves_growing"
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local function supports_sapling (name)
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if name == log_alive or name == root_alive then return true end
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return minetest.get_item_group(name, "dirty") > 0
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end
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-- this commented-out function will be used when roots start affecting tree growth.
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--[[
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local function find_first_root (pos, max_height = 8)
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local pos = vector.copy(pos)
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local height = 0
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while height < max_height do
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height = height + 1
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local nodename = minetest.get_node(pos).name
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if nodename == modname .. ":root_alive" then return pos end
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if not blockgame.item_matches(nodename, {
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modname .. ":sapling",
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modname .. ":log_alive",
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}) then return end
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pos = pos + blockgame.vector.dirs.down
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end
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end
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]]--
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blockgame.register_increasing_abm({
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id = modname .. ":grow_sapling",
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label = "grow sapling",
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nodenames = {sapling},
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neighbors = {"group:dirty", log_alive},
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interval = 15,
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chance = 4,
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rate = function (pos, node, data)
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-- TODO: find connected living logs and leaves, and nearby light levels, and soil richness near roots, to calculate growth rate.
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return data.value + math.random(1, 99)
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end,
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check = function (pos, node, data)
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if data.value < 200 then return false end
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local below = pos + blockgame.vector.dirs.down
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local below_name = minetest.get_node(below).name
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if not supports_sapling(below_name) then return false end
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local above = pos + blockgame.vector.dirs.up
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if minetest.get_node(above).name ~= "air" then return false end
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return true
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end,
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action = function (pos, node, data)
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-- TODO: decrease energy (`data.value`) when growing, but don't completely reset it to 0.
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-- (this will require the api adding support for increasing_abm actions modifying their data.)
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local above = pos + blockgame.vector.dirs.up
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-- grow up, with a chance to stop growing.
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if not blockgame.chance(4) then
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minetest.set_node(above, {name = sapling})
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end
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local below = pos + blockgame.vector.dirs.down
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-- if this tree have already grown at least once, create a log...
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if blockgame.item_matches(minetest.get_node(below).name, {
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modname .. ":root_alive",
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modname .. ":log_alive",
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}) then
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minetest.set_node(pos, {name = log_alive})
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else
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-- ... otherwise, create a root
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minetest.set_node(pos, {name = modname .. ":root_alive"})
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end
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-- grow out leaves to the sides.
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local sides = blockgame.vector.get_sides_of(pos)
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for _, side in pairs(sides) do
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blockgame.attempt_place(side, {name = leaves_growing})
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end
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end,
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})
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