440 lines
14 KiB
Lua
440 lines
14 KiB
Lua
local water_level = tonumber(minetest.get_mapgen_setting("water_level"))
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--
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-- Functions/ABMs
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--
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-- Chest naming via signs
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function default.write_name(pos, text)
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-- Check above, if allowed
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if minetest.settings:get_bool("signs_allow_name_above") then
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local above = {x = pos.x, y = pos.y + 1, z = pos.z}
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local abovedef = nil
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if minetest.registered_nodes[minetest.get_node(above).name] then
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abovedef = minetest.registered_nodes[minetest.get_node(above).name]
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end
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if abovedef and abovedef.write_name ~= nil then
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abovedef.write_name(above, text)
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end
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end
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-- Then below
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local below = {x = pos.x, y = pos.y - 1, z = pos.z}
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local belowdef = nil
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if minetest.registered_nodes[minetest.get_node(below).name] then
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belowdef = minetest.registered_nodes[minetest.get_node(below).name]
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end
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if belowdef and belowdef.write_name ~= nil then
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belowdef.write_name(below, text)
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end
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end
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-- Saplings growing and placing
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function default.place_sapling(itemstack, placer, pointed_thing)
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-- Check growability
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local underdef = minetest.get_node(pointed_thing.under)
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if minetest.get_item_group(underdef.name, "soil") == 0 then
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return itemstack
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end
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minetest.set_node(pointed_thing.above, {name = itemstack:get_name()})
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if not minetest.settings:get_bool("creative_mode") then
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itemstack:take_item()
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end
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return itemstack
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end
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function default.begin_growing_sapling(pos)
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local node = minetest.get_node(pos)
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if node.name == "default:sapling" then
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minetest.get_node_timer(pos):start(math.random(300, 480))
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elseif node.name == "default:sapling_oak" then
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minetest.get_node_timer(pos):start(math.random(700, 960))
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elseif node.name == "default:sapling_birch" then
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minetest.get_node_timer(pos):start(math.random(480, 780))
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end
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end
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function default.grow_sapling(pos, variety)
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local function grow()
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if variety == "apple" then
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minetest.place_schematic(
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{
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x = pos.x - 2,
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y = pos.y - 1,
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z = pos.z - 2
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},
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minetest.get_modpath("default")
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.. "/schematics/default_appletree.mts", "0", {}, false)
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elseif variety == "oak" then
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minetest.place_schematic(
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{
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x = pos.x - 2,
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y = pos.y - 1,
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z = pos.z - 2
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},
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minetest.get_modpath("default")
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.. "/schematics/default_oaktree.mts", "0", {}, false)
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elseif variety == "birch" then
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minetest.place_schematic(
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{
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x = pos.x - 1,
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y = pos.y - 1,
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z = pos.z - 1
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},
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minetest.get_modpath("default")
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.. "/schematics/default_squaretree.mts", "0",
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{
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["default:leaves"] = "default:leaves_birch",
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["default:tree"] = "default:tree_birch",
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["default:apple"] = "air"
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}, false)
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end
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end
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minetest.remove_node(pos)
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minetest.after(0, grow)
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default.log("A " .. variety .. " tree sapling grows at " ..
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minetest.pos_to_string(pos), "info")
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end
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-- Make preexisting trees restart the growing process
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minetest.register_lbm(
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{
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label = "Grow legacy trees",
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name = "default:grow_legacy_trees",
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nodenames = {"default:sapling", "default:sapling_oak", "default:sapling_birch"},
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action = function(pos, node)
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default.begin_growing_sapling(pos)
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end
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}
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)
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-- Vertical plants
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function default.dig_up(pos, node, digger)
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local np = {x = pos.x, y = pos.y + 1, z = pos.z}
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local nn = minetest.get_node(np)
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if nn.name == node.name then
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if digger then
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minetest.node_dig(np, nn, digger)
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else
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minetest.remove_node(np)
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end
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end
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end
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function default.dig_down(pos, node, digger)
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local np = {x = pos.x, y = pos.y - 1, z = pos.z}
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local nn = minetest.get_node(np)
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if nn.name == node.name then
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minetest.node_dig(np, nn, digger)
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end
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end
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-- Leaf decay
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default.leafdecay_trunk_cache = {}
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default.leafdecay_enable_cache = true
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-- Spread the load of finding trunks
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default.leafdecay_trunk_find_allow_accumulator = 0
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minetest.register_globalstep(function(dtime)
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local finds_per_second = 5000
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default.leafdecay_trunk_find_allow_accumulator =
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math.floor(dtime * finds_per_second)
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end)
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default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
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local node = minetest.get_node(pos)
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node.param2 = 1
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minetest.set_node(pos, node)
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end
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minetest.register_abm( -- leaf decay
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{
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label = "Leaf decay",
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nodenames = {"group:leafdecay"},
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neighbors = {"air", "group:liquid"},
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-- A low interval and a high inverse chance spreads the load
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interval = 2,
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chance = 3,
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action = function(p0, node, _, _)
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local do_preserve = false
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local d = minetest.registered_nodes[node.name].groups.leafdecay
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if not d or d == 0 then
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return
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end
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local n0 = minetest.get_node(p0)
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if n0.param2 ~= 0 then
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return
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end
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local p0_hash = nil
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if default.leafdecay_enable_cache then
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p0_hash = minetest.hash_node_position(p0)
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local trunkp = default.leafdecay_trunk_cache[p0_hash]
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if trunkp then
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local n = minetest.get_node(trunkp)
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local reg = minetest.registered_nodes[n.name]
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-- Assume ignore is a trunk, to make the thing work at the border of the active area
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if n.name == "ignore" or (reg and reg.groups.tree and reg.groups.tree ~= 0) then
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return
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end
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-- Cache is invalid
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table.remove(default.leafdecay_trunk_cache, p0_hash)
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end
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end
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if default.leafdecay_trunk_find_allow_accumulator <= 0 then
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return
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end
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default.leafdecay_trunk_find_allow_accumulator =
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default.leafdecay_trunk_find_allow_accumulator - 1
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-- Assume ignore is a trunk, to make the thing work at the border of the active area
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local p1 = minetest.find_node_near(p0, d, {"ignore", "group:tree"})
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if p1 then
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do_preserve = true
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if default.leafdecay_enable_cache then
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-- Cache the trunk
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default.leafdecay_trunk_cache[p0_hash] = p1
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end
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end
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if not do_preserve then
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-- Drop stuff other than the node itself
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local itemstacks = minetest.get_node_drops(n0.name)
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for _, itemname in ipairs(itemstacks) do
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if minetest.get_item_group(n0.name, "leafdecay_drop") ~= 0 or itemname ~= n0.name then
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local p_drop = {
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x = p0.x - 0.5 + math.random(),
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y = p0.y - 0.5 + math.random(),
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z = p0.z - 0.5 + math.random(),
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}
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minetest.add_item(p_drop, itemname)
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end
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end
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-- Remove node
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minetest.remove_node(p0)
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end
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end
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})
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local is_dry_biome = function(biomename)
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return biomename == "Charparral" or biomename == "Savanna" or biomename == "Savanna Ocean" or biomename == "Desert" or biomename == "Wasteland"
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end
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minetest.register_abm( -- dirt and grass footsteps becomes dirt with grass if uncovered
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{
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label = "Grow grass on dirt",
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nodenames = {"default:dirt", "default:dirt_with_grass_footsteps", "default:swamp_dirt"},
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interval = 2,
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chance = 40,
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action = function(pos, node)
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local above = {x=pos.x, y=pos.y+1, z=pos.z}
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local name = minetest.get_node(above).name
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local partialblock = minetest.get_item_group(name, "path") ~= 0 or minetest.get_item_group(name, "slab") ~= 0 or minetest.get_item_group(name, "stair") ~= 0
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local nodedef = minetest.registered_nodes[name]
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if nodedef and (not partialblock) and (nodedef.sunlight_propagates or nodedef.paramtype == "light") and nodedef.liquidtype == "none" and (minetest.get_node_light(above) or 0) >= 8 then
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local biomedata = minetest.get_biome_data(pos)
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local biomename = minetest.get_biome_name(biomedata.biome)
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if node.name == "default:swamp_dirt" then
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if biomename == "Swamp" then
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minetest.set_node(pos, {name = "default:dirt_with_swamp_grass"})
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end
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else
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if is_dry_biome(biomename) then
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minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
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else
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minetest.set_node(pos, {name = "default:dirt_with_grass"})
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end
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end
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end
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end
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})
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minetest.register_abm( -- dirt with grass becomes dirt if covered
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{
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label = "Remove grass on covered dirt",
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nodenames = {"group:grass_cover"},
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interval = 2,
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chance = 10,
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action = function(pos, node)
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local above = {x=pos.x, y=pos.y+1, z=pos.z}
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local name = minetest.get_node(above).name
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local partialblock = minetest.get_item_group(name, "path") ~= 0 or minetest.get_item_group(name, "slab") ~= 0 or minetest.get_item_group(name, "stair") ~= 0
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local nodedef = minetest.registered_nodes[name]
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if nodedef and (name ~= "ignore" and (partialblock) or (not ((nodedef.sunlight_propagates or nodedef.paramtype == "light") and nodedef.liquidtype == "none"))) then
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if node.name == "default:dirt_with_swamp_grass" then
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minetest.set_node(pos, {name = "default:swamp_dirt"})
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else
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minetest.set_node(pos, {name = "default:dirt"})
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end
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end
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end
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})
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minetest.register_abm({
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label = "Grass expansion",
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nodenames = {"group:grass"},
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neighbors = {"group:grass_cover"},
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interval = 20,
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chance = 160,
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action = function(pos, node)
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pos.y = pos.y - 1
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local under = minetest.get_node(pos)
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pos.y = pos.y + 1
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local required_under
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if minetest.get_item_group(node.name, "normal_grass") ~= 0 then
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required_under = "default:dirt_with_grass"
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elseif minetest.get_item_group(node.name, "dry_grass") ~= 0 then
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required_under = "default:dirt_with_dry_grass"
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elseif minetest.get_item_group(node.name, "swamp_grass") ~= 0 then
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required_under = "default:dirt_with_swamp_grass"
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else
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return
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end
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if under.name ~= required_under then
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return
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end
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-- Lower chance to spread dry grass
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if node.name == "default:dry_grass" and math.random(1,2) == 1 then
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return
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end
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local pos0 = vector.subtract(pos, 4)
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local pos1 = vector.add(pos, 4)
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-- Testing shows that a threshold of 3 results in an appropriate maximum
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-- density of approximately 7 nodes per 9x9 area.
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if #minetest.find_nodes_in_area(pos0, pos1, {"group:grass", "default:fern"}) > 3 then
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return
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end
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local soils = minetest.find_nodes_in_area_under_air( pos0, pos1, "group:grass_cover")
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local num_soils = #soils
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if num_soils >= 1 then
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for si = 1, math.min(3, num_soils) do
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local soil = soils[math.random(num_soils)]
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local soil_above = {x = soil.x, y = soil.y + 1, z = soil.z}
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minetest.set_node(soil_above, {name = node.name})
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end
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end
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end
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})
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minetest.register_abm({
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label = "Growing clams",
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nodenames = {"default:sand", "default:gravel"},
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neighbors = {"default:water_source"},
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interval = 20,
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chance = 160,
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action = function(pos, node)
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if pos.y ~= water_level then
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return
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end
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local pos0 = vector.add(pos, {x=-5, y=0, z=-5})
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local pos1 = vector.add(pos, {x=5, y=2, z=5})
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if #minetest.find_nodes_in_area(pos0, pos1, "default:clam") >= 1 then
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return
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end
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pos0 = vector.add(pos, {x=-2, y=0, z=-2})
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pos1 = vector.add(pos, {x=2, y=0, z=2})
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local soils = minetest.find_nodes_in_area_under_air( pos0, pos1, {"default:sand", "default:gravel"})
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local num_soils = #soils
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if num_soils >= 1 then
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for si = 1, math.min(3, num_soils) do
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local soil = soils[math.random(num_soils)]
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local soil_above = {x = soil.x, y = soil.y + 1, z = soil.z}
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minetest.set_node(soil_above, {name = "default:clam"})
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end
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end
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end
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})
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minetest.register_abm( -- cactus grows
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{
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label = "Growing cacti",
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nodenames = {"default:cactus"},
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neighbors = {"group:sand"},
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interval = 20,
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chance = 10,
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action = function(pos, node)
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pos.y = pos.y-1
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local name = minetest.get_node(pos).name
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if minetest.get_item_group(name, "sand") ~= 0 then
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pos.y = pos.y+1
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local height = 0
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while minetest.get_node(pos).name == "default:cactus" and height < 3 do
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height = height+1
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pos.y = pos.y+1
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end
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if height < 3 then
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if minetest.get_node(pos).name == "air" then
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minetest.set_node(pos, {name="default:cactus"})
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end
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end
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end
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end,
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})
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minetest.register_abm( -- papyrus grows
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{
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label = "Growing papyrus",
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nodenames = {"default:papyrus"},
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neighbors = {"group:plantable_sandy", "group:plantable_soil"},
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interval = 20,
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chance = 10,
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action = function(pos, node)
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pos.y = pos.y-1
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local name = minetest.get_node(pos).name
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if minetest.find_node_near(pos, 3, {"group:water"}) == nil then
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return
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end
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pos.y = pos.y+1
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local height = 0
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while minetest.get_node(pos).name == "default:papyrus" and height < 3 do
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height = height+1
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pos.y = pos.y+1
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end
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if height < 3 then
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if minetest.get_node(pos).name == "air" then
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minetest.set_node(pos, {name="default:papyrus"})
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end
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end
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end,
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})
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minetest.register_abm( -- weak torchs burn out and die after ~3 minutes
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{
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label = "Burning out weak torches",
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nodenames = {"default:torch_weak", "default:torch_weak_wall"},
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interval = 3,
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chance = 60,
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action = function(pos, node)
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minetest.set_node(pos, {name = "default:torch_dead", param = node.param, param2 = node.param2})
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end
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})
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default.log("functions", "loaded")
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