sponge/init.lua
2020-12-22 01:12:06 +00:00

151 lines
5.2 KiB
Lua

--[[
- Sponge mod for Minetest
- water removal for survival
made by Benjie/Fiftysix - 27/8/18
updated 22/12/20
Soggy sponges can rarely be found deep in the sea where the darkness begins.
These can be cooked into dry sponges, and then placed near a liquid to remove an area of it
They will hold the water away until they are removed.
This will cause them to become soggy, so to use them again they have to be cooked.
Sponges create a 9x9 area of air-like nodes that water can't flow through (checks for protection)
If sponges have cleared more than 3 nodes of liquid, they become soggy sponges
removing a sponge or soggy sponge will turn a 9x9 area of air-like nodes back into air
(air-like nodes can be removed in protection by removing a sponge outside the protection, they are not meant to be permanent)
]]--
local area = 4 -- The "radius" (of the cube) to clear water
local keep_dry = 3 -- The maximum amount of water cleared where the sponge doesn't turn soggy
local modname = minetest.get_current_modname()
-- called by after_destruct()
local destruct = function(pos) -- removing the air-like nodes
-- find all sponges that intersect with this sponge's area
local sponge_info = minetest.find_nodes_in_area(
{x=pos.x-area*2, y=pos.y-area*2, z=pos.z-area*2}, {x=pos.x+area*2, y=pos.y+area*2, z=pos.z+area*2},
{modname..":soggy_sponge", modname..":sponge"}, true
)
local sponges = {}
for _, p in pairs(sponge_info) do
local node = minetest.get_node(p)
if node.param1 == 1 or node.name == modname..":sponge" then
table.insert(sponges, p)
end
end
for x = pos.x-area, pos.x+area do
for y = pos.y-area, pos.y+area do
for z = pos.z-area, pos.z+area do
local n = minetest.get_node({x=x, y=y, z=z}).name
if n == modname..":liquid_stop" then
-- check if position intersects with another sponge
local intersect = false
for _, s_pos in pairs(sponges) do
if math.abs(s_pos.x-x) <= area and math.abs(s_pos.y-y) <= area and math.abs(s_pos.z-z) <= area then
intersect = true
break
end
end
if not intersect then
minetest.remove_node({x=x, y=y, z=z})
end
end
end
end
end
end
-- called by after_place_node()
local construct = function(pos, placer, itemstack, pointed_thing)
local playername = placer:get_player_name()
if not minetest.is_protected(pos, playername) then
local count = 0
for x = pos.x-area, pos.x+area do
for y = pos.y-area, pos.y+area do
for z = pos.z-area, pos.z+area do
local n = minetest.get_node({x=x, y=y, z=z}).name
local def = minetest.registered_nodes[n]
if def ~= nil and (n == "air" or def["drawtype"] == "liquid" or def["drawtype"] == "flowingliquid") then
local p = {x=x, y=y, z=z}
if not minetest.is_protected(p, playername) then
if n ~= "air" then
count = count + 1 -- counting liquids
end
minetest.set_node(p, {name=modname..":liquid_stop"})
end
end
end
end
end
if count > keep_dry then -- turns soggy if it removed more than `keep_dry` nodes
minetest.swap_node(pos, {name=modname..":soggy_sponge", param1=1})
end
end
end
minetest.register_node(modname..":liquid_stop", { -- air-like node
description = "liquid blocker for sponges",
drawtype = "airlike",
drop = {max_items=0, items={}},
groups = {not_in_creative_inventory=1},
pointable = false,
walkable = false,
floodable = false,
sunlight_propagates = true,
paramtype = "light",
buildable_to = true,
})
minetest.register_node(modname..":sponge", { -- dry sponge
description = "Sponge",
tiles = {"sponge_sponge.png"},
groups = {crumbly=3},
sounds = default.node_sound_dirt_defaults(),
after_place_node = construct,
after_destruct = destruct,
})
minetest.register_node(modname..":soggy_sponge", { -- soggy sponge
description = "Soggy sponge",
tiles = {"sponge_soggy_sponge.png"},
groups = {crumbly=3},
sounds = default.node_sound_dirt_defaults(),
after_destruct = destruct,
})
minetest.register_craft({ -- cooking soggy sponge back into dry sponge
type = "cooking",
recipe = modname..":soggy_sponge",
output = modname..":sponge",
cooktime = 2,
})
minetest.register_decoration({ -- sponges are found deep in the sea
name = modname..":sponges",
deco_type = "simple",
place_on = {"default:sand"},
spawn_by = "default:water_source",
num_spawn_by = 3,
fill_ratio = 0.0003,
y_max = -12,
flags = "force_placement",
decoration = modname..":soggy_sponge",
})