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VoxeLibre/mods/ITEMS/mcl_ocean/kelp.lua

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-- TODO: whenever it becomes possible to fully implement kelp without the
-- plantlike_rooted limitation, please adapt the code accordingly.
--
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-- TODO: In MC, you can't actually destroy kelp by bucket'ing water in the middle.
-- However, because of the plantlike_rooted hack, we'll just allow it for now.
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local S = minetest.get_translator("mcl_ocean")
local mod_doc = minetest.get_modpath("doc") ~= nil
--------------------------------------------------------------------------------
-- local-ify runtime functions
--------------------------------------------------------------------------------
-- objects
local mt_registered_items = minetest.registered_items
local mt_registered_nodes = minetest.registered_nodes
-- functions
local mt_add_item = minetest.add_item
local mt_get_item_group = minetest.get_item_group
local mt_get_node = minetest.get_node
local mt_get_node_level = minetest.get_node_level
local mt_get_node_max_level = minetest.get_node_max_level
local mt_get_node_or_nil = minetest.get_node_or_nil
local mt_get_node_timer = minetest.get_node_timer
local mt_hash_node_position = minetest.hash_node_position
local mt_is_protected = minetest.is_protected
local mt_set_node = minetest.set_node
local mt_get_meta = minetest.get_meta
local mt_is_creative_enabled = minetest.is_creative_enabled
local mt_sound_play = minetest.sound_play
local math_floor = math.floor
local math_random = math.random
local string_format = string.format
-- DEBUG: functions
local log = minetest.log
local chatlog = minetest.chat_send_all
--------------------------------------------------------------------------------
-- Kelp API
--------------------------------------------------------------------------------
local kelp = {}
mcl_ocean.kelp = kelp
kelp.MAX_AGE = 25
kelp.TIMER_INTERVAL = 0.2
-- The average amount of growth for kelp in a day is 2.16 (https://youtu.be/5Bp4lAjAk3I)
-- Normally, a day lasts 20 minutes, meaning this nodetimer is executed 24000 times.
-- Calculate probability via 2.16/24000 and we get the probability 9/100'000 or 9.0e-5
-- NOTE: currently, we can't exactly use the same type of randomness MC does,
-- because it has multiple complicated sets of PRNGs.
-- kelp.RANDOM_NUMERATOR = 9
kelp.RANDOM_NUMERATOR = 100
kelp.RANDOM_DENOMINATOR = 100000
kelp.leaf_sounds = mcl_sounds.node_sound_leaves_defaults()
-- TODO: is this really necessary
-- Lock drops to avoid duplicate drops, set after dropping detached kelp.
kelp.lock_drop = 0
-- Registrar of nodetimers, indexed by pos_hash.
kelp.registered_nodetimers = {}
-- Pool storing age, indexed by pos_hash.
kelp.age_pool = {}
-- is age in the growable range?
function kelp.is_age_growable(age)
return age >= 0 and age < kelp.MAX_AGE
end
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-- Is this water?
-- Returns the liquidtype, if indeed water.
function kelp.is_submerged(node, def)
if mt_get_item_group(node.name, "water") ~= 0 then
return def.liquidtype -- Expected only "source" and "flowing" from water liquids
end
return false
end
-- Is the water downward flowing?
-- (kelp can grow/be placed inside downward flowing water)
function kelp.is_downward_flowing(pos, node, def, is_above)
local result = (math_floor(node.param2 / 8) % 2) == 1
if not (result or is_above) then
-- If not, also check node above.
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-- (this is needed due a weird quirk in the definition of "downwards flowing"
-- liquids in Minetest)
local node_above = mt_get_node({x=pos.x,y=pos.y+1,z=pos.z})
local def_above = mt_registered_nodes[node_above.name]
result = kelp.is_submerged(node_above, def_above)
or kelp.is_downward_flowing(pos, node_above, def_above, true)
end
return result
end
-- Will node fall at that position?
-- This only checks if a node would fall, meaning that node need not be at pos.
function kelp.is_falling(pos, node)
-- NOTE: Modified from check_single_for_falling in builtin.
-- Please update as necessary.
local nodename = node.name
if mt_get_item_group(nodename, "falling_node") == 0 then
return false
end
local pos_bottom = {x = pos.x, y = pos.y - 1, z = pos.z}
-- get_node_or_nil: Only fall if node below is loaded
local node_bottom = mt_get_node_or_nil(pos_bottom)
local nodename_bottom = node_bottom.name
local def_bottom = node_bottom and mt_registered_nodes[nodename_bottom]
if not def_bottom then
return false
end
local same = nodename == nodename_bottom
-- Let leveled nodes fall if it can merge with the bottom node
if same and def_bottom.paramtype2 == "leveled" and
mt_get_node_level(pos_bottom) <
mt_get_node_max_level(pos_bottom) then
return true
end
-- Otherwise only if the bottom node is considered "fall through"
if not same and
(not def_bottom.walkable or def_bottom.buildable_to) and
(mt_get_item_group(nodename, "float") == 0 or
def_bottom.liquidtype == "none") then
return true
end
return false
end
-- Converts param2 to kelp height.
function kelp.get_height(param2)
return math_floor(param2 / 16)
end
-- Obtain pos and node of the tip of kelp.
function kelp.get_tip(pos, node)
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local size = math.ceil(node.param2 / 16)
local pos_tip = table.copy(pos)
pos_tip.y = pos_tip.y + size
return pos_tip, mt_get_node(pos_tip)
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end
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-- Obtain position of the first kelp unsubmerged.
function kelp.find_unsubmerged(pos, node)
local x,y,z = pos.x, pos.y, pos.z
local height = kelp.get_height(node.param2)
local walk_pos = {x=x, z=z}
for i=1,height do
walk_pos.y = y + i
local walk_node = mt_get_node(walk_pos)
if mt_get_item_group(walk_node.name, "water") == 0 then
return walk_pos, walk_node
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end
end
return nil
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end
-- Obtain next param2.
function kelp.next_param2(param2)
return param2+16 - param2 % 16
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end
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-- Grow next kelp.
function kelp.next_grow(pos, node, pos_tip, def_tip, downward_flowing)
-- Optional parameters
local pos_tip, def_tip = pos_tip, def_tip
local downward_flowing = downward_flowing
if pos_tip == nil and def_tip == nil then
local node_tip
pos_tip, node_tip = kelp.get_tip(pos, node)
def_tip = mt_registered_nodes[node_tip.name]
downward_flowing = kelp.is_submerged(pos_tip, node_tip)
and kelp.is_downward_flowing(pos_tip, node_tip, def_tip)
end
-- Liquid source: Grow normally.
local node = table.copy(node)
node.param2 = kelp.next_param2(node.param2)
mt_set_node(pos, node)
-- Flowing liquid: Grow 1 step, but also turn the tip node into a liquid source.
if downward_flowing then
local alt_liq = def_tip.liquid_alternative_source
if alt_liq then
mt_set_node(pos_tip, {name=alt_liq})
end
end
end
-- Naturally grow next kelp.
function kelp.natural_grow(pos, node, age, pos_hash, meta)
-- Must grow first, then get the new meta
kelp.next_grow(pos, node)
-- Optional params
local meta = meta or mt_get_meta(pos)
local pos_hash = pos_hash or mt_hash_node_position(pos)
local age = age + 1
kelp.age_pool[pos_hash] = age
meta:set_int("mcl_ocean:kelp_age", age)
end
-- Drops the items for detached kelps.
function kelp.detach_drop(pos, height, pos_hash)
local pos_hash = pos_hash or mt_hash_node_position(pos) -- Optional params
if kelp.lock_drop > 0 then
minetest.log("error",
string_format("Duplicate drop prevented at (%d, %d, %d) with lock level %d! Please report this.",
pos.x, pos.y, pos.z, kelp.lock_drop))
return
end
local x,y,z = pos.x,pos.y,pos.z
for i=1,height do
mt_add_item({x=x, y=y+i, z=z}, "mcl_ocean:kelp")
end
-- Locks drop.
kelp.lock_drop = kelp.lock_drop + 1
return true
end
-- Detach the kelp at dig_pos, and drop their items.
-- Synonymous to digging the kelp.
-- NOTE: this is intended for whenever kelp truly becomes segmented plants
-- instead of rooted to the floor. Don't try to remove dig_pos.
function kelp.detach_dig(dig_pos, pos, node, is_drop, pos_hash)
local pos_hash = pos_hash or mt_hash_node_position(pos)
local param2 = node.param2
-- pos.y points to the surface, offset needed to point to the first kelp.
local new_height = dig_pos.y - (pos.y+1)
-- Digs the entire kelp: invoke after_dig_node to mt_set_node.
if new_height <= 0 then
if is_drop then
kelp.detach_drop(dig_pos, kelp.get_height(param2), pos_hash)
end
mt_set_node(pos, {
name=mt_registered_nodes[node.name].node_dig_prediction,
param=node.param, param2=0 })
-- Digs the kelp beginning at a height
else
if is_drop then
kelp.detach_drop(dig_pos, kelp.get_height(param2) - new_height, pos_hash)
end
mt_set_node(pos, {name=node.name, param=node.param, param2=16*new_height})
end
end
--------------------------------------------------------------------------------
-- Kelp callback functions
--------------------------------------------------------------------------------
-- Set this to drop kelps when
function kelp.surface_on_dig(pos, node, digger)
kelp.detach_dig(pos, pos, node, true)
end
function kelp.surface_after_dig_node(pos, node)
return mt_set_node(pos, {name=registred_nodes[node.name].node_dig_prediction})
end
function kelp.surface_on_timer(pos, elapsed)
local node = mt_get_node(pos)
local dig_pos = kelp.find_unsubmerged(pos, node)
local pos_hash = mt_hash_node_position(pos)
if dig_pos then
kelp.detach_dig(dig_pos, pos, node, true, pos_hash)
end
-- Grow kelp on chance
if math_random(kelp.RANDOM_DENOMINATOR) - kelp.RANDOM_NUMERATOR < 0 then
local age = kelp.age_pool[pos_hash]
if kelp.is_age_growable(age) then
kelp.natural_grow(pos, node, age, pos_hash)
end
end
return true
end
function kelp.surface_on_destruct(pos)
local node = mt_get_node(pos)
local pos_hash = mt_hash_node_position(pos)
-- on_falling callback. Activated by pistons for falling nodes too.
if kelp.is_falling(pos, node) then
kelp.detach_drop(pos, kelp.get_height(node.param2), pos_hash)
end
-- Unlocks drops.
if kelp.lock_drop > 0 then
kelp.lock_drop = kelp.lock_drop - 1
end
end
function kelp.surface_on_mvps_move(pos, node, oldpos, nodemeta)
-- Pistons moving falling nodes will have already activated on_falling callback.
kelp.detach_dig(pos, pos, node, mt_get_item_group(node.name, "falling_node") ~= 1)
end
-- NOTE: Uncomment this to use ABMs
-- local function surface_unsubmerged_abm(pos, node)
-- local dig_pos = find_unsubmerged(pos, node)
-- if dig_pos then
-- detach_dig(dig_pos, pos, node, true)
-- end
-- return true
-- end
-- NOTE: Uncomment this to use nodetimers
function kelp.surface_register_nodetimer(pos, node, pos_hash, meta, age)
-- Optional params
local pos_hash,meta,age = pos_hash,meta,age
local timer = kelp.registered_nodetimers[pos_hash]
if not timer then
pos_hash = pos_hash or mt_hash_node_position(pos)
timer = mt_get_node_timer(pos)
kelp.registered_nodetimers[pos_hash] = timer
-- Pool age to avoid meta:get* operations
meta = meta or mt_get_meta(pos)
if not age then
if not meta:contains("mcl_ocean:kelp_age") then
age = math_random(0, kelp.MAX_AGE-1)
else
age = meta:get_int("mcl_ocean:kelp_age")
end
end
kelp.age_pool[pos_hash] = age
meta:set_int("mcl_ocean:kelp_age", age)
end
if not timer:is_started() then
timer:start(kelp.TIMER_INTERVAL)
end
return pos_hash, meta, age
end
-- NOTE: Uncomment this to use ABMs
-- function kelp.grow_abm(pos, node)
-- -- Grow kelp by 1 node length if it would grow inside water
-- node.param2 = next_param2(node.param2)
-- local pos_tip, node_tip = get_tip(pos, node)
-- local def_tip = mt_registered_nodes[node_tip.name]
-- if is_submerged(node_tip, def_tip) then
-- kelp.next_grow(pos, node, pos_tip, def_tip,
-- is_downward_flowing(pos_tip, node_tip, def_tip))
-- end
-- end
function kelp.kelp_on_place(itemstack, placer, pointed_thing)
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if pointed_thing.type ~= "node" or not placer then
return itemstack
end
local player_name = placer:get_player_name()
local pos_under = pointed_thing.under
local pos_above = pointed_thing.above
local node_under = mt_get_node(pos_under)
local nu_name = node_under.name
local def_under = mt_registered_nodes[nu_name]
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-- Allow rightclick to override place.
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if def_under and def_under.on_rightclick and not placer:get_player_control().sneak then
return def_under.on_rightclick(pos_under, node_under,
placer, itemstack, pointed_thing) or itemstack
end
-- Protection
if mt_is_protected(pos_under, player_name) or
mt_is_protected(pos_above, player_name) then
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minetest.log("action", player_name
.. " tried to place " .. itemstack:get_name()
.. " at protected position "
.. minetest.pos_to_string(pos_under))
minetest.record_protection_violation(pos_under, player_name)
return itemstack
end
local pos_tip, node_tip, def_tip
local pos_hash, meta
-- Kelp must also be placed on the top/tip side of the surface/kelp
if pos_under.y >= pos_above.y then
return itemstack
end
-- When placed on kelp.
if mt_get_item_group(nu_name, "kelp") == 1 then
pos_tip, node_tip = kelp.get_tip(pos_under, node_under)
def_tip = mt_registered_nodes[node_tip.name]
pos_hash = mt_hash_node_position(pos_under)
meta = mt_get_meta(pos_under)
-- When placed on surface.
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else
local new_kelp = false
for _,surface in pairs(kelp.surfaces) do
if nu_name == surface.nodename then
node_under.name = "mcl_ocean:kelp_" ..surface.name
node_under.param2 = 0
new_kelp = true
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break
end
end
-- Surface must support kelp
if not new_kelp then
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return itemstack
end
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-- NOTE: Uncomment this to use nodetimers
-- Register nodetimer
pos_hash, meta = kelp.surface_register_nodetimer(pos_under)
pos_tip = pos_above
node_tip = mt_get_node(pos_above)
def_tip = mt_registered_nodes[node_tip.name]
end
-- New kelp must also be submerged in water.
local downward_flowing = kelp.is_downward_flowing(pos_tip, node_tip, def_tip)
if not (kelp.is_submerged(node_tip, def_tip) or downward_flowing) then
return itemstack
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end
-- Play sound, place surface/kelp and take away an item
local def_node = mt_registered_items[nu_name]
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if def_node.sounds then
mt_sound_play(def_node.sounds.place, { gain = 0.5, pos = pos_under }, true)
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end
kelp.next_grow(pos_under, node_under, pos_tip, def_tip, downward_flowing)
if not mt_is_creative_enabled(player_name) then
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itemstack:take_item()
end
-- Reroll age
local age = math_random(0, kelp.MAX_AGE-1)
meta:set_int("mcl_ocean:kelp_age", age)
kelp.age_pool[pos_hash] = age
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return itemstack
end
--------------------------------------------------------------------------------
-- Kelp registration API
--------------------------------------------------------------------------------
-- List of supported surfaces for seagrass and kelp.
kelp.surfaces = {
{ name="dirt", nodename="mcl_core:dirt", },
{ name="sand", nodename="mcl_core:sand", },
{ name="redsand", nodename="mcl_core:redsand", },
{ name="gravel", nodename="mcl_core:gravel", },
}
kelp.registered_surfaces = {}
-- Commented properties are the ones obtained using register_kelp_surface.
-- If you define your own properties, it overrides the default ones.
kelp.surface_deftemplate = {
drawtype = "plantlike_rooted",
paramtype = "light",
paramtype2 = "leveled",
place_param2 = 16,
--tiles = def.tiles,
special_tiles = {
{
image = "mcl_ocean_kelp_plant.png",
animation = {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0},
tileable_vertical = true,
}
},
--inventory_image = "("..def.tiles[1]..")^mcl_ocean_kelp_item.png",
wield_image = "mcl_ocean_kelp_item.png",
selection_box = {
type = "fixed",
fixed = {
{ -0.5, -0.5, -0.5, 0.5, 0.5, 0.5 },
{ -0.5, 0.5, -0.5, 0.5, 1.5, 0.5 },
},
},
-- groups.falling_node = is_falling,
groups = { dig_immediate = 3, deco_block = 1, plant = 1, kelp = 1, },
--sounds = sounds,
--node_dig_prediction = nodename,
after_dig_node = kelp.surface_after_dig_node,
on_destruct = kelp.surface_on_destruct,
on_dig = kelp.surface_on_dig,
on_timer = kelp.surface_on_timer,
mesecon = { on_mvps_move = kelp.surface_on_mvps_move, },
drop = "", -- drops are handled in on_dig
--_mcl_falling_node_alternative = is_falling and nodename or nil,
_mcl_hardness = 0,
_mcl_blast_resistance = 0,
}
-- Commented properties are the ones obtained using register_kelp_surface.
kelp.surface_docs = {
-- entry_id_orig = nodename,
_doc_items_entry_name = S("Kelp"),
_doc_items_longdesc = S("Kelp grows inside water on top of dirt, sand or gravel."),
--_doc_items_create_entry = doc_create,
_doc_items_image = "mcl_ocean_kelp_item.png",
}
-- Creates new surfaces.
-- NOTE: surface_deftemplate will be modified in-place.
function kelp.register_kelp_surface(surface, surface_deftemplate, surface_docs)
local name = surface.name
local nodename = surface.nodename
local def = mt_registered_nodes[nodename]
local def_tiles = def.tiles
local surfacename = "mcl_ocean:kelp_"..name
local surface_deftemplate = surface_deftemplate or kelp.surface_deftemplate -- Optional param
local doc_create = surface.doc_create or false
local surface_docs = surface_docs or kelp.surface_docs -- Optional param
if doc_create then
surface_deftemplate._doc_items_entry_name = surface_docs._doc_items_entry_name
surface_deftemplate._doc_items_longdesc = surface_docs._doc_items_longdesc
surface_deftemplate._doc_items_create_entry = true
surface_deftemplate._doc_items_image = surface_docs._doc_items_image
-- Sets the first surface as the docs' entry ID
if not surface_docs.entry_id_orig then
surface_docs.entry_id_orig = nodename
end
elseif mod_doc then
doc.add_entry_alias("nodes", surface_docs.entry_id_orig, "nodes", surfacename)
end
local sounds = table.copy(def.sounds)
sounds.dig = kelp.leaf_sounds.dig
sounds.dug = kelp.leaf_sounds.dug
sounds.place = kelp.leaf_sounds.place
surface_deftemplate.tiles = surface_deftemplate.tiles or def_tiles
surface_deftemplate.inventory_image = surface_deftemplate.inventory_image or "("..def_tiles[1]..")^mcl_ocean_kelp_item.png"
surface_deftemplate.sounds = surface_deftemplate.sound or sounds
local falling_node = mt_get_item_group(nodename, "falling_node")
surface_deftemplate.node_dig_prediction = surface_deftemplate.node_dig_prediction or nodename
surface_deftemplate.groups.falling_node = surface_deftemplate.groups.falling_node or falling_node
surface_deftemplate._mcl_falling_node_alternative = surface_deftemplate._mcl_falling_node_alternative or (falling_node and nodename or nil)
minetest.register_node(surfacename, surface_deftemplate)
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end
-- Kelp surfaces nodes ---------------------------------------------------------
-- Dirt must be registered first, for the docs
kelp.register_kelp_surface(kelp.surfaces[1], table.copy(kelp.surface_deftemplate), kelp.surface_docs)
for i=2, #kelp.surfaces do
kelp.register_kelp_surface(kelp.surfaces[i], table.copy(kelp.surface_deftemplate), kelp.surface_docs)
end
-- Kelp item -------------------------------------------------------------------
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minetest.register_craftitem("mcl_ocean:kelp", {
description = S("Kelp"),
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_tt_help = S("Grows in water on dirt, sand, gravel"),
_doc_items_create_entry = false,
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inventory_image = "mcl_ocean_kelp_item.png",
wield_image = "mcl_ocean_kelp_item.png",
on_place = kelp.kelp_on_place,
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groups = { deco_block = 1 },
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})
if mod_doc then
doc.add_entry_alias("nodes", kelp.surface_docs.entry_id_orig, "craftitems", "mcl_ocean:kelp")
end
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-- Dried kelp ------------------------------------------------------------------
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-- TODO: This is supposed to be eaten very fast
minetest.register_craftitem("mcl_ocean:dried_kelp", {
description = S("Dried Kelp"),
_doc_items_longdesc = S("Dried kelp is a food item."),
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inventory_image = "mcl_ocean_dried_kelp.png",
wield_image = "mcl_ocean_dried_kelp.png",
groups = { food = 2, eatable = 1 },
on_place = minetest.item_eat(1),
on_secondary_use = minetest.item_eat(1),
groups = { food = 2, eatable = 1 },
_mcl_saturation = 0.6,
})
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local mod_screwdriver = minetest.get_modpath("screwdriver") ~= nil
local on_rotate
if mod_screwdriver then
on_rotate = screwdriver.rotate_3way
end
minetest.register_node("mcl_ocean:dried_kelp_block", {
description = S("Dried Kelp Block"),
_doc_items_longdesc = S("A decorative block that serves as a great furnace fuel."),
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tiles = { "mcl_ocean_dried_kelp_top.png", "mcl_ocean_dried_kelp_bottom.png", "mcl_ocean_dried_kelp_side.png" },
groups = { handy = 1, building_block = 1, flammable = 2, fire_encouragement = 30, fire_flammability = 60 },
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sounds = mcl_sounds.node_sound_leaves_defaults(),
paramtype2 = "facedir",
on_place = mcl_util.rotate_axis,
on_rotate = on_rotate,
_mcl_hardness = 0.5,
_mcl_blast_resistance = 12.5,
})
minetest.register_craft({
type = "cooking",
recipe = "mcl_ocean:kelp",
output = "mcl_ocean:dried_kelp",
cooktime = 10,
})
minetest.register_craft({
recipe = {
{ "mcl_ocean:dried_kelp","mcl_ocean:dried_kelp","mcl_ocean:dried_kelp" },
{ "mcl_ocean:dried_kelp","mcl_ocean:dried_kelp","mcl_ocean:dried_kelp" },
{ "mcl_ocean:dried_kelp","mcl_ocean:dried_kelp","mcl_ocean:dried_kelp" },
},
output = "mcl_ocean:dried_kelp_block",
})
minetest.register_craft({
recipe = {
{ "mcl_ocean:dried_kelp_block" },
},
output = "mcl_ocean:dried_kelp 9",
})
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minetest.register_craft({
type = "fuel",
recipe = "mcl_ocean:dried_kelp_block",
burntime = 200,
})
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-- ABMs ------------------------------------------------------------------------
-- NOTE: Uncomment this to use nodetimers
minetest.register_lbm({
label = "Kelp timer registration",
name = "mcl_ocean:kelp_timer_registration",
nodenames = { "group:kelp" },
run_at_every_load = true, -- so old kelps are also registered
action = kelp.surface_register_nodetimer,
})
-- NOTE: Uncomment this to use ABMs
-- minetest.register_abm({
-- label = "Kelp drops",
-- nodenames = { "group:kelp" },
-- interval = 1.0,
-- chance = 1,
-- catch_up = false,
-- action = surface_unsubmerged_abm,
-- })
--
-- minetest.register_abm({
-- label = "Kelp growth",
-- nodenames = { "group:kelp" },
-- interval = 45,
-- chance = 12,
-- catch_up = false,
-- action = grow_abm,
-- })