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Add kelp growth

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This commit is contained in:
Wuzzy 2019-12-18 15:06:35 +01:00
parent 286009cbd7
commit 85c058125c
1 changed files with 71 additions and 14 deletions
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85
mods/ITEMS/mcl_ocean/kelp.lua
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@ -9,6 +9,38 @@ local surfaces = {
{ "gravel", "mcl_core:gravel", 1 },
}
local function get_kelp_top(pos, node)
local size = math.ceil(node.param2 / 16)
local pos_water = table.copy(pos)
pos_water.y = pos_water.y + size
return pos_water, minetest.get_node(pos_water)
end
local function get_submerged(node_water)
local def_water = minetest.registered_nodes[node_water.name]
-- Submerged in water?
if minetest.get_item_group(node_water.name, "water") then
if def_water.liquidtype == "source" then
return "source"
elseif def_water.liquidtype == "flowing" then
return "flowing"
end
end
return false
end
local function grow_param2_step(param2, snap_into_grid)
local old_param2 = param2
param2 = param2 + 16
if param2 > 240 then
param2 = 240
end
if snap_into_grid and (param2 % 16 ~= 0) then
param2 = param2 - (param2 % 16)
end
return param2, param2 ~= old_param2
end
local function kelp_on_place(itemstack, placer, pointed_thing)
if pointed_thing.type ~= "node" or not placer then
return itemstack
@ -49,15 +81,14 @@ local function kelp_on_place(itemstack, placer, pointed_thing)
node_under.name = "mcl_ocean:kelp_gravel"
elseif minetest.get_item_group(node_under.name, "kelp") == 1 then
-- Place kelp on kelp = grow kelp by 1 node length
if node_under.param2 < 240 then
node_under.param2 = node_under.param2 + 16
grow_kelp = true
else
node_under.param2, grow_kelp = grow_param2_step(node_under.param2)
if not grow_kelp then
return itemstack
end
else
return itemstack
end
local submerged = false
if grow_kelp then
-- Kelp placed on kelp ...
-- Kelp can be placed on top of another kelp to make it grow
@ -65,18 +96,13 @@ local function kelp_on_place(itemstack, placer, pointed_thing)
-- Placed on side or below node, abort
return itemstack
end
-- New kelp top must also be submerged in water
local size = math.ceil(node_under.param2 / 16)
minetest.log("error", node_under.param2.."|"..size)
local pos_water = table.copy(pos_under)
pos_water.y = pos_water.y + size
local node_water = minetest.get_node(pos_water)
local def_water = minetest.registered_nodes[node_water.name]
if not (minetest.get_item_group(node_water.name, "water") and def_water.liquidtype == "source") then
-- Not submerged in water, abort
-- New kelp top must also be submerged in water source
local _, top_node = get_kelp_top(pos_under, node_under)
submerged = get_submerged(top_node)
if submerged ~= "source" then
-- Not submerged in water source, abort
return itemstack
end
else
-- New kelp placed ...
if pos_under.y >= pos_above.y then
@ -87,6 +113,7 @@ local function kelp_on_place(itemstack, placer, pointed_thing)
local g_above_water = minetest.get_item_group(node_above.name, "water")
if not (g_above_water ~= 0 and def_above.liquidtype == "source") then
return itemstack
-- TODO: Also allow placement into downwards flowing liquid
end
node_under.param2 = minetest.registered_items[node_under.name].place_param2 or 16
end
@ -235,3 +262,33 @@ minetest.register_craft({
recipe = "mcl_ocean:dried_kelp_block",
burntime = 200,
})
-- Grow kelp
minetest.register_abm({
label = "Kelp growth",
nodenames = { "group:kelp" },
interval = 45,
chance = 12,
catch_up = false,
action = function(pos, node, active_object_count, active_object_count_wider)
local grown
-- Grow kelp by 1 node length if it would grow inside water
node.param2, grown = grow_param2_step(node.param2, true)
local top, top_node = get_kelp_top(pos, node)
local submerged = get_submerged(top_node)
if grown then
if submerged == "source" then
-- Liquid source: Grow normally
minetest.set_node(pos, node)
elseif submerged == "flowing" then
-- Flowing liquid: Grow 1 step, but also turn the top node into a liquid source
minetest.set_node(pos, node)
local def_liq = minetest.registered_nodes[top_node.name]
local alt_liq = def_liq and def_liq.liquid_alternative_source
if alt_liq then
minetest.set_node(top, {name=alt_liq})
end
end
end
end,
})