dfcaverns/big_webs/init.lua

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local modname = minetest.get_current_modname()
local S = minetest.get_translator(modname)
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local sound
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if minetest.get_modpath("df_dependencies") then
sound = df_dependencies.sound_leaves()
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end
local get_node_box = function(connector_thickness)
return {
type = "connected",
--fixed = {-hub_thickness,-hub_thickness,-hub_thickness,hub_thickness,hub_thickness,hub_thickness},
connect_top = {-connector_thickness, 0, -connector_thickness, connector_thickness, 0.5, connector_thickness},
connect_bottom = {-connector_thickness, -0.5, -connector_thickness, connector_thickness, 0, connector_thickness},
connect_back = {-connector_thickness, -connector_thickness, 0, connector_thickness, connector_thickness, 0.5},
connect_right = {0, -connector_thickness, -connector_thickness, 0.5, connector_thickness, connector_thickness},
connect_front = {-connector_thickness, -connector_thickness, -0.5, connector_thickness, connector_thickness, 0},
connect_left = {-0.5, -connector_thickness, -connector_thickness, 0, connector_thickness, connector_thickness},
disconnected = {-connector_thickness, -connector_thickness, -connector_thickness, connector_thickness, connector_thickness, connector_thickness},
}
end
local in_anchor_group = function(name)
return
minetest.get_item_group(name, "soil") > 0 or
minetest.get_item_group(name, "stone") > 0 or
minetest.get_item_group(name, "tree") > 0 or
minetest.get_item_group(name, "leaves") > 0 or
minetest.get_item_group(name, "sand") > 0 or
minetest.get_item_group(name, "wood") > 0 or
name == "ignore"
end
local cardinal_directions = {
{x=1,y=0,z=0},
{x=-1,y=0,z=0},
{x=0,y=1,z=0},
{x=0,y=-1,z=0},
{x=0,y=0,z=1},
{x=0,y=0,z=-1}
}
local cardinal_planes = {
{3,5},
{3,5},
{1,5},
{1,5},
{1,3},
{1,3},
}
local insert_if_not_in_hashtable = function(pos, insert_into, if_not_in)
local hash = minetest.hash_node_position(pos)
if if_not_in[hash] then
return
end
table.insert(insert_into, pos)
end
-- flood fill through the web to get all web and anchor locations
local get_web_nodes = function(pos, webs, anchors)
local to_check = {}
table.insert(to_check, pos)
while next(to_check) ~= nil do
local check_pos = table.remove(to_check)
local check_node = minetest.get_node(check_pos)
if minetest.get_item_group(check_node.name, "webbing") > 0 then
webs[minetest.hash_node_position(check_pos)] = true
for _, dir in pairs(cardinal_directions) do
insert_if_not_in_hashtable(vector.add(check_pos, dir), to_check, webs)
end
elseif in_anchor_group(check_node.name) then
anchors[minetest.hash_node_position(check_pos)] = true
end
end
end
local web_line = function(pos, dir, distance)
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local anchored
local web_spine = {}
for i = 0, distance do
local web_pos = vector.add(pos, vector.multiply(dir,i))
local node_name = minetest.get_node(web_pos).name
if node_name == "air" or node_name == "big_webs:webbing" then
table.insert(web_spine, web_pos)
elseif in_anchor_group(node_name) then
anchored=true
break
else
anchored=false
break
end
end
if anchored then
for _, web_pos in pairs(web_spine) do
if math.random() < 0.9 then
minetest.set_node(web_pos, {name="big_webs:webbing"})
end
end
return web_spine
end
return nil
end
local generate_web = function(pos)
local dir_choice = math.random(1, 6)
local dir = cardinal_directions[dir_choice]
local web_spine = web_line(pos, dir, 30)
if web_spine then
local dir2 = cardinal_directions[cardinal_planes[dir_choice][math.random(1, 2)]]
local dir2_opposite = vector.multiply(dir2, -1)
for _, web_pos in pairs(web_spine) do
web_line(web_pos, dir2, 15)
web_line(web_pos, dir2_opposite, 15)
end
end
end
minetest.register_node("big_webs:webbing", {
description = S("Giant Cave Spider Webbing"),
_doc_items_longdesc = S("Thick ropes of sticky, springy silk, strung between cavern walls in hopes of catching bats and even larger beasts."),
_doc_items_usagehelp = S("Webbing can be collected and re-strung elsewhere to aid in climbing. It absorbs all falling damage when you land on it."),
tiles = {
{name="big_webs.png"},
},
use_texture_alpha = "blend",
connects_to = {"group:soil", "group:stone", "group:tree", "group:leaves", "group:sand", "group:wood", "group:webbing"},
connect_sides = { "top", "bottom", "front", "left", "back", "right" },
drawtype = "nodebox",
node_box = get_node_box(0.0625),
collision_box = get_node_box(0.0625),
inventory_image = "big_webs_item.png",
wield_image = "big_webs_item.png",
paramtype = "light",
is_ground_content = false,
climbable = true,
floodable = true,
groups = {snappy = 2, choppy = 2, webbing = 1, flammable=1, fall_damage_add_percent=-100, bouncy=20},
sounds = sound,
on_construct = function(pos)
minetest.get_node_timer(pos):start(30)
end,
on_destruct = function(pos)
for _, dir in pairs(cardinal_directions) do
local neighbor_pos = vector.add(pos, dir)
if minetest.get_item_group(minetest.get_node(neighbor_pos).name, "webbing") > 0 then
minetest.get_node_timer(neighbor_pos):start(30)
end
end
minetest.get_node_timer(pos):stop()
end,
on_timer = function(pos, elapsed)
local webs = {}
local anchors = {}
get_web_nodes(pos, webs, anchors)
local first_anchor = next(anchors)
for hash, _ in pairs(webs) do
local web_pos = minetest.get_position_from_hash(hash)
if first_anchor == nil then
-- unsupported web
minetest.set_node(web_pos, {name="air"})
minetest.item_drop(ItemStack("big_webs:webbing"), nil, web_pos)
end
minetest.get_node_timer(web_pos):stop() -- no need to recheck
end
end,
_mcl_blast_resistance = 1.0,
_mcl_hardness = 0.5,
})
minetest.register_node("big_webs:web_egg", {
description = S("Giant Cave Spider Web Generator"),
tiles = {
{name="big_webs.png"},
},
use_texture_alpha = "blend",
connects_to = {"group:soil", "group:stone", "group:tree", "group:leaves", "group:sand", "group:wood", "group:webbing"},
connect_sides = { "top", "bottom", "front", "left", "back", "right" },
drawtype = "nodebox",
node_box = get_node_box(0.0625),
collision_box = get_node_box(0.0625),
inventory_image = "big_webs_item.png",
wield_image = "big_webs_item.png",
paramtype = "light",
is_ground_content = false,
climbable = true,
floodable = true,
groups = {snappy = 2, choppy = 2, webbing = 1, flammable=1, fall_damage_add_percent=-100, bouncy=20},
sounds = sound,
on_construct = function(pos)
minetest.get_node_timer(pos):start(1)
end,
on_timer = function(pos, elapsed)
minetest.set_node(pos, {name="air"})
generate_web(pos)
end,
_mcl_blast_resistance = 1.0,
_mcl_hardness = 0.5,
})