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7d93272caa
minetest_game/mods/default/functions.lua
Auke Kok 7d93272caa Change how dirt turns to dirt_with_(something) 
This changes how dirt blocks turn to dirt_with -grass, -dry_grass
or -snow.

Previously, dirt that was sunlit would turn to dirt_with_grass no
matter what, but this happened without any context, so you could
get green patches of dirt_with_grass in the middle of a savannah or
even desert.

Dirt no longer turns to covered dirt unless it's within 1 node from
another dirt_with_grass or dirt_with_dry_grass or dirt_with_snow.
This makes dirt_with_grass "growback" a lot slower, since it now only
happens on the edges, but it retains the context nicely now.

If there is any dirt with a grass or dry grass plant, or snow on top,
and enough light, we'll convert it sporadically to dirt_with_grass
or dirt_with_dry_grass or dirt_with_snow.

This allows us to plant grass of our choice in a large dirt patch,
or in a region where otherwise that type of grass is not present.

This used to be done by 2 abms, but I've combined them in to a single
ABM that is ordered to run with maximum efficiency, solving for the
most common outcome first before attempting more complex checks.
2016-04-16 19:27:34 +01:00

459 lines
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-- mods/default/functions.lua
--
-- Sounds
--
function default.node_sound_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "", gain = 1.0}
table.dug = table.dug or
{name = "default_dug_node", gain = 0.25}
table.place = table.place or
{name = "default_place_node_hard", gain = 1.0}
return table
end
function default.node_sound_stone_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_hard_footstep", gain = 0.5}
table.dug = table.dug or
{name = "default_hard_footstep", gain = 1.0}
default.node_sound_defaults(table)
return table
end
function default.node_sound_dirt_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_dirt_footstep", gain = 1.0}
table.dug = table.dug or
{name = "default_dirt_footstep", gain = 1.5}
table.place = table.place or
{name = "default_place_node", gain = 1.0}
default.node_sound_defaults(table)
return table
end
function default.node_sound_sand_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_sand_footstep", gain = 0.12}
table.dug = table.dug or
{name = "default_sand_footstep", gain = 0.24}
table.place = table.place or
{name = "default_place_node", gain = 1.0}
default.node_sound_defaults(table)
return table
end
function default.node_sound_wood_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_wood_footstep", gain = 0.5}
table.dug = table.dug or
{name = "default_wood_footstep", gain = 1.0}
default.node_sound_defaults(table)
return table
end
function default.node_sound_leaves_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_grass_footstep", gain = 0.35}
table.dug = table.dug or
{name = "default_grass_footstep", gain = 0.7}
table.dig = table.dig or
{name = "default_dig_crumbly", gain = 0.4}
table.place = table.place or
{name = "default_place_node", gain = 1.0}
default.node_sound_defaults(table)
return table
end
function default.node_sound_glass_defaults(table)
table = table or {}
table.footstep = table.footstep or
{name = "default_glass_footstep", gain = 0.5}
table.dug = table.dug or
{name = "default_break_glass", gain = 1.0}
default.node_sound_defaults(table)
return table
end
--
-- Lavacooling
--
default.cool_lava = function(pos, node)
if node.name == "default:lava_source" then
minetest.set_node(pos, {name = "default:obsidian"})
else -- Lava flowing
minetest.set_node(pos, {name = "default:stone"})
end
minetest.sound_play("default_cool_lava",
{pos = pos, max_hear_distance = 16, gain = 0.25})
end
minetest.register_abm({
nodenames = {"default:lava_source", "default:lava_flowing"},
neighbors = {"group:water"},
interval = 1,
chance = 1,
catch_up = false,
action = function(...)
default.cool_lava(...)
end,
})
--
-- Papyrus and cactus growing
--
-- wrapping the functions in abm action is necessary to make overriding them possible
function default.grow_cactus(pos, node)
if node.param2 >= 4 then
return
end
pos.y = pos.y - 1
if minetest.get_item_group(minetest.get_node(pos).name, "sand") == 0 then
return
end
pos.y = pos.y + 1
local height = 0
while node.name == "default:cactus" and height < 4 do
height = height + 1
pos.y = pos.y + 1
node = minetest.get_node(pos)
end
if height == 4 or node.name ~= "air" then
return
end
minetest.set_node(pos, {name = "default:cactus"})
return true
end
function default.grow_papyrus(pos, node)
pos.y = pos.y - 1
local name = minetest.get_node(pos).name
if name ~= "default:dirt_with_grass" and name ~= "default:dirt" then
return
end
if not minetest.find_node_near(pos, 3, {"group:water"}) then
return
end
pos.y = pos.y + 1
local height = 0
while node.name == "default:papyrus" and height < 4 do
height = height + 1
pos.y = pos.y + 1
node = minetest.get_node(pos)
end
if height == 4 or node.name ~= "air" then
return
end
minetest.set_node(pos, {name = "default:papyrus"})
return true
end
minetest.register_abm({
nodenames = {"default:cactus"},
neighbors = {"group:sand"},
interval = 12,
chance = 83,
action = function(...)
default.grow_cactus(...)
end
})
minetest.register_abm({
nodenames = {"default:papyrus"},
neighbors = {"default:dirt", "default:dirt_with_grass"},
interval = 14,
chance = 71,
action = function(...)
default.grow_papyrus(...)
end
})
--
-- dig upwards
--
function default.dig_up(pos, node, digger)
if digger == nil then return end
local np = {x = pos.x, y = pos.y + 1, z = pos.z}
local nn = minetest.get_node(np)
if nn.name == node.name then
minetest.node_dig(np, nn, digger)
end
end
--
-- Fence registration helper
--
function default.register_fence(name, def)
minetest.register_craft({
output = name .. " 4",
recipe = {
{ def.material, 'group:stick', def.material },
{ def.material, 'group:stick', def.material },
}
})
local fence_texture = "default_fence_overlay.png^" .. def.texture ..
"^default_fence_overlay.png^[makealpha:255,126,126"
-- Allow almost everything to be overridden
local default_fields = {
paramtype = "light",
drawtype = "nodebox",
node_box = {
type = "connected",
fixed = {{-1/8, -1/2, -1/8, 1/8, 1/2, 1/8}},
-- connect_top =
-- connect_bottom =
connect_front = {{-1/16,3/16,-1/2,1/16,5/16,-1/8},
{-1/16,-5/16,-1/2,1/16,-3/16,-1/8}},
connect_left = {{-1/2,3/16,-1/16,-1/8,5/16,1/16},
{-1/2,-5/16,-1/16,-1/8,-3/16,1/16}},
connect_back = {{-1/16,3/16,1/8,1/16,5/16,1/2},
{-1/16,-5/16,1/8,1/16,-3/16,1/2}},
connect_right = {{1/8,3/16,-1/16,1/2,5/16,1/16},
{1/8,-5/16,-1/16,1/2,-3/16,1/16}},
},
connects_to = {"group:fence", "group:wood", "group:tree"},
inventory_image = fence_texture,
wield_image = fence_texture,
tiles = {def.texture},
sunlight_propagates = true,
is_ground_content = false,
groups = {},
}
for k, v in pairs(default_fields) do
if not def[k] then
def[k] = v
end
end
-- Always add to the fence group, even if no group provided
def.groups.fence = 1
def.texture = nil
def.material = nil
minetest.register_node(name, def)
end
--
-- Leafdecay
--
default.leafdecay_trunk_cache = {}
default.leafdecay_enable_cache = true
-- Spread the load of finding trunks
default.leafdecay_trunk_find_allow_accumulator = 0
minetest.register_globalstep(function(dtime)
local finds_per_second = 5000
default.leafdecay_trunk_find_allow_accumulator =
math.floor(dtime * finds_per_second)
end)
default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
if placer and not placer:get_player_control().sneak then
local node = minetest.get_node(pos)
node.param2 = 1
minetest.set_node(pos, node)
end
end
minetest.register_abm({
nodenames = {"group:leafdecay"},
neighbors = {"air", "group:liquid"},
-- A low interval and a high inverse chance spreads the load
interval = 2,
chance = 5,
action = function(p0, node, _, _)
--print("leafdecay ABM at "..p0.x..", "..p0.y..", "..p0.z..")")
local do_preserve = false
local d = minetest.registered_nodes[node.name].groups.leafdecay
if not d or d == 0 then
--print("not groups.leafdecay")
return
end
local n0 = minetest.get_node(p0)
if n0.param2 ~= 0 then
--print("param2 ~= 0")
return
end
local p0_hash = nil
if default.leafdecay_enable_cache then
p0_hash = minetest.hash_node_position(p0)
local trunkp = default.leafdecay_trunk_cache[p0_hash]
if trunkp then
local n = minetest.get_node(trunkp)
local reg = minetest.registered_nodes[n.name]
-- Assume ignore is a trunk, to make the thing
-- work at the border of the active area
if n.name == "ignore" or (reg and reg.groups.tree and
reg.groups.tree ~= 0) then
--print("cached trunk still exists")
return
end
--print("cached trunk is invalid")
-- Cache is invalid
table.remove(default.leafdecay_trunk_cache, p0_hash)
end
end
if default.leafdecay_trunk_find_allow_accumulator <= 0 then
return
end
default.leafdecay_trunk_find_allow_accumulator =
default.leafdecay_trunk_find_allow_accumulator - 1
-- Assume ignore is a trunk, to make the thing
-- work at the border of the active area
local p1 = minetest.find_node_near(p0, d, {"ignore", "group:tree"})
if p1 then
do_preserve = true
if default.leafdecay_enable_cache then
--print("caching trunk")
-- Cache the trunk
default.leafdecay_trunk_cache[p0_hash] = p1
end
end
if not do_preserve then
-- Drop stuff other than the node itself
local itemstacks = minetest.get_node_drops(n0.name)
for _, itemname in ipairs(itemstacks) do
if minetest.get_item_group(n0.name, "leafdecay_drop") ~= 0 or
itemname ~= n0.name then
local p_drop = {
x = p0.x - 0.5 + math.random(),
y = p0.y - 0.5 + math.random(),
z = p0.z - 0.5 + math.random(),
}
minetest.add_item(p_drop, itemname)
end
end
-- Remove node
minetest.remove_node(p0)
nodeupdate(p0)
end
end
})
--
-- Convert dirt to something that fits the environment
--
minetest.register_abm({
nodenames = {"default:dirt"},
neighbors = {
"default:dirt_with_grass",
"default:dirt_with_dry_grass",
"default:dirt_with_snow",
"default:grass_1",
"default:grass_2",
"default:grass_3",
"default:grass_4",
"default:grass_5",
"default:dry_grass_1",
"default:dry_grass_2",
"default:dry_grass_3",
"default:dry_grass_4",
"default:dry_grass_5",
"default:snow",
},
interval = 6,
chance = 67,
catch_up = false,
action = function(pos, node)
-- Most likely case, half the time it's too dark for this.
local above = {x = pos.x, y = pos.y + 1, z = pos.z}
if (minetest.get_node_light(above) or 0) < 13 then
return
end
-- Look for likely neighbors.
local p2 = minetest.find_node_near(pos, 1, {"default:dirt_with_grass",
"default:dirt_with_dry_grass", "default:dirt_with_snow"})
if p2 then
-- But the node needs to be under air in this case.
local n2 = minetest.get_node(above)
if n2 and n2.name == "air" then
local n3 = minetest.get_node(p2)
minetest.set_node(pos, {name = n3.name})
return
end
end
-- Anything on top?
local n2 = minetest.get_node(above)
if not n2 then
return
end
local name = n2.name
-- Snow check is cheapest, so comes first.
if name == "default:snow" then
minetest.set_node(pos, {name = "default:dirt_with_snow"})
-- Most likely case first.
elseif name:sub(1, 13) == "default:grass" then
minetest.set_node(pos, {name = "default:dirt_with_grass"})
elseif name:sub(1, 17) == "default:dry_grass" then
minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
end
end
})
--
-- Grass and dry grass removed in darkness
--
minetest.register_abm({
nodenames = {
"default:dirt_with_grass",
"default:dirt_with_dry_grass",
"default:dirt_with_snow",
},
interval = 8,
chance = 50,
catch_up = false,
action = function(pos, node)
local above = {x = pos.x, y = pos.y + 1, z = pos.z}
local name = minetest.get_node(above).name
local nodedef = minetest.registered_nodes[name]
if name ~= "ignore" and nodedef and not ((nodedef.sunlight_propagates or
nodedef.paramtype == "light") and
nodedef.liquidtype == "none") then
minetest.set_node(pos, {name = "default:dirt"})
end
end
})
--
-- Moss growth on cobble near water
--
minetest.register_abm({
nodenames = {"default:cobble"},
neighbors = {"group:water"},
interval = 16,
chance = 200,
catch_up = false,
action = function(pos, node)
minetest.set_node(pos, {name = "default:mossycobble"})
end
})
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