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trees.lua
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trees.lua
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-- default/trees.lua
-- support for MT game translation.
local S = default.get_translator
local random = math.random
--
-- Grow trees from saplings
--
-- 'can grow' function
function default.can_grow(pos)
local node_under = minetest.get_node_or_nil({x = pos.x, y = pos.y - 1, z = pos.z})
if not node_under then
return false
end
if minetest.get_item_group(node_under.name, "soil") == 0 then
return false
end
local light_level = minetest.get_node_light(pos)
if not light_level or light_level < 13 then
return false
end
return true
end
function default.on_grow_failed(pos)
minetest.get_node_timer(pos):start(300)
end
-- 'is snow nearby' function
local function is_snow_nearby(pos)
return minetest.find_node_near(pos, 1, {"group:snowy"})
end
--
-- Tree generation
--
-- Apple tree and jungle tree trunk and leaves function
local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
height, size, iters, is_apple_tree)
local x, y, z = pos.x, pos.y, pos.z
local c_air = minetest.get_content_id("air")
local c_ignore = minetest.get_content_id("ignore")
local c_apple = minetest.get_content_id("default:apple")
-- Trunk
data[a:index(x, y, z)] = tree_cid -- Force-place lowest trunk node to replace sapling
for yy = y + 1, y + height - 1 do
local vi = a:index(x, yy, z)
local node_id = data[vi]
if node_id == c_air or node_id == c_ignore or node_id == leaves_cid then
data[vi] = tree_cid
end
end
-- Force leaves near the trunk
for z_dist = -1, 1 do
for y_dist = -size, 1 do
local vi = a:index(x - 1, y + height + y_dist, z + z_dist)
for x_dist = -1, 1 do
if data[vi] == c_air or data[vi] == c_ignore then
if is_apple_tree and random(1, 8) == 1 then
data[vi] = c_apple
else
data[vi] = leaves_cid
end
end
vi = vi + 1
end
end
end
-- Randomly add leaves in 2x2x2 clusters.
for i = 1, iters do
local clust_x = x + random(-size, size - 1)
local clust_y = y + height + random(-size, 0)
local clust_z = z + random(-size, size - 1)
for xi = 0, 1 do
for yi = 0, 1 do
for zi = 0, 1 do
local vi = a:index(clust_x + xi, clust_y + yi, clust_z + zi)
if data[vi] == c_air or data[vi] == c_ignore then
if is_apple_tree and random(1, 8) == 1 then
data[vi] = c_apple
else
data[vi] = leaves_cid
end
end
end
end
end
end
end
-- Apple tree
function default.grow_tree(pos, is_apple_tree, bad)
--[[
NOTE: Tree-placing code is currently duplicated in the engine
and in games that have saplings; both are deprecated but not
replaced yet
--]]
if bad then
error("Deprecated use of default.grow_tree")
end
local x, y, z = pos.x, pos.y, pos.z
local height = random(4, 5)
local c_tree = minetest.get_content_id("default:tree")
local c_leaves = minetest.get_content_id("default:leaves")
local vm = minetest.get_voxel_manip()
local minp, maxp = vm:read_from_map(
{x = x - 2, y = y, z = z - 2},
{x = x + 2, y = y + height + 1, z = z + 2}
)
local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
local data = vm:get_data()
add_trunk_and_leaves(data, a, pos, c_tree, c_leaves, height, 2, 8, is_apple_tree)
vm:set_data(data)
vm:write_to_map()
vm:update_map()
end
-- Jungle tree
function default.grow_jungle_tree(pos, bad)
--[[
NOTE: Jungletree-placing code is currently duplicated in the engine
and in games that have saplings; both are deprecated but not
replaced yet
--]]
if bad then
error("Deprecated use of default.grow_jungle_tree")
end
local x, y, z = pos.x, pos.y, pos.z
local height = random(8, 12)
local c_air = minetest.get_content_id("air")
local c_ignore = minetest.get_content_id("ignore")
local c_jungletree = minetest.get_content_id("default:jungletree")
local c_jungleleaves = minetest.get_content_id("default:jungleleaves")
local vm = minetest.get_voxel_manip()
local minp, maxp = vm:read_from_map(
{x = x - 3, y = y - 1, z = z - 3},
{x = x + 3, y = y + height + 1, z = z + 3}
)
local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
local data = vm:get_data()
add_trunk_and_leaves(data, a, pos, c_jungletree, c_jungleleaves,
height, 3, 30, false)
-- Roots
for z_dist = -1, 1 do
local vi_1 = a:index(x - 1, y - 1, z + z_dist)
local vi_2 = a:index(x - 1, y, z + z_dist)
for x_dist = -1, 1 do
if random(1, 3) >= 2 then
if data[vi_1] == c_air or data[vi_1] == c_ignore then
data[vi_1] = c_jungletree
elseif data[vi_2] == c_air or data[vi_2] == c_ignore then
data[vi_2] = c_jungletree
end
end
vi_1 = vi_1 + 1
vi_2 = vi_2 + 1
end
end
vm:set_data(data)
vm:write_to_map()
vm:update_map()
end
-- Pine tree from mg mapgen mod, design by sfan5, pointy top added by paramat
local function add_pine_needles(data, vi, c_air, c_ignore, c_snow, c_pine_needles)
local node_id = data[vi]
if node_id == c_air or node_id == c_ignore or node_id == c_snow then
data[vi] = c_pine_needles
end
end
local function add_snow(data, vi, c_air, c_ignore, c_snow)
local node_id = data[vi]
if node_id == c_air or node_id == c_ignore then
data[vi] = c_snow
end
end
function default.grow_pine_tree(pos, snow)
local x, y, z = pos.x, pos.y, pos.z
local maxy = y + random(9, 13) -- Trunk top
local c_air = minetest.get_content_id("air")
local c_ignore = minetest.get_content_id("ignore")
local c_pine_tree = minetest.get_content_id("default:pine_tree")
local c_pine_needles = minetest.get_content_id("default:pine_needles")
local c_snow = minetest.get_content_id("default:snow")
local vm = minetest.get_voxel_manip()
local minp, maxp = vm:read_from_map(
{x = x - 3, y = y, z = z - 3},
{x = x + 3, y = maxy + 3, z = z + 3}
)
local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
local data = vm:get_data()
-- Upper branches layer
local dev = 3
for yy = maxy - 1, maxy + 1 do
for zz = z - dev, z + dev do
local vi = a:index(x - dev, yy, zz)
local via = a:index(x - dev, yy + 1, zz)
for xx = x - dev, x + dev do
if random() < 0.95 - dev * 0.05 then
add_pine_needles(data, vi, c_air, c_ignore, c_snow,
c_pine_needles)
if snow then
add_snow(data, via, c_air, c_ignore, c_snow)
end
end
vi = vi + 1
via = via + 1
end
end
dev = dev - 1
end
-- Centre top nodes
add_pine_needles(data, a:index(x, maxy + 1, z), c_air, c_ignore, c_snow,
c_pine_needles)
add_pine_needles(data, a:index(x, maxy + 2, z), c_air, c_ignore, c_snow,
c_pine_needles) -- Paramat added a pointy top node
if snow then
add_snow(data, a:index(x, maxy + 3, z), c_air, c_ignore, c_snow)
end
-- Lower branches layer
local my = 0
for i = 1, 20 do -- Random 2x2 squares of needles
local xi = x + random(-3, 2)
local yy = maxy + random(-6, -5)
local zi = z + random(-3, 2)
if yy > my then
my = yy
end
for zz = zi, zi+1 do
local vi = a:index(xi, yy, zz)
local via = a:index(xi, yy + 1, zz)
for xx = xi, xi + 1 do
add_pine_needles(data, vi, c_air, c_ignore, c_snow,
c_pine_needles)
if snow then
add_snow(data, via, c_air, c_ignore, c_snow)
end
vi = vi + 1
via = via + 1
end
end
end
dev = 2
for yy = my + 1, my + 2 do
for zz = z - dev, z + dev do
local vi = a:index(x - dev, yy, zz)
local via = a:index(x - dev, yy + 1, zz)
for xx = x - dev, x + dev do
if random() < 0.95 - dev * 0.05 then
add_pine_needles(data, vi, c_air, c_ignore, c_snow,
c_pine_needles)
if snow then
add_snow(data, via, c_air, c_ignore, c_snow)
end
end
vi = vi + 1
via = via + 1
end
end
dev = dev - 1
end
-- Trunk
-- Force-place lowest trunk node to replace sapling
data[a:index(x, y, z)] = c_pine_tree
for yy = y + 1, maxy do
local vi = a:index(x, yy, z)
local node_id = data[vi]
if node_id == c_air or node_id == c_ignore or
node_id == c_pine_needles or node_id == c_snow then
data[vi] = c_pine_tree
end
end
vm:set_data(data)
vm:write_to_map()
vm:update_map()
end
-- New apple tree
function default.grow_new_apple_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/apple_tree_from_sapling.mts"
minetest.place_schematic({x = pos.x - 3, y = pos.y - 1, z = pos.z - 3},
path, "random", nil, false)
end
-- New jungle tree
function default.grow_new_jungle_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/jungle_tree_from_sapling.mts"
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "random", nil, false)
end
-- New emergent jungle tree
function default.grow_new_emergent_jungle_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/emergent_jungle_tree_from_sapling.mts"
minetest.place_schematic({x = pos.x - 3, y = pos.y - 5, z = pos.z - 3},
path, "random", nil, false)
end
-- New pine tree
function default.grow_new_pine_tree(pos)
local path
if math.random() > 0.5 then
path = minetest.get_modpath("default") ..
"/schematics/pine_tree_from_sapling.mts"
else
path = minetest.get_modpath("default") ..
"/schematics/small_pine_tree_from_sapling.mts"
end
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "0", nil, false)
end
-- New snowy pine tree
function default.grow_new_snowy_pine_tree(pos)
local path
if math.random() > 0.5 then
path = minetest.get_modpath("default") ..
"/schematics/snowy_pine_tree_from_sapling.mts"
else
path = minetest.get_modpath("default") ..
"/schematics/snowy_small_pine_tree_from_sapling.mts"
end
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "random", nil, false)
end
-- New acacia tree
function default.grow_new_acacia_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/acacia_tree_from_sapling.mts"
minetest.place_schematic({x = pos.x - 4, y = pos.y - 1, z = pos.z - 4},
path, "random", nil, false)
end
-- New aspen tree
function default.grow_new_aspen_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/aspen_tree_from_sapling.mts"
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "0", nil, false)
end
-- Bushes do not need 'from sapling' schematic variants because
-- only the stem node is force-placed in the schematic.
-- Bush
function default.grow_bush(pos)
local path = minetest.get_modpath("default") ..
"/schematics/bush.mts"
minetest.place_schematic({x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
path, "0", nil, false)
end
-- Blueberry bush
function default.grow_blueberry_bush(pos)
local path = minetest.get_modpath("default") ..
"/schematics/blueberry_bush.mts"
minetest.place_schematic({x = pos.x - 1, y = pos.y, z = pos.z - 1},
path, "0", nil, false)
end
-- Acacia bush
function default.grow_acacia_bush(pos)
local path = minetest.get_modpath("default") ..
"/schematics/acacia_bush.mts"
minetest.place_schematic({x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
path, "0", nil, false)
end
-- Pine bush
function default.grow_pine_bush(pos)
local path = minetest.get_modpath("default") ..
"/schematics/pine_bush.mts"
minetest.place_schematic({x = pos.x - 1, y = pos.y - 1, z = pos.z - 1},
path, "0", nil, false)
end
-- Large cactus
function default.grow_large_cactus(pos)
local path = minetest.get_modpath("default") ..
"/schematics/large_cactus.mts"
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "random", nil, false)
end
--
-- Sapling 'on place' function to check protection of node and resulting tree volume
--
function default.sapling_on_place(itemstack, placer, pointed_thing,
sapling_name, minp_relative, maxp_relative, interval)
-- Position of sapling
local pos = pointed_thing.under
local node = minetest.get_node_or_nil(pos)
local pdef = node and minetest.registered_nodes[node.name]
if pdef and pdef.on_rightclick and
not (placer and placer:is_player() and
placer:get_player_control().sneak) then
return pdef.on_rightclick(pos, node, placer, itemstack, pointed_thing)
end
if not pdef or not pdef.buildable_to then
pos = pointed_thing.above
node = minetest.get_node_or_nil(pos)
pdef = node and minetest.registered_nodes[node.name]
if not pdef or not pdef.buildable_to then
return itemstack
end
end
local player_name = placer and placer:get_player_name() or ""
-- Check sapling position for protection
if minetest.is_protected(pos, player_name) then
minetest.record_protection_violation(pos, player_name)
return itemstack
end
-- Check tree volume for protection
if minetest.is_area_protected(
vector.add(pos, minp_relative),
vector.add(pos, maxp_relative),
player_name,
interval) then
minetest.record_protection_violation(pos, player_name)
-- Print extra information to explain
minetest.chat_send_player(player_name,
S("@1 will intersect protection on growth.",
itemstack:get_definition().description))
return itemstack
end
if placer then
default.log_player_action(placer, "places node", sapling_name, "at", pos)
end
local take_item = not minetest.is_creative_enabled(player_name)
local newnode = {name = sapling_name}
local ndef = minetest.registered_nodes[sapling_name]
minetest.set_node(pos, newnode)
-- Run callback
if ndef and ndef.after_place_node then
-- Deepcopy place_to and pointed_thing because callback can modify it
if ndef.after_place_node(table.copy(pos), placer,
itemstack, table.copy(pointed_thing)) then
take_item = false
end
end
-- Run script hook
for _, callback in ipairs(minetest.registered_on_placenodes) do
-- Deepcopy pos, node and pointed_thing because callback can modify them
if callback(table.copy(pos), table.copy(newnode),
placer, table.copy(node or {}),
itemstack, table.copy(pointed_thing)) then
take_item = false
end
end
if take_item then
itemstack:take_item()
end
return itemstack
end
-- Grow sapling
default.sapling_growth_defs = {}
function default.register_sapling_growth(name, def)
default.sapling_growth_defs[name] = {
can_grow = def.can_grow or default.can_grow,
on_grow_failed = def.on_grow_failed or default.on_grow_failed,
grow = assert(def.grow)
}
end
function default.grow_sapling(pos)
local node = minetest.get_node(pos)
local sapling_def = default.sapling_growth_defs[node.name]
if not sapling_def then
minetest.log("warning", "default.grow_sapling called on undefined sapling " .. node.name)
return
end
if not sapling_def.can_grow(pos) then
sapling_def.on_grow_failed(pos)
return
end
minetest.log("action", "Growing sapling " .. node.name .. " at " .. minetest.pos_to_string(pos))
sapling_def.grow(pos)
end
local function register_sapling_growth(nodename, grow)
default.register_sapling_growth("default:" .. nodename, {grow = grow})
end
if minetest.get_mapgen_setting("mg_name") == "v6" then
register_sapling_growth("sapling", function(pos)
default.grow_tree(pos, random(1, 4) == 1)
end)
register_sapling_growth("junglesapling", default.grow_jungle_tree)
register_sapling_growth("pine_sapling", function(pos)
local snow = is_snow_nearby(pos)
default.grow_pine_tree(pos, snow)
end)
else
register_sapling_growth("sapling", default.grow_new_apple_tree)
register_sapling_growth("junglesapling", default.grow_new_jungle_tree)
register_sapling_growth("pine_sapling", function(pos)
local snow = is_snow_nearby(pos)
if snow then
default.grow_new_snowy_pine_tree(pos)
else
default.grow_new_pine_tree(pos)
end
end)
end
register_sapling_growth("acacia_sapling", default.grow_new_acacia_tree)
register_sapling_growth("aspen_sapling", default.grow_new_aspen_tree)
register_sapling_growth("bush_sapling", default.grow_bush)
register_sapling_growth("blueberry_bush_sapling", default.grow_blueberry_bush)
register_sapling_growth("acacia_bush_sapling", default.grow_acacia_bush)
register_sapling_growth("pine_bush_sapling", default.grow_pine_bush)
register_sapling_growth("emergent_jungle_sapling", default.grow_new_emergent_jungle_tree)
-- Backwards compatibility for saplings that used to use ABMs; does not need to include newer saplings.
minetest.register_lbm({
name = "default:convert_saplings_to_node_timer",
nodenames = {"default:sapling", "default:junglesapling",
"default:pine_sapling", "default:acacia_sapling",
"default:aspen_sapling"},
action = function(pos)
minetest.get_node_timer(pos):start(math.random(300, 1500))
end
})