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trees.lua
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trees.lua
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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
local name_under = node_under.name
local is_soil = minetest.get_item_group(name_under, "soil")
if is_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
-- 'is snow nearby' function
local function is_snow_nearby(pos)
return minetest.find_node_near(pos, 1,
{"default:snow", "default:snowblock", "default:dirt_with_snow"})
end
-- Sapling ABM
function default.grow_sapling(pos)
if not default.can_grow(pos) then
-- try a bit later again
minetest.get_node_timer(pos):start(math.random(240, 600))
return
end
local mg_name = minetest.get_mapgen_setting("mg_name")
local node = minetest.get_node(pos)
if node.name == "default:sapling" then
minetest.log("action", "A sapling grows into a tree at "..
minetest.pos_to_string(pos))
if mg_name == "v6" then
default.grow_tree(pos, random(1, 4) == 1)
else
default.grow_new_apple_tree(pos)
end
elseif node.name == "default:junglesapling" then
minetest.log("action", "A jungle sapling grows into a tree at "..
minetest.pos_to_string(pos))
if mg_name == "v6" then
default.grow_jungle_tree(pos)
else
default.grow_new_jungle_tree(pos)
end
elseif node.name == "default:pine_sapling" then
minetest.log("action", "A pine sapling grows into a tree at "..
minetest.pos_to_string(pos))
local snow = is_snow_nearby(pos)
if mg_name == "v6" then
default.grow_pine_tree(pos, snow)
elseif snow then
default.grow_new_snowy_pine_tree(pos)
else
default.grow_new_pine_tree(pos)
end
elseif node.name == "default:acacia_sapling" then
minetest.log("action", "An acacia sapling grows into a tree at "..
minetest.pos_to_string(pos))
default.grow_new_acacia_tree(pos)
elseif node.name == "default:aspen_sapling" then
minetest.log("action", "An aspen sapling grows into a tree at "..
minetest.pos_to_string(pos))
default.grow_new_aspen_tree(pos)
end
end
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(1200, 2400))
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 - 2, y = pos.y - 1, z = pos.z - 2},
path, "0", 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 pine tree
function default.grow_new_pine_tree(pos)
local path = minetest.get_modpath("default") ..
"/schematics/pine_tree_from_sapling.mts"
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 = minetest.get_modpath("default") ..
"/schematics/snowy_pine_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 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
--
-- 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(pos)
local pdef = minetest.registered_nodes[node.name]
if not pdef or not pdef.buildable_to then
pos = pointed_thing.above
node = minetest.get_node(pos)
pdef = minetest.registered_nodes[node.name]
if not pdef or not pdef.buildable_to then
return itemstack
end
end
local player_name = placer:get_player_name()
-- 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 not default.intersects_protection(
vector.add(pos, minp_relative),
vector.add(pos, maxp_relative),
player_name,
interval) then
minetest.set_node(pos, {name = sapling_name})
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
else
minetest.record_protection_violation(pos, player_name)
-- Print extra information to explain
minetest.chat_send_player(player_name, "Tree will intersect protection")
end
return itemstack
end