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- --
- -- Grow trees
- --
- local random = math.random
- local function 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
- return true
- end
- -- Sapling ABMs
- minetest.register_abm({
- nodenames = {"default:sapling"},
- interval = 10,
- chance = 50,
- action = function(pos, node)
- if not can_grow(pos) then
- return
- end
- minetest.log("action", "A sapling grows into a tree at "..
- minetest.pos_to_string(pos))
- default.grow_tree(pos, random(1, 4) == 1)
- end
- })
- minetest.register_abm({
- nodenames = {"default:junglesapling"},
- interval = 11,
- chance = 50,
- action = function(pos, node)
- if not can_grow(pos) then
- return
- end
- minetest.log("action", "A jungle sapling grows into a tree at "..
- minetest.pos_to_string(pos))
- default.grow_jungle_tree(pos)
- end
- })
- minetest.register_abm({
- nodenames = {"default:pine_sapling"},
- interval = 12,
- chance = 50,
- action = function(pos, node)
- if not can_grow(pos) then
- return
- end
- minetest.log("action", "A pine sapling grows into a tree at "..
- minetest.pos_to_string(pos))
- default.grow_pine_tree(pos)
- end
- })
- -- Appletree, jungletree 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
- for y_dist = 0, height - 1 do
- local vi = a:index(x, y + y_dist, z)
- local node_id = data[vi]
- if y_dist == 0 or 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
- -- Appletree
- 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 = pos.x - 2, y = pos.y, z = pos.z - 2},
- {x = pos.x + 2, y = pos.y + height + 1, z = pos.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
- -- Jungletree
- 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 = pos.x - 3, y = pos.y - 1, z = pos.z - 3},
- {x = pos.x + 3, y = pos.y + height + 1, z = pos.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
- -- Pinetree 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)
- if data[vi] == c_air or data[vi] == c_ignore or data[vi] == c_snow then
- data[vi] = c_pine_needles
- end
- end
- local function add_snow(data, vi, c_air, c_ignore, c_snow)
- if data[vi] == c_air or data[vi] == c_ignore then
- data[vi] = c_snow
- end
- end
- function default.grow_pine_tree(pos)
- 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_pinetree = minetest.get_content_id("default:pinetree")
- local c_pine_needles = minetest.get_content_id("default:pine_needles")
- local c_snow = minetest.get_content_id("default:snow")
- local c_snowblock = minetest.get_content_id("default:snowblock")
- local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
- 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 = maxy + 3, z = z + 3}
- )
- local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
- local data = vm:get_data()
- -- Scan for snow nodes near sapling
- local snow = false
- for yy = y - 1, y + 1 do
- for zz = z - 1, z + 1 do
- local vi = a:index(x - 1, yy, zz)
- for xx = x - 1, x + 1 do
- local nodid = data[vi]
- if nodid == c_snow
- or nodid == c_snowblock
- or nodid == c_dirtsnow then
- snow = true
- end
- vi = vi + 1
- end
- end
- end
- -- 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
- local 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
- for yy = y, maxy do
- local vi = a:index(x, yy, z)
- data[vi] = c_pinetree
- end
- vm:set_data(data)
- vm:write_to_map()
- vm:update_map()
- end
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