455 lines
12 KiB
Lua
455 lines
12 KiB
Lua
--
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-- Grow trees from saplings
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--
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-- add craft receipes for turning 1 tree into 4 corresponding wood;
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-- this function will be called for each registered tree
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local default_craft_wood_from_tree = function( tree_name, mod_prefix, nodes )
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if( not( nodes )
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or not( nodes.tree ) or not( nodes.tree.node_name )
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or not( nodes.wood ) or not( nodes.wood.node_name )) then
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return;
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end
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minetest.register_craft({
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-- the amount of wood given might be a global config variable
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output = nodes.wood.node_name..' 5',
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recipe = {
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{ nodes.tree.node_name },
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}
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});
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end
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trees_lib.register_on_new_tree_type( default_craft_wood_from_tree );
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-- 'Can grow' function
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local random = math.random
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local function can_grow(pos)
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local ll = minetest.get_node_light(pos)
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-- return -1 - no final abort, just don't grow yet
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if not ll or ll < 13 then -- Minimum light level for growth
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return -1 -- matches grass, wheat and cotton
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end
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return 1; -- the tree can grow
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end
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-- default trees grow using a function if they detect mapgen v6 - and a schematic otherwise
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local default_select_how_to_grow = function( pos, node, how_to_grow, ground_found )
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local mapgen = minetest.get_mapgen_params().mgname
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if mapgen == "v6" then
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-- select growing method 1 (previously set to a function)
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return 1;
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else
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-- select growing method 2 (previously set to a schematic)
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return 2;
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end
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end
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-- log successful growth; for that, we override the a_tree_has_grown function
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local old_a_tree_has_grown = trees_lib.a_tree_has_grown;
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trees_lib.a_tree_has_grown = function( pos, node, how_to_grow )
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minetest.log("action", "A "..tostring( node.name ).." grows into a tree at "..
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minetest.pos_to_string(pos))
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old_a_tree_has_grown( pos, node, how_to_grow );
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end
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--
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-- Tree generation
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--
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-- Apple tree and jungle tree trunk and leaves function
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local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
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height, size, iters, is_apple_tree)
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local x, y, z = pos.x, pos.y, pos.z
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local c_air = minetest.get_content_id("air")
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local c_ignore = minetest.get_content_id("ignore")
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local c_apple = minetest.get_content_id("default:apple")
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-- Trunk
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data[a:index(x, y, z)] = tree_cid -- Force-place lowest trunk node to replace sapling
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for yy = y + 1, y + height - 1 do
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local vi = a:index(x, yy, z)
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local node_id = data[vi]
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if node_id == c_air or node_id == c_ignore or node_id == leaves_cid then
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data[vi] = tree_cid
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end
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end
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-- Force leaves near the trunk
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for z_dist = -1, 1 do
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for y_dist = -size, 1 do
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local vi = a:index(x - 1, y + height + y_dist, z + z_dist)
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for x_dist = -1, 1 do
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if data[vi] == c_air or data[vi] == c_ignore then
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if is_apple_tree and random(1, 8) == 1 then
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data[vi] = c_apple
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else
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data[vi] = leaves_cid
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end
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end
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vi = vi + 1
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end
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end
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end
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-- Randomly add leaves in 2x2x2 clusters.
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for i = 1, iters do
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local clust_x = x + random(-size, size - 1)
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local clust_y = y + height + random(-size, 0)
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local clust_z = z + random(-size, size - 1)
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for xi = 0, 1 do
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for yi = 0, 1 do
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for zi = 0, 1 do
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local vi = a:index(clust_x + xi, clust_y + yi, clust_z + zi)
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if data[vi] == c_air or data[vi] == c_ignore then
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if is_apple_tree and random(1, 8) == 1 then
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data[vi] = c_apple
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else
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data[vi] = leaves_cid
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end
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end
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end
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end
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end
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end
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end
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-- Apple tree
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function default.grow_apple_tree( data, a, pos, sapling_data, extra_params )
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-- translate parameter names
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local c_tree = sapling_data.cid.tree;
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local c_leaves = sapling_data.cid.leaves;
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-- about every 4th tree is an apple tree
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local is_apple_tree = (random(1, 4) == 1);
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local height = random(4, 5)
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-- call the actual tree generation function
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add_trunk_and_leaves(data, a, pos, c_tree, c_leaves, height, 2, 8, is_apple_tree)
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end
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-- Jungle tree
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function default.grow_jungle_tree(data, a, pos, sapling_data, extra_params )
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--[[
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NOTE: Jungletree-placing code is currently duplicated in the engine
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and in games that have saplings; both are deprecated but not
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replaced yet
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--]]
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-- translate parameter names
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local c_jungletree = sapling_data.cid.tree;
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local c_jungleleaves = sapling_data.cid.leaves;
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local height = random(8, 12)
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add_trunk_and_leaves(data, a, pos, c_jungletree, c_jungleleaves, height, 3, 30, false)
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-- further parameters for the roots
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local x, y, z = pos.x, pos.y, pos.z
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local c_air = minetest.get_content_id("air")
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local c_ignore = minetest.get_content_id("ignore")
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-- Roots
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for z_dist = -1, 1 do
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local vi_1 = a:index(x - 1, y - 1, z + z_dist)
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local vi_2 = a:index(x - 1, y, z + z_dist)
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for x_dist = -1, 1 do
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if random(1, 3) >= 2 then
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if data[vi_1] == c_air or data[vi_1] == c_ignore then
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data[vi_1] = c_jungletree
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elseif data[vi_2] == c_air or data[vi_2] == c_ignore then
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data[vi_2] = c_jungletree
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end
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end
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vi_1 = vi_1 + 1
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vi_2 = vi_2 + 1
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end
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end
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end
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-- Pine tree from mg mapgen mod, design by sfan5, pointy top added by paramat
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local function add_pine_needles(data, vi, c_air, c_ignore, c_snow, c_pine_needles)
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local node_id = data[vi]
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if node_id == c_air or node_id == c_ignore or node_id == c_snow then
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data[vi] = c_pine_needles
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end
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end
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local function add_snow(data, vi, c_air, c_ignore, c_snow)
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local node_id = data[vi]
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if node_id == c_air or node_id == c_ignore then
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data[vi] = c_snow
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end
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end
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function default.grow_pine_tree(data, a, pos, sapling_data, extra_params )
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-- translate parameter names
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local c_pine_tree = sapling_data.cid.tree;
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local c_pine_needles = sapling_data.cid.leaves;
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-- other internal parameters
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local x, y, z = pos.x, pos.y, pos.z
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local maxy = y + random(9, 13) -- Trunk top
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local c_air = minetest.get_content_id("air")
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local c_ignore = minetest.get_content_id("ignore")
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local c_snow = minetest.get_content_id("default:snow")
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local c_snowblock = minetest.get_content_id("default:snowblock")
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local c_dirtsnow = minetest.get_content_id("default:dirt_with_snow")
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-- Scan for snow nodes near sapling to enable snow on branches
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local snow = false
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for yy = y - 1, y + 1 do
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for zz = z - 1, z + 1 do
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local vi = a:index(x - 1, yy, zz)
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for xx = x - 1, x + 1 do
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local nodid = data[vi]
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if nodid == c_snow or nodid == c_snowblock or nodid == c_dirtsnow then
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snow = true
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end
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vi = vi + 1
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end
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end
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end
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-- Upper branches layer
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local dev = 3
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for yy = maxy - 1, maxy + 1 do
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for zz = z - dev, z + dev do
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local vi = a:index(x - dev, yy, zz)
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local via = a:index(x - dev, yy + 1, zz)
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for xx = x - dev, x + dev do
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if random() < 0.95 - dev * 0.05 then
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add_pine_needles(data, vi, c_air, c_ignore, c_snow,
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c_pine_needles)
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if snow then
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add_snow(data, via, c_air, c_ignore, c_snow)
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end
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end
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vi = vi + 1
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via = via + 1
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end
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end
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dev = dev - 1
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end
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-- Centre top nodes
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add_pine_needles(data, a:index(x, maxy + 1, z), c_air, c_ignore, c_snow,
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c_pine_needles)
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add_pine_needles(data, a:index(x, maxy + 2, z), c_air, c_ignore, c_snow,
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c_pine_needles) -- Paramat added a pointy top node
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if snow then
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add_snow(data, a:index(x, maxy + 3, z), c_air, c_ignore, c_snow)
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end
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-- Lower branches layer
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local my = 0
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for i = 1, 20 do -- Random 2x2 squares of needles
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local xi = x + random(-3, 2)
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local yy = maxy + random(-6, -5)
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local zi = z + random(-3, 2)
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if yy > my then
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my = yy
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end
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for zz = zi, zi+1 do
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local vi = a:index(xi, yy, zz)
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local via = a:index(xi, yy + 1, zz)
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for xx = xi, xi + 1 do
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add_pine_needles(data, vi, c_air, c_ignore, c_snow,
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c_pine_needles)
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if snow then
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add_snow(data, via, c_air, c_ignore, c_snow)
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end
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vi = vi + 1
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via = via + 1
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end
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end
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end
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local dev = 2
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for yy = my + 1, my + 2 do
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for zz = z - dev, z + dev do
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local vi = a:index(x - dev, yy, zz)
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local via = a:index(x - dev, yy + 1, zz)
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for xx = x - dev, x + dev do
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if random() < 0.95 - dev * 0.05 then
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add_pine_needles(data, vi, c_air, c_ignore, c_snow,
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c_pine_needles)
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if snow then
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add_snow(data, via, c_air, c_ignore, c_snow)
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end
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end
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vi = vi + 1
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via = via + 1
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end
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end
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dev = dev - 1
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end
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-- Trunk
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data[a:index(x, y, z)] = c_pine_tree -- Force-place lowest trunk node to replace sapling
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for yy = y + 1, maxy do
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local vi = a:index(x, yy, z)
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local node_id = data[vi]
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if node_id == c_air or node_id == c_ignore or
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node_id == c_pine_needles or node_id == c_snow then
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data[vi] = c_pine_tree
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end
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end
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end
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--
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-- Trees
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--
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-- the normal tree does not have a special name and no space after it
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trees_lib.register_tree( "normal",
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{ tree = {
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node_name = "default:tree",
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tiles = {"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
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paramtype2 = "facedir",
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}, wood = {
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node_name = "default:wood",
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description = "Wooden Planks",
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tiles = {"default_wood.png"},
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}, sapling = {
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node_name = "default:sapling",
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description = "Sapling",
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tiles = {"default_sapling.png"},
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}, leaves = {
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node_name = "default:leaves",
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description = "Leaves",
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tiles = {"default_leaves.png"},
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special_tiles = {"default_leaves_simple.png"},
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}, fruit = {
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node_name = "default:apple",
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description = "Apple",
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tiles = {"default_apple.png"},
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on_use = minetest.item_eat(2),
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}},
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-- growing methods:
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{
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{ -- the first growing method uses a function
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use_function = default.grow_apple_tree,
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xoff = 2, zoff = 2, yoff = 8, height = 15,
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}, { -- the second growing method (when mapgen is not v6) uses a schematic
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use_schematic = minetest.get_modpath("default") .. "/schematics/apple_tree_from_sapling.mts",
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xoff = 2, zoff = 2, yoff = 1, height = 10,
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}
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},
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-- grows on nodes of this type:
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{"group:soil"},
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-- can_grow_function: (in this case, checks if there is enough light)
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can_grow,
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-- select_how_to_grow_function:
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default_select_how_to_grow,
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-- interval (for the abm)
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10,
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-- chance (for the abm)
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50
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);
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-- the jungletree has no space between tree name and fruther parts of the name
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trees_lib.register_tree( "jungle",
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{ tree = {
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node_name = "default:jungletree",
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description = "Jungle Tree",
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tiles = {"default_jungletree_top.png", "default_jungletree_top.png",
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"default_jungletree.png"},
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}, wood = {
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node_name = "default:junglewood",
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description = "Junglewood Planks",
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tiles = {"default_junglewood.png"},
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}, sapling = {
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node_name = "default:junglesapling",
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description = "Jungle Sapling",
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tiles = {"default_junglesapling.png"},
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}, leaves = {
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node_name = "default:jungleleaves",
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description = "Jungle Leaves",
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tiles = {"default_jungleleaves.png"},
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special_tiles = {"default_jungleleaves_simple.png"},
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-- the jungletree has no fruit
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}, fruit = {
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node_name = "air",
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}},
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{ { -- the first growing method uses a function
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use_function = default.grow_jungle_tree,
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xoff = 3, zoff = 3, yoff = 1, height = 15,
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},{ -- new jungle tree (grown from schematic)
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use_schematic = minetest.get_modpath("default") .. "/schematics/jungle_tree_from_sapling.mts",
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xoff = 2, zoff = 2, yoff = 1, height = 10,
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}
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},
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{"group:soil"},
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can_grow,
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default_select_how_to_grow,
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10, 50);
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-- the pine tree mostly follows naming conventions
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trees_lib.register_tree( "pine",
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-- ...except for the leaves, which are needles
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{ leaves = {
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node_name = "default:pine_needles",
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description = "Pine Needles",
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tiles = {"default_pine_needles.png"},
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-- the pine tree also has no fruit
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}, fruit = {
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node_name = "air",
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}},
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{
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{ -- the old pine tree (in mapgen v6) grows using a function
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use_function = default.grow_pine_tree,
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-- we need to know how much space will have to be loaded into voxelmanip
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xoff = 3, zoff = 3, yoff = 1, height = 18,
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}, { -- new pine tree (grown from schematic)
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use_schematic = minetest.get_modpath("default") .. "/schematics/pine_tree_from_sapling.mts",
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xoff = 2, zoff = 2, yoff = 1, height = 10,
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}
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},
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{"group:soil"},
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can_grow,
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default_select_how_to_grow,
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10, 50);
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-- the acacia tree follows naming conventions
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trees_lib.register_tree( "acacia",
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-- the acacia tree has no fruit
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{ fruit = {
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node_name = "air",
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}},
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-- the acacia only knows to grow from a schematic
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{
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{ -- new acacia tree (grown from schematic)
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use_schematic = minetest.get_modpath("default") .. "/schematics/acacia_tree_from_sapling.mts",
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xoff = 4, zoff = 4, yoff = 1, height = 10,
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}
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},
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{"group:soil","group:sand"},
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can_grow,
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-- the acacia only has the schematic version - there is no other growing method to select
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nil,
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10, 50);
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