forked from thunderdog1138/star_wars
394 lines
10 KiB
Lua
394 lines
10 KiB
Lua
--
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-- Grow trees from saplings
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--
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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 node_under = minetest.get_node_or_nil({x = pos.x, y = pos.y - 1, z = pos.z})
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if not node_under then
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return false
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end
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local name_under = node_under.name
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local is_soil = minetest.get_item_group(name_under, "soil")
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if is_soil == 0 then
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return false
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end
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return true
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end
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-- Sapling ABM
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minetest.register_abm({
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nodenames = {"default:sapling", "default:junglesapling",
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"default:pine_sapling", "default:acacia_sapling"},
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interval = 10,
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chance = 50,
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action = function(pos, node)
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if not can_grow(pos) then
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return
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end
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local mapgen = minetest.get_mapgen_params().mgname
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if node.name == "default:sapling" then
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minetest.log("action", "A sapling grows into a tree at "..
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minetest.pos_to_string(pos))
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if mapgen == "v6" then
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default.grow_tree(pos, random(1, 4) == 1)
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else
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default.grow_new_apple_tree(pos)
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end
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elseif node.name == "default:junglesapling" then
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minetest.log("action", "A jungle sapling grows into a tree at "..
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minetest.pos_to_string(pos))
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if mapgen == "v6" then
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default.grow_jungle_tree(pos)
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else
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default.grow_new_jungle_tree(pos)
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end
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elseif node.name == "default:pine_sapling" then
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minetest.log("action", "A pine sapling grows into a tree at "..
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minetest.pos_to_string(pos))
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if mapgen == "v6" then
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default.grow_pine_tree(pos)
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else
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default.grow_new_pine_tree(pos)
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end
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elseif node.name == "default:acacia_sapling" then
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minetest.log("action", "An acacia sapling grows into a tree at "..
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minetest.pos_to_string(pos))
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default.grow_new_acacia_tree(pos)
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end
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end
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})
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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_tree(pos, is_apple_tree, bad)
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--[[
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NOTE: Tree-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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if bad then
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error("Deprecated use of default.grow_tree")
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end
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local x, y, z = pos.x, pos.y, pos.z
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local height = random(4, 5)
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local c_tree = minetest.get_content_id("default:tree")
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local c_leaves = minetest.get_content_id("default:leaves")
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local vm = minetest.get_voxel_manip()
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local minp, maxp = vm:read_from_map(
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{x = pos.x - 2, y = pos.y, z = pos.z - 2},
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{x = pos.x + 2, y = pos.y + height + 1, z = pos.z + 2}
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)
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local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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local data = vm:get_data()
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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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vm:set_data(data)
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vm:write_to_map()
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vm:update_map()
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end
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-- Jungle tree
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function default.grow_jungle_tree(pos, bad)
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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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if bad then
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error("Deprecated use of default.grow_jungle_tree")
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end
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local x, y, z = pos.x, pos.y, pos.z
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local height = random(8, 12)
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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_jungletree = minetest.get_content_id("default:jungletree")
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local c_jungleleaves = minetest.get_content_id("default:jungleleaves")
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local vm = minetest.get_voxel_manip()
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local minp, maxp = vm:read_from_map(
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{x = pos.x - 3, y = pos.y - 1, z = pos.z - 3},
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{x = pos.x + 3, y = pos.y + height + 1, z = pos.z + 3}
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)
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local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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local data = vm:get_data()
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add_trunk_and_leaves(data, a, pos, c_jungletree, c_jungleleaves, height, 3, 30, false)
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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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vm:set_data(data)
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vm:write_to_map()
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vm:update_map()
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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(pos)
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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_pine_tree = minetest.get_content_id("default:pine_tree")
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local c_pine_needles = minetest.get_content_id("default:pine_needles")
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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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local vm = minetest.get_voxel_manip()
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local minp, maxp = vm:read_from_map(
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{x = x - 3, y = y - 1, z = z - 3},
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{x = x + 3, y = maxy + 3, z = z + 3}
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)
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local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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local data = vm:get_data()
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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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vm:set_data(data)
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vm:write_to_map()
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vm:update_map()
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end
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-- New apple tree
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function default.grow_new_apple_tree(pos)
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local path = minetest.get_modpath("default") .. "/schematics/apple_tree_from_sapling.mts"
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minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
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path, 0, nil, false)
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end
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-- New jungle tree
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function default.grow_new_jungle_tree(pos)
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local path = minetest.get_modpath("default") .. "/schematics/jungle_tree_from_sapling.mts"
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minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
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path, 0, nil, false)
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end
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-- New pine tree
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function default.grow_new_pine_tree(pos)
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local path = minetest.get_modpath("default") .. "/schematics/pine_tree_from_sapling.mts"
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minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
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path, 0, nil, false)
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end
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-- New acacia tree
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function default.grow_new_acacia_tree(pos)
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local path = minetest.get_modpath("default") .. "/schematics/acacia_tree_from_sapling.mts"
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minetest.place_schematic({x = pos.x - 4, y = pos.y - 1, z = pos.z - 4},
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path, random, nil, false)
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end
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