Add //maze3d command
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README.md
13
README.md
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@ -15,6 +15,7 @@ If you can dream of it, it probably belongs here!
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- [`//torus <major_radius> <minor_radius> <node_name>`](#torus-major_radius-minor_radius-node_name)
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- [`//hollowtorus <major_radius> <minor_radius> <node_name>`](#hollowtorus-major_radius-minor_radius-node_name)
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- [`//maze <replace_node> [<seed>]`](#maze-replace_node-seed)
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- [`//maze3d <replace_node> [<seed>]`](#maze3d-replace_node-seed)
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- [`//multi <command_a> <command_b> .....`](#multi-command_a-command_b-command_c-)
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- [`//yy`](#yy)
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- [`//nn`](#nn)
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@ -77,13 +78,23 @@ Creates a hollow torus at position 1 with the radius major and minor radii. Work
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### `//maze <replace_node> [<seed>]`
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Generates a maze using replace_node as the walls and air as the paths. Uses [an algorithm of my own devising](https://starbeamrainbowlabs.com/blog/article.php?article=posts/070-Language-Review-Lua.html). It is guaranteed that you can get from every point to every other point in generated mazes, and there are no loops.
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A seed can optionally be provided, which will cause the same maze to be generated every time (otherwise `os.time()` is used to dynamically set the seed).
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Requires the currently selected area to be at least 3x3x3.
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```
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//maze ice
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//maze stone 1234
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```
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### `//maze3d <replace_node> [<seed>]`
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Same as `//maze`, but adapted for 3d - has all the same properties. Note that currently there's no way to adjust the height of the passageways generated (you'll need to scale the generated maze afterwards).
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Requires the currently selected area to be at least 3x3 on the x and z axes.
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```
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//maze glass
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//maze bush_leaves 12345
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```
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### `//multi <command_a> <command_b> <command_c> .....`
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Executes multi chat commands in sequence. Intended for _WorldEdit_ commands, but does work with others too. Don't forget a space between commands!
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@ -13,3 +13,4 @@ dofile(minetest.get_modpath("worldeditadditions") .. "/overlay.lua")
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dofile(minetest.get_modpath("worldeditadditions") .. "/ellipsoid.lua")
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dofile(minetest.get_modpath("worldeditadditions") .. "/torus.lua")
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dofile(minetest.get_modpath("worldeditadditions") .. "/maze.lua")
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dofile(minetest.get_modpath("worldeditadditions") .. "/maze3d.lua")
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@ -114,8 +114,8 @@ function worldedit.maze(pos1, pos2, target_node, seed)
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}
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-- minetest.log("action", "extent: ("..extent.x..", "..extent.y..", "..extent.z..")")
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if extent.x == 0 or extent.y == 0 or extent.z == 0 then
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minetest.log("info", "[worldeditadditions/maze] error: either x, y, or z of the extent was zero")
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if extent.x < 3 or extent.y < 3 or extent.z < 1 then
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minetest.log("info", "[worldeditadditions/maze] error: either x, y of the extent were less than 3, or z of the extent was less than 1")
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return 0
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end
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@ -0,0 +1,202 @@
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--- Generates a maze.
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-- Algorithm origin: https://starbeamrainbowlabs.com/blog/article.php?article=posts/070-Language-Review-Lua.html
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-- @module worldeditadditions.maze
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----------------------------------
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-- function to print out the world
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----------------------------------
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function printspace3d(space, w, h, d)
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for z = 0, d - 1, 1 do
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for y = 0, h - 1, 1 do
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local line = ""
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for x = 0, w - 1, 1 do
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line = line .. space[z][y][x]
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end
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print(line)
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end
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print("")
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end
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end
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-- Initialise the world
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start_time = os.clock()
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function generate_maze3d(seed, width, height, depth)
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print("Generating maze "..width.."x"..height.."x"..depth)
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math.randomseed(seed) -- seed the random number generator with the system clock
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width = width - 1
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height = height - 1
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local world = {}
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for z = 0, depth, 1 do
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world[z] = {}
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for y = 0, height, 1 do
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world[z][y] = {}
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for x = 0, width, 1 do
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world[z][y][x] = "#"
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end
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end
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end
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-- do a random walk to create pathways
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local nodes = {} -- the nodes left that we haven't investigated
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local curnode = 1 -- the node we are currently operating on
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local cx, cy, cz = 1, 1, 1 -- our current position
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table.insert(nodes, { x = cx, y = cy, z = cz })
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world[cz][cy][cx] = " "
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while #nodes > 0 do
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-- io.write("Nodes left: " .. curnode .. "\r")
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--print("Nodes left: " .. #nodes)
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local directions = "" -- the different directions we can move in
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if cz - 2 > 0 and world[cz - 2][cy][cx] == "#" then
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directions = directions .. "-"
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-- print("cz: "..cz..", cz - 2: "..(cz-2)..", here: '"..world[cz][cy][cx].."', there: '"..world[cz - 2][cy][cx].."'")
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end
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if cz + 2 < depth and world[cz + 2][cy][cx] == "#" then
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directions = directions .. "+"
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end
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if cy - 2 > 0 and world[cz][cy - 2][cx] == "#" then
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directions = directions .. "u"
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end
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if cy + 2 < height and world[cz][cy + 2][cx] == "#" then
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directions = directions .. "d"
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end
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if cx - 2 > 0 and world[cz][cy][cx - 2] == "#" then
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directions = directions .. "l"
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end
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if cx + 2 < width and world[cz][cy][cx + 2] == "#" then
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directions = directions .. "r"
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end
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print("Currently at ("..cx..", "..cy..", "..cz..") - directions: "..directions)
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--print("radar output: '" .. directions .. "' (length: " .. #directions .. "), curnode: " .. curnode)
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if #directions > 0 then
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-- we still have somewhere that we can go
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--print("This node is not a dead end yet.")
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local curdirnum = math.random(1, #directions)
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local curdir = string.sub(directions, curdirnum, curdirnum)
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print("Picked direction '"..curdir.."' (index "..curdirnum..")")
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if curdir == "+" then
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world[cz + 1][cy][cx] = " "
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world[cz + 2][cy][cx] = " "
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cz = cz + 2
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elseif curdir == "-" then
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world[cz - 1][cy][cx] = " "
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world[cz - 2][cy][cx] = " "
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cz = cz - 2
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elseif curdir == "u" then
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world[cz][cy - 1][cx] = " "
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world[cz][cy - 2][cx] = " "
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cy = cy - 2
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elseif curdir == "d" then
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world[cz][cy + 1][cx] = " "
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world[cz][cy + 2][cx] = " "
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cy = cy + 2
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elseif curdir == "l" then
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world[cz][cy][cx - 1] = " "
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world[cz][cy][cx - 2] = " "
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cx = cx - 2
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elseif curdir == "r" then
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world[cz][cy][cx + 1] = " "
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world[cz][cy][cx + 2] = " "
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cx = cx + 2
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end
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print("Now at ("..cx..", "..cy..", "..cz..") ")
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table.insert(nodes, { x = cx, y = cy, z = cz })
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else
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-- print("The node at " .. curnode .. " is a dead end.")
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table.remove(nodes, curnode)
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if #nodes > 0 then
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--print("performing teleport.");
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curnode = math.random(1, #nodes)
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--print("New node: " .. curnode)
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-- print("Nodes table: ")
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-- print_r(nodes)
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cx = nodes[curnode]["x"]
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cy = nodes[curnode]["y"]
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cz = nodes[curnode]["z"]
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else
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--print("Maze generation complete, no teleportation necessary.")
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end
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end
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-- io.read("*l")
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-- print("\n\n\n\n\n\n\n\n\n")
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-- printspace(world, width + 1, height + 1, depth + 1)
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end
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return world
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end
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-- local world = maze(os.time(), width, height)
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function worldedit.maze3d(pos1, pos2, target_node, seed)
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pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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-- pos2 will always have the highest co-ordinates now
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-- getExtent() returns the number of nodes in the VoxelArea, which might be larger than we actually asked for
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local extent = {
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x = (pos2.x - pos1.x) + 1,
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y = (pos2.y - pos1.y) + 1,
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z = (pos2.z - pos1.z) + 1
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}
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minetest.log("action", "extent: ("..extent.x..", "..extent.y..", "..extent.z..")")
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if extent.x < 3 or extent.y < 3 or extent.z < 3 then
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minetest.log("info", "[worldeditadditions/maze] error: either x, y, or z of the extent were less than 3")
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return 0
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end
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-- Fetch the nodes in the specified area
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local manip, area = worldedit.manip_helpers.init(pos1, pos2)
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local data = manip:get_data()
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local node_id_air = minetest.get_content_id("air")
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local node_id_target = minetest.get_content_id(target_node)
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-- minetest.log("action", "pos1: " .. worldeditadditions.vector.tostring(pos1))
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-- minetest.log("action", "pos2: " .. worldeditadditions.vector.tostring(pos2))
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minetest.log("action", "Generating "..extent.x.."x"..extent.z.."x"..extent.z.." 3d maze from pos1 " .. worldeditadditions.vector.tostring(pos1).." to pos2 "..worldeditadditions.vector.tostring(pos2))
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local maze = generate_maze3d(seed, extent.z, extent.y, extent.x) -- x & need to be the opposite way around to how we index it
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printspace3d(maze, extent.z, extent.y, extent.x)
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-- z y x is the preferred loop order, but that isn't really possible here
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for z = pos2.z, pos1.z, - 1 do
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for x = pos2.x, pos1.x, - 1 do
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for y = pos2.y, pos1.y, - 1 do
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local maze_x = (x - pos1.x) -- - 1
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local maze_y = (y - pos1.y) -- - 1
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local maze_z = (z - pos1.z) -- - 1
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if maze_x < 0 then maze_x = 0 end
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if maze_y < 0 then maze_y = 0 end
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if maze_z < 0 then maze_z = 0 end
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minetest.log("action", "x: "..x..", y: "..y..", z: "..z..", pos x: "..maze_x..", pos z: "..maze_z)
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minetest.log("action", "value: "..maze[maze_x][maze_y][maze_z])
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if maze[maze_x][maze_y][maze_z] == "#" then
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data[area:index(x, y, z)] = node_id_target
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else
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data[area:index(x, y, z)] = node_id_air
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end
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end
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end
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end
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-- Save the modified nodes back to disk & return
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worldedit.manip_helpers.finish(manip, data)
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return extent.x * extent.y * extent.z
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end
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@ -322,7 +322,7 @@ end
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minetest.register_chatcommand("/maze", {
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params = "<replace_node> [<seed>]",
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description = "Generates a maze covering the currently selected area with replace_node as the walls. Optionally takes a (integer) seed.",
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description = "Generates a maze covering the currently selected area (must be at least 3x3 on the x,z axes) with replace_node as the walls. Optionally takes a (integer) seed.",
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privs = { worldedit = true },
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func = safe_region(function(name, params_text)
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local replace_node, seed, has_seed = parse_params_maze(params_text)
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@ -335,10 +335,7 @@ minetest.register_chatcommand("/maze", {
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worldedit.player_notify(name, "Error: Invalid seed.")
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return false
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end
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if not seed then
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seed = os.time()
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end
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if not seed then seed = os.time() end
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local start_time = os.clock()
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local replaced = worldedit.maze(worldedit.pos1[name], worldedit.pos2[name], replace_node, seed)
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@ -365,3 +362,54 @@ minetest.register_chatcommand("/maze", {
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return (pos2.x - pos1.x) * (pos2.y - pos1.y) * (pos1.z - pos2.z)
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end)
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})
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-- ███ ███ █████ ███████ ███████ ██████ ██████
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-- ████ ████ ██ ██ ███ ██ ██ ██ ██
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-- ██ ████ ██ ███████ ███ █████ █████ ██ ██
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-- ██ ██ ██ ██ ██ ███ ██ ██ ██ ██
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-- ██ ██ ██ ██ ███████ ███████ ██████ ██████
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minetest.register_chatcommand("/maze3d", {
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params = "<replace_node> [<seed>]",
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description = "Generates a 3d maze covering the currently selected area (must be at least 3x3x3) with replace_node as the walls. Optionally takes a (integer) seed.",
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privs = { worldedit = true },
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func = safe_region(function(name, params_text)
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local replace_node, seed, has_seed = parse_params_maze(params_text)
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if not replace_node then
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worldedit.player_notify(name, "Error: Invalid node name.")
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return false
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end
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if not seed and has_seed then
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worldedit.player_notify(name, "Error: Invalid seed.")
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return false
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end
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if not seed then seed = os.time() end
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local start_time = os.clock()
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local replaced = worldedit.maze3d(worldedit.pos1[name], worldedit.pos2[name], replace_node, seed)
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local time_taken = os.clock() - start_time
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worldedit.player_notify(name, replaced .. " nodes replaced in " .. time_taken .. "s")
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minetest.log("action", name .. " used //maze at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", replacing " .. replaced .. " nodes in " .. time_taken .. "s")
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end, function(name, params_text)
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local replace_node, seed, has_seed = parse_params_maze(params_text)
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if not params_text then params_text = "" end
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if not replace_node then
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worldedit.player_notify(name, "Error: Invalid input '" .. params_text .. "' (specifically the replace node). Try '/help /maze3d' to learn how to use this command.")
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return 0
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end
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if not seed and has_seed then
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worldedit.player_notify(name, "Error: Invalid input '" .. params_text .. "' (specifically the seed). Try '/help /maze3d' to learn how to use this command.")
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return 0
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end
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local pos1 = worldedit.pos1[name]
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local pos2 = worldedit.pos2[name]
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return (pos2.x - pos1.x) * (pos2.y - pos1.y) * (pos1.z - pos2.z)
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end)
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})
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