RCRPG/Julia
This Julia version of RCRPG implements a text interface. When run within Julia's command line REPL, it will display many of the game items in color.
Language Idioms
This program illustrates some of the interesting aspects of Julia:
- multiple function dispatch used to select function behavior by data argument type
- both dynamic and optionally strongly typed data types
- built-in data structures including named tuples, vectors, matrices, and Dicts (hashes)
- functional programming with map and other functions using anonymous functions on arrays
Objective
The objective of the game is to find your way to the treasure room, which is located in the upper left of level 5 (against the dungeon level 5 corner at (1, 1, 5)), and then to exit the game by ascending above level 1.
Commands
Direction commands:
north, south, east, west, up, down
Type the first letter of these commands
in order to go in a certain direction (n, s, e, w, u, d).
To exit a room, you must use the sledge to create a hole through the room wall, ceiling, or floor. Make a hole by e(q)uipping a sledge (equip with q), and (a)ttacking the obstacle (attack with a).
To go down, there must be a pit in the floor where you are standing. Create a pit by (a)ttacking (d)own.
In order to go up, there must be a skylight in the ceiling where you are standing and you must have a ladder equipped. Create a skylight with the sledge (attack up).
A sledge can be used indefinitely without losing it, but you lose your equipped ladder when you go up using that ladder.
Attack (dig with the sledgehammer) with the letter a. You must have a sledge equipped (equip with letter q) to do this.
Take gold and other items from room floor by standing over the item and then (t)aking with letter t.
Remove items with letter r for (r)emove. Removing equipped items will move to inventory, removing inventory drops them on the dungeon floor.
Rooms for each level remain only while you are on that level. Levels generate new rooms each time you renter them.
View inventory: Letter i.
Current r(o)om information: Letter o.
Help: Letter h.
Code
<lang julia>using Crayons
struct Point
x::Int y::Int z::Int
end
const obstacles = (wall = '\u2592', permwall = '\u2593', water = '~')
const defaults = (baseluck = 0.5, levelrooms = 8, itemrarity = 0.2, maxroomdim = 20,
wallheight = 3, leveldim = 100, prizeroomlevel = 5, fastdig = true, map = 1, showlevel = true)
abstract type Item end
struct Room
origin::Point xsize::Int ysize::Int
end
struct Level
map::Int grid::Matrix{Char} zbase::Int floorlevel::Int height::Int rooms::Vector{Room} content::Dict{Point, Vector{Item}}
end
struct Location
p::Point room::Union{Room, Nothing} level::Level
end
mutable struct Agent <: Item
location::Location inventory::Vector{Item} wearing::Vector{Item} wielding::Vector{Item} Agent(loc) = new(loc, Item[Gold(0)], Item[], Item[])
end
mutable struct Gold <: Item
value::Int disp::Char Gold(v::Int) = new(v, 'g')
end
struct Sledge <: Item
weight::Int disp::Char Sledge() = new(10, 's')
end
struct Ladder <: Item
weight::Int disp::Char Ladder() = new(7, 'l')
end
struct Pit <: Item
disp::Char Pit() = new('_')
end
struct Skylight <: Item
disp::Char Skylight() = new('^')
end
const charcrayons = Dict{Char,Crayon}('p' => crayon"white", ' ' => crayon"black", 'g' => crayon"yellow",
's' => crayon"blue", 'l' => crayon"green", '_' => crayon"red", '^' => crayon"light_cyan", '~' => crayon"blue", '\u2592' => crayon"light_gray", '\u2593' => crayon"dark_gray")
onpoint(p, level) = haskey(level.content, p) ? level.content[p] : Item[] hastype(t::Type, arr) = begin for i in arr if typeof(i) == t return true end end; false end hastype(t, p, level) = hastype(t, onpoint(p, level)) x1y1x2y2(room) = [room.origin.x, room.origin.y, room.origin.x + room.xsize, room.origin.y + room.ysize] inroom(x, y, rm) = begin x1, y1, x2, y2 = x1y1x2y2(rm); x1 <= x <= x2 && y1 <= y <= y2 end inroom(p::Point, rm) = inroom(p.x, p.y, rm) isinventory(t::Type, player) = hastype(t, player.inventory) iswielding(t::Type, player) = hastype(t, player.wielding) iswearing(t::Type, player) = hastype(t, player.wearing) isequip(i::Ladder) = true isequip(i::Sledge) = true isequip(i::Item) = false
function overlaps(testroom::Room, baseroom::Room, level::Level)
x1, y1, x2, y2 = x1y1x2y2(testroom) xx1, yy1, xx2, yy2 = x1y1x2y2(baseroom) x2 < xx1 || xx2 < x1 || y2 < yy1 || yy2 < y1 ? false : true
end
overlaps(notyet::Room, level::Level) = (for r in level.rooms if overlaps(notyet, r, level) return true end end; false) randpoint(level) = begin xmax, ymax = size(level.grid); Point(rand(1:xmax), rand(1:ymax), level.zbase) end addatpoint(i, p, lev) = (if !haskey(lev.content, p) lev.content[p] = Vector{Item}() end; push!(lev.content[p], i))
function randorigin(level, xd=defaults.maxroomdim, yd=defaults.maxroomdim)
xmax, ymax = size(level.grid) Point(rand(1:xmax-xd), rand(1:ymax-yd), level.zbase)
end
function notyetaroom(level::Level, origin::Point, minx=6, maxx=50, miny=6, maxy=25)
levsize = size(level.grid) if origin.x < 3 || origin.y < 3 origin = Point(3, 3, origin.z) end xmax, ymax = min(maxx, levsize[1] - origin.x), min(maxy, levsize[2] - origin.y) xsize = rand(minx:xmax) ysize = rand(miny:ymax) Room(origin, xsize, ysize)
end
function emptypoints(room, level)
vpt = Vector{Point}() x1, y1, x2, y2 = x1y1x2y2(room) for x in x1+1:x2-1, y in y1+1:y2-1 if level.grid[x, y] == ' ' push!(vpt, Point(x, y, level.zbase)) end end vpt
end randemptypoint(room, level) = (pts = emptypoints(room, level); isempty(pts) ? room.origin .+ 2 : rand(pts))
function addtoroom(item, room, level)
p = randemptypoint(room, level) addatpoint(item, p, level) level.grid[p.x, p.y] = item.disp
end
function fillroom(room, level, uppossible=true, downpossible=true)
grid = level.grid x1, y1, x2, y2 = x1y1x2y2(room) grid[x1:x2, y1:y2] .= ' ' grid[x1:x2, y1] .= obstacles.wall grid[x1:x2, y2] .= obstacles.wall grid[x1, y1:y2] .= obstacles.wall grid[x2, y1:y2] .= obstacles.wall for _ in 1:Int(floor(defaults.baseluck * 8)) if rand() < defaults.baseluck val = Int(floor(100.0 * rand() * defaults.baseluck)) addtoroom(Gold(val), room, level) end end if rand() * defaults.baseluck * 10 > 1.0 && uppossible addtoroom(Ladder(), room, level) end if rand() * defaults.baseluck * 15 > 1.0 && downpossible addtoroom(Pit(), room, level) end if rand() * defaults.baseluck * 5 > 1.0 addtoroom(Sledge(), room, level) end room
end
function makeprizeroom(level)
prizeroom = Room(Point(2, 2, level.zbase), defaults.maxroomdim, defaults.maxroomdim) x1, y1, x2, y2 = x1y1x2y2(prizeroom) level.grid[x1:x2, y1:y2] .= ' ' level.grid[x1:x2, y1] .= obstacles.permwall level.grid[x1:x2, y2] .= obstacles.wall level.grid[x1, y1:y2] .= obstacles.permwall level.grid[x2, y1:y2] .= obstacles.wall for _ in 1:Int(floor(defaults.baseluck * 40)) val = Int(floor(5000.0 * rand() * defaults.baseluck)) addtoroom(Gold(val), prizeroom, level) end prizeroom
end
function makelevel(floorlevel, gridsize=defaults.leveldim, height=defaults.wallheight, map=defaults.map)
grid = fill(obstacles.wall, gridsize, gridsize) grid[:, 1] .= obstacles.permwall grid[:, end] .= obstacles.permwall grid[1, :] .= obstacles.permwall grid[end, :] .= obstacles.permwall rooms = Vector{Room}() level = Level(map, grid, floorlevel * height, floorlevel, height, rooms, Dict()) if floorlevel == defaults.prizeroomlevel push!(rooms, makeprizeroom(level)) end trycount = 0 while trycount < defaults.levelrooms * 5 && length(rooms) < defaults.levelrooms rm = notyetaroom(level, randorigin(level)) if !overlaps(rm, level) fillroom(rm, level) push!(rooms, rm) end trycount += 1 end level
end
function displaytunnel(player)
p = player.location.p visgrid = view(player.location.level.grid, p.x-1:p.x+1, p.y-1:p.y+1) for y in 1:3 for x in 1:3 ch = (x == 2 == y) ? 'p' : visgrid[x, y] print(charcrayons[ch], ch) end println() end println()
end
function updateroom(player)
r = nothing for room in player.location.level.rooms if inroom(player.location.p, room) r = room break end end if r != player.location.room player.location = Location(player.location.p, r, player.location.level) end
end
function displayroom(player, lit=true)
println() if !lit return end x1, y1, x2, y2 = x1y1x2y2(player.location.room) playerx, playery = player.location.p.x, player.location.p.y for y in y1:y2 for x in x1:x2 ch = (x == playerx && y == playery) ? 'p' : player.location.level.grid[x, y] print(charcrayons[ch], ch) end println() end println()
end
function displaylevel(player, showunvisited=true)
mat = player.location.level.grid p = player.location.p for y in 1:size(mat)[2] println() for x in 1:size(mat)[1] print((x == p.x && y == p.y) ? 'p' : mat[x, y]) end end println
end
function queryprompt(query, choices, choicetxt="")
carr = map(x -> uppercase(strip(string(x))), collect(choices)) while true print(query, " ", choicetxt == "" ? carr : choicetxt, ": ") choice = uppercase(strip(readline(stdin))) if choice in carr return choice end println() end
end
help(player=nothing) =
println("n north, s south, w west, e east, d down, u up, i inventory, o roominfo, t take, r drop, q equip, a attack/dig")
function playerdisplayinventory(player)
println("Inventory: $(player.inventory)\n") println("Wielding: $(player.wielding)\n")
end
function playerroominfo(player)
if player.location.room == nothing println("You are between rooms on level $(player.location.level).") return end if player.location.level.floorlevel == defaults.prizeroomlevel println("The prize room is on this level!") end println("You are on level $(player.location.level.floorlevel). You look around the current room.") hasgold, hasladder, haspit, hassledge, hasdiggable = false, false, false, false, false saytype(t::Gold) = if !hasgold println("There is gold here."); hasgold = true end saytype(t::Ladder) = println("There is a ladder here.") saytype(t::Pit) = println("There is a pit here.") saytype(t::Sledge) = println("There is a sledgehammer here.") for (p, v) in player.location.level.content if inroom(p, player.location.room) for i in v saytype(i) end end end
end
function playerequip(player)
for (i, item) in enumerate(player.inventory) if isequip(item) yn = queryprompt("Equip $item? (y)es, (n)o, (q)uit choice", ["Y", "N", "Q"]) if yn == "Y" if iswielding(typeof(item), player) println("You are already wielding a $(typeof(item)).") else push!(player.wielding, item) deleteat!(player.inventory, i) end elseif yn == "Q" break end end end
end
function playerremove(player)
for (i, item) in enumerate(player.wielding) if iswielding(typeof(item), player) yn = queryprompt("Unequip $item? (y)es, (n)o, (q)uit choice", ["Y", "N", "Q"]) if yn == "Y" push!(player.inventory, item) deleteat!(player.wielding, i) elseif yn == "Q" break end end end for (i, item) in enumerate(player.inventory) if isinventory(item) yn = queryprompt("Drop $item? (y)es, (n)o, (q)uit choice", ["Y", "N", "Q"]) if yn == "Y" if !haskey(player.location.level.content, player.location.p) player.location.level.content[player.location.p] = Vector{Item}() end push!(player.location.level.content[player.location.p], item) deleteat!(player.inventory, i) elseif yn == "Q" break end end end
end
function playertake(player)
function addgold(gitem) if findfirst(x -> typeof(x) == Gold, player.inventory) == nothing push!(player.inventory, Gold(0)) end player.inventory[findall(x -> typeof(x) == Gold, player.inventory)[1]].value += gitem.value end canpickup(i::Gold) = true canpickup(i::Sledge) = true canpickup(i::Ladder) = true canpickup(i::Item) = (println("Cannot pick that up."); false) takeit(g::Gold) = begin addgold(g); println("You add $(g.value) in gold.") end takeit(s::Sledge) = begin push!(player.inventory, s); println("You have a sledge.") end takeit(s::Ladder) = begin push!(player.inventory, s); println("You have a ladder.") end
d = player.location.level.content if player.location.room != nothing && haskey(d, player.location.p) for _ in 1:length(d[player.location.p]) item = pop!(d[player.location.p]) if canpickup(item) takeit(item) else pushfirst!(d[player.location.p], item) end end if isempty(d[player.location.p]) delete!(d, player.location.p) player.location.level.grid[player.location.p.x, player.location.p.y] = ' ' else player.location.level.grid[player.location.p.x, player.location.p.y] = d[player.location.p][1].disp end end
end
function exitmap(player)
println("You exit the game with inventory $(player.inventory), wielding $(player.wielding).") exit()
end
function newlevel(player, levelsdown, startup=false)
oldlevel = player.location.level.floorlevel newlevel = oldlevel + levelsdown if newlevel < 1 exitmap(player) else level = makelevel(newlevel) room = rand(level.rooms) point = randemptypoint(room, level) player.location = Location(point, room, level) playerroominfo(player) end if defaults.showlevel displaylevel(player) end player
end
function playerup(player)
if haskey(player.location.level.content, player.location.p) && hastype(Skylight, player.location.p, player.location.level) && iswielding(Ladder, player) deleteat!(player.wielding, findfirst(i -> typeof(i) == Ladder, player.wielding)) println("You have to leave your ladder behind.") newlevel(player, -1) else println("You need to wield a ladder while at a skylight to go upwards.") end
end
function playerdown(player)
if haskey(player.location.level.content, player.location.p) && hastype(Pit, player.location.p, player.location.level) newlevel(player, 1) else println("You can only move downwards at a Pit in the floor.") end
end
function playerdig(player)
movedirs = Dict("N" => [0, -1], "W" => [-1, 0], "S" => [0, 1], "E" => [1, 0]) if !iswielding(Sledge, player) println("You need to be wielding a Sledge.") return end direc = queryprompt("Direction?", ["N", "S", "E", "W", "U", "D"]) if direc == "U" if rand() < defaults.baseluck addatpoint(Skylight(), player.location.p, player.location.level) player.location.level.grid[player.location.p.x, player.location.p.y] = '^' println("There is now a hole in the ceiling above you.") end elseif direc == "D" if rand() < defaults.baseluck addatpoint(Pit(), player.location.p, player.location.level) player.location.level.grid[player.location.p.x, player.location.p.y] = '_' println("There is now a pit in the floor at your feet.") end else goalp = Point(player.location.p.x + movedirs[direc][1], player.location.p.y + movedirs[direc][2], player.location.p.z) if player.location.level.grid[goalp.x, goalp.y] == obstacles.wall if rand() < defaults.baseluck if defaults.fastdig depth = 0 for i in 1:div(defaults.leveldim, 10) p = Point(player.location.p.x + movedirs[direc][1] * i, player.location.p.y + movedirs[direc][2] * i, player.location.p.z) if player.location.level.grid[p.x, p.y] == obstacles.wall player.location.level.grid[p.x, p.y] = ' ' depth += 1 end end if depth > 3 println("Boom! Your sledgehammer's attack on this wall is amazing.") end else player.location.level.grid[goalp.x, goalp.y] = ' ' end end elseif player.location.level.grid[goalp.x, goalp.y] == obstacles.permwall println("This kind of wall cannot be removed.") end end
end
function playermove(player, dx, dy)
goalp = Point(player.location.p.x + dx, player.location.p.y + dy, player.location.p.z) if player.location.level.grid[goalp.x, goalp.y] in obstacles println("Something is in the way.") else player.location = Location(goalp, player.location.room, player.location.level) end
end playerN(player) = playermove(player, 0, -1) playerW(player) = playermove(player, -1, 0) playerS(player) = playermove(player, 0, 1) playerE(player) = playermove(player, 1, 0)
const usercommands = Dict("N" => playerN, "S" => playerS, "E" => playerE, "W" => playerW,
"U" => playerup, "D" => playerdown, "I" => playerdisplayinventory, "O" => playerroominfo, "T" => playertake, "R" => playerremove, "Q" => playerequip, "A" => playerdig, "?" => help)
function runuser(player)
updateroom(player) if player.location.room == nothing displaytunnel(player) else displayroom(player) end choice = queryprompt("Choose move (nsewudiotrqa?)", ["N", "S", "E", "W", "U", "D", "I", "O", "T", "R", "Q", "A", "?"]) usercommands[choice](player)
end
function newplayer(newlevel=1)
level = makelevel(newlevel) room = rand(level.rooms) point = randemptypoint(room, level) player = Agent(Location(point, room, level)) playerroominfo(player) if defaults.showlevel displaylevel(player) end player
end
function rungame()
player = newplayer() while true runuser(player) end
end
rungame() </lang>