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:
- dynamic and optional data types
- multiple function dispatch used to select function behavior by data type
- 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 corner on level 5 (centered 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 a 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>