177 lines
3.9 KiB
Fennel
177 lines
3.9 KiB
Fennel
(local lume (require :lib.lume))
|
|
(local map (require :game.tilemap))
|
|
(local tileset (require :game.tiles))
|
|
(local state (require :game.state))
|
|
(local helpers (require :game.helpers))
|
|
|
|
(local Rules {})
|
|
|
|
(local tetrominoes
|
|
{:O [["##"
|
|
"##"]]
|
|
|
|
:L [["###"
|
|
"# "]
|
|
|
|
["# "
|
|
"# "
|
|
"##"]
|
|
|
|
[" #"
|
|
"###"]
|
|
|
|
["##"
|
|
" #"
|
|
" #"]]
|
|
|
|
:J [["###"
|
|
" #"]
|
|
|
|
["##"
|
|
"# "
|
|
"# "]
|
|
|
|
["# "
|
|
"###"]
|
|
|
|
[" #"
|
|
" #"
|
|
"##"]]
|
|
|
|
:I [["####"]
|
|
|
|
["#"
|
|
"#"
|
|
"#"
|
|
"#"]]
|
|
|
|
:S [[" ##"
|
|
"## "]
|
|
|
|
["# "
|
|
"##"
|
|
" #"]]
|
|
|
|
:Z [["## "
|
|
" ##"]
|
|
|
|
[" #"
|
|
"##"
|
|
"# "]]
|
|
|
|
:T [["###"
|
|
" # "]
|
|
|
|
["# "
|
|
"##"
|
|
"# "]
|
|
|
|
[" # "
|
|
"###"]
|
|
|
|
[" #"
|
|
"##"
|
|
" #"]]})
|
|
|
|
(fn Rules.choose-random-tetromino []
|
|
(let [possible-values (icollect [k (pairs state.tetrominoes)] k)
|
|
ivalue (love.math.random (length possible-values))]
|
|
(. possible-values ivalue)))
|
|
|
|
(fn Rules.tetromino [k irotation]
|
|
(let [rotations (or (. state.tetrominoes k) [])
|
|
irotation (+ (% (- irotation 1) (length rotations)) 1)]
|
|
(. rotations irotation)))
|
|
|
|
(fn Rules.reset-game []
|
|
(set state.tetrominoes tetrominoes)
|
|
(set state.well (map.new-tilemap 12 21))
|
|
(for [y 0 19]
|
|
(map.set-itile-at 0 y state.well "X")
|
|
(map.set-itile-at 11 y state.well "X"))
|
|
(for [x 0 11]
|
|
(map.set-itile-at x 20 state.well "X"))
|
|
(set state.drop-speed-ms 750)
|
|
(Rules.play-next-piece))
|
|
|
|
(fn Rules.play-next-piece []
|
|
(let [piece (or state.next-piece (Rules.choose-random-tetromino))
|
|
x (math.floor (/ (- (length (. state.well 1)) 2) 2))]
|
|
(set state.current {: piece : x :y 0 :irotation 1})
|
|
(set state.next-piece (Rules.choose-random-tetromino))))
|
|
|
|
(fn Rules.current-tetromino []
|
|
(when state.current
|
|
(Rules.tetromino state.current.piece state.current.irotation)))
|
|
|
|
(fn solid-positions [tetromino ?x ?y]
|
|
(let [h (length tetromino)
|
|
w (length (. tetromino 1))
|
|
x (or ?x 0)
|
|
y (or ?y 0)]
|
|
(icollect [tx ty (helpers.all-coordinates w h)]
|
|
(let [itile (map.itile-at tx ty tetromino)]
|
|
(when (not= itile " ") [(+ x tx) (+ y ty) itile])))))
|
|
|
|
(fn Rules.collides? [tetromino x y]
|
|
(var collides false)
|
|
(when tetromino
|
|
(each [_ [wx wy] (ipairs (solid-positions tetromino x y)) :until collides]
|
|
(set collides (not= (map.itile-at wx wy state.well) " "))))
|
|
collides)
|
|
|
|
(fn Rules.place-piece [tetromino x y]
|
|
(each [_ [wx wy itile] (ipairs (solid-positions tetromino x y))]
|
|
(map.set-itile-at wx wy state.well itile)))
|
|
|
|
(fn Rules.try-move-piece [dx dy]
|
|
(when state.current
|
|
(let [tetromino (Rules.current-tetromino)
|
|
x (+ state.current.x dx)
|
|
y (+ state.current.y dy)
|
|
stopped (Rules.collides? tetromino x y)]
|
|
(if (and stopped (not= dy 0)) ; dropping
|
|
(do (Rules.place-piece tetromino state.current.x state.current.y)
|
|
(Rules.play-next-piece))
|
|
|
|
(not stopped)
|
|
(do (set state.current.x x)
|
|
(set state.current.y y))))))
|
|
|
|
(fn Rules.rotate [di]
|
|
(when state.current
|
|
(set state.current.irotation (+ state.current.irotation di))))
|
|
|
|
(set Rules.commands
|
|
{:move Rules.try-move-piece
|
|
:rotate Rules.rotate
|
|
:reset Rules.reset-game})
|
|
|
|
(set Rules.keymap
|
|
{:left [:move -1 0]
|
|
:right [:move 1 0]
|
|
:down [:move 0 1]
|
|
:up [:rotate 1]
|
|
:z [:rotate -1]
|
|
:x [:rotate 1]
|
|
:r [:reset]})
|
|
|
|
(fn Rules.run-command [cmd]
|
|
(when cmd
|
|
(let [[command & args] cmd
|
|
f (. Rules.commands command)]
|
|
(when f (f (table.unpack args))))))
|
|
|
|
(fn Rules.keypressed [key]
|
|
(Rules.run-command (. Rules.keymap key)))
|
|
|
|
(fn Rules.update [dt]
|
|
(let [drop-ms (- (or state.drop-ms state.drop-speed-ms) (* dt 1000))]
|
|
(if (<= drop-ms 0)
|
|
(do (set state.drop-ms nil)
|
|
(Rules.try-move-piece 0 1))
|
|
(set state.drop-ms drop-ms))))
|
|
|
|
Rules
|
|
|