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core.cljs
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core.cljs
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(ns pacman.core
(:require [pacman.ui :as ui]
[pacman.board :as board]
[pacman.util :as util]
[pacman.keys :as keyz]
[pacman.ghosts :as ghosts]
[pacman.tile :as _tile]
[pacman.levels :as levels]
[goog.Timer :as timer]
[goog.date :as date]))
(def points {:pellet 10 :energy 50 :no-food 0})
(def freeze-times {:pellet 1 :energy 3 :no-food 0})
(def deltas {:west [-1 0] :east [1 0] :north [0 -1] :south [0 1] :none [0 0]})
(def pacman-start {:pos (_tile/left (_tile/tile 14 26))
:tile (_tile/tile 14 26)
:face :west
:move-dir :west
:food-count 0
:freeze 0
:dead false
:ghost-eat-multiplier 0})
(def opposite-dir {:east :west
:west :east
:north :south
:south :north
:none :none})
(defn get-new-move-dir [x y kp old-dir board]
;; Reverse direction - don't need to be on a tile centre to do this.
(if (= old-dir (opposite-dir kp)) kp
(let [[tx ty] (_tile/tile-at x y)]
(if (_tile/tile-center? x y) ; TODO - allow fast cornering
(cond
;; Change direction
(and (= :north kp) (board/tile-open? [tx (- ty 1)])) (do (keyz/consume!) kp)
(and (= :south kp) (board/tile-open? [tx (+ ty 1)])) (do (keyz/consume!) kp)
(and (= :east kp) (board/tile-open? [(+ tx 1) ty])) (do (keyz/consume!) kp)
(and (= :west kp) (board/tile-open? [(- tx 1) ty])) (do (keyz/consume!) kp)
;; Keep going (if we can)
(and (= :north old-dir) (board/tile-open? [tx (- ty 1)])) old-dir
(and (= :south old-dir) (board/tile-open? [tx (+ ty 1)])) old-dir
(and (= :east old-dir) (board/tile-open? [(+ tx 1) ty])) old-dir
(and (= :west old-dir) (board/tile-open? [(- tx 1) ty])) old-dir
:else :none)
old-dir))))
(defn get-pacman-speed [state]
(if (not= 0 (get-in state [:pacman :freeze]))
0
(get-in state [:level-info :pacman-speed])))
(defn dec-if-gt-zero [x]
(if (< 0 x) (dec x) 0))
(defn frightened? [ghost]
(< 0 (ghost :fright-ticks)))
(defn pman-killed-by-ghost? [state]
(or
(and (not (frightened? (get-in state [:ghosts :blinky]))) (= (get-in state [:pacman :tile]) (get-in state [:ghosts :blinky :tile])))
(and (not (frightened? (get-in state [:ghosts :pinky]))) (= (get-in state [:pacman :tile]) (get-in state [:ghosts :pinky :tile])))
(and (not (frightened? (get-in state [:ghosts :inky]))) (= (get-in state [:pacman :tile]) (get-in state [:ghosts :inky :tile])))
(and (not (frightened? (get-in state [:ghosts :clyde]))) (= (get-in state [:pacman :tile]) (get-in state [:ghosts :clyde :tile])))))
(defn get-fright-ticks-for [ghost state]
(let [ghost (get-in state [:ghosts ghost])
fright-time (get-in state [:level-info :ghost-fright-time])]
(cond
(ghost :in-da-house) 0
:else fright-time)))
(defn tick-pacman [state kp]
(let [{old :pacman board :board tick :tick} state
[x y] (old :pos)
new-move-dir (get-new-move-dir x y kp (old :move-dir) board)
new-face (if (= :none new-move-dir) (old :face) new-move-dir)
[dx dy] (map #(* (get-pacman-speed state) %) (deltas new-move-dir))
[nx ny] [(mod (+ 224 x dx) 224) (+ y dy)]
new-tile (_tile/tile-at nx ny)]
(ui/put-pacman! [nx ny] new-face tick)
(let [[new-board score-diff freeze food-count new-ghosts ghost-eat-multiplier]
(if (and (not= (get-in board [new-tile :food]) :no-food) (not= (old :tile) new-tile)) ; ie we moved into a new tile, which has food in it.
(do
(ui/eat-at! new-tile)
[(assoc-in board [new-tile :food] :no-food)
(points (get-in board [new-tile :food]))
(freeze-times (get-in board [new-tile :food]))
(inc (old :food-count))
(if (= :energy (get-in board [new-tile :food]))
(-> (state :ghosts)
(assoc-in [:blinky :fright-ticks] (get-fright-ticks-for :blinky state))
(assoc-in [:pinky :fright-ticks] (get-fright-ticks-for :pinky state))
(assoc-in [:inky :fright-ticks] (get-fright-ticks-for :inky state))
(assoc-in [:clyde :fright-ticks] (get-fright-ticks-for :clyde state))
(assoc-in [:blinky :face] (opposite-dir (get-in state [:ghosts :blinky :face])))
(assoc-in [:pinky :face] (opposite-dir (get-in state [:ghosts :pinky :face])))
(assoc-in [:inky :face] (opposite-dir (get-in state [:ghosts :inky :face])))
(assoc-in [:clyde :face] (opposite-dir (get-in state [:ghosts :clyde :face]))))
(state :ghosts))
200
])
[board 0 (dec-if-gt-zero (old :freeze)) (old :food-count) (state :ghosts) 0])]
(let [is-dead (pman-killed-by-ghost? state)]
(assoc state
:pacman (assoc old
:face new-face
:move-dir new-move-dir
:pos [nx ny]
:tile new-tile
:food-count food-count
:freeze freeze
:ghost-eat-multiplier ghost-eat-multiplier
:dead is-dead)
:ghosts new-ghosts
:score (+ (state :score) score-diff)
:board new-board)))))
(defn ghost-turn [ghost]
(let [[x y] (ghost :pos)]
(if (_tile/tile-center? x y)
(ghost :next-turn)
(ghost :face))))
(defn in-tunnel? [[x y]]
(and (= y 17)
(or (< x 6) (> x 21))))
(defn ghost-speed [tile level-info]
(if (in-tunnel? tile)
(level-info :ghost-tunnel-speed)
(level-info :ghost-speed)))
(def i Math/floor)
(defn ghost-leaving-da-house-tick [name ghost level-info]
(let [[x y] (ghost :pos)]
(cond
(> (i x) 112)
(assoc ghost
:pos [(- x (level-info :ghost-house-speed)) y]
:face :west)
(< (i x) 112)
(assoc ghost
:pos [(+ x (level-info :ghost-house-speed)) y]
:face :east)
(= (i y) 116)
(let [[tx ty] (_tile/middle (ghost :target-tile))]
(assoc ghost
:face (if (> tx x) :west :east)
:in-da-house false))
:else
(assoc ghost
:pos [x (- y (level-info :ghost-house-speed))]
:face :north))))
(defn ghost-in-da-house-tick [name ghost level-info food-count]
(if (>= food-count (get-in level-info [:ghost-house-dotcounts name]))
(let [new-ghost (ghost-leaving-da-house-tick name ghost level-info)]
(ui/put-ghost! name (new-ghost :pos) (new-ghost :face) (new-ghost :target-tile) :normal)
new-ghost)
(let [[x y] (ghost :pos)
new-face (if (= 0 (mod (i y) 8)) (opposite-dir (ghost :face)) (ghost :face))
[dx dy] (map #(* (level-info :ghost-house-speed) %) (deltas new-face))
[nx ny] [(+ x dx) (+ y dy)]]
(ui/put-ghost! name [nx ny] new-face (ghost :target-tile) :normal)
(assoc ghost :face new-face :pos [nx ny]))))
(defn get-ghost-fright-mode [ticks]
(cond
(< ticks 10) :frightened
(< ticks 20) :recovering
(< ticks 30) :frightened
(< ticks 40) :recovering
(< ticks 50) :frightened
(< ticks 60) :recovering
:else :frightened))
(defn random-turn [ghost]
(let [[x y] (ghost :pos)]
(if (_tile/tile-center? x y)
(rand-nth (remove #(= % (opposite-dir (ghost :face))) (board/prop (ghost :tile) :ghost-exits)))
(ghost :face))))
(defn frightened-ghost-tick [name ghost level-info pacman-tile]
(let [[x y] (ghost :pos)
new-face (random-turn ghost)
[dx dy] (map #(* (level-info :ghost-fright-speed) %) (deltas new-face))
[nx ny] [(mod (+ 224 x dx) 224) (+ y dy)]
new-tile (_tile/tile-at nx ny)
dead (= (ghost :tile) pacman-tile)]
(ui/put-ghost! name (ghost :pos) :none (ghost :target-tile) (get-ghost-fright-mode (ghost :fright-ticks)))
(assoc ghost
:pos [nx ny]
:tile new-tile
:face new-face
:next-turn (opposite-dir new-face)
:dead dead
:fright-ticks (dec (ghost :fright-ticks)))))
(def dead-ghost-target-tile [13 14])
(defn ghost-dead-tick [name ghost]
(if (= (_tile/right dead-ghost-target-tile) (map i (ghost :pos)))
(assoc ghost
:fright-ticks 0
:dead false)
(let [[x y] (ghost :pos)
exits (board/prop (ghost :tile) :exits)
valid-exits (remove #(= (opposite-dir (ghost :face)) %) exits)
new-face (if (_tile/tile-center? x y) (ghosts/choose-exit (ghost :tile) dead-ghost-target-tile valid-exits) (ghost :face))
[dx dy] (deltas new-face)
[nx ny] [(mod (+ 224 x dx) 224) (+ y dy)]]
(ui/put-ghost! name [nx ny] new-face (ghost :target-tile) :dead)
(assoc ghost :pos [nx ny] :tile (_tile/tile-at nx ny) :face new-face))))
(defn tick-ghost [name ghost {level-info :level-info mode :ghost-mode {food-count :food-count pacman-tile :tile} :pacman} old-mode]
(cond
(ghost :dead) (ghost-dead-tick name ghost)
(ghost :in-da-house) (ghost-in-da-house-tick name ghost level-info food-count)
(< 0 (ghost :fright-ticks)) (frightened-ghost-tick name ghost level-info pacman-tile)
:else
(let [turnaround (not= mode old-mode)
[x y] (ghost :pos)
new-face (if turnaround (opposite-dir (ghost :face)) (ghost-turn ghost))
[dx dy] (map #(* (ghost-speed (ghost :tile) level-info) %) (deltas new-face))
[nx ny] [(mod (+ 224 x dx) 224) (+ y dy)]
new-tile (_tile/tile-at nx ny)]
(ui/put-ghost! name [nx ny] new-face (ghost :target-tile) :normal)
(let [next-turn
(if (or turnaround (not= (ghost :tile) new-tile))
(let [exits (board/prop new-tile :ghost-exits)
valid-exits (remove #(= (opposite-dir new-face) %) exits)]
(if (= 1 (count valid-exits))
(first valid-exits)
(ghosts/choose-exit new-tile (ghost :target-tile) valid-exits)))
(ghost :next-turn))]
(assoc ghost
:pos [nx ny]
:tile new-tile
:face new-face
:next-turn next-turn)))))
(defn tick-ghosts [old-mode state]
(let [ghosts (state :ghosts)]
(assoc ghosts
:blinky (tick-ghost :blinky (ghosts :blinky) state old-mode)
:pinky (tick-ghost :pinky (ghosts :pinky) state old-mode)
:inky (tick-ghost :inky (ghosts :inky) state old-mode)
:clyde (tick-ghost :clyde (ghosts :clyde) state old-mode))))
(defn tick-ghost-targets [{g :ghosts p :pacman t :tick mode :ghost-mode}]
(cond
(= :scatter mode)
(-> g
(assoc-in [:blinky :target-tile] (get-in g [:blinky :home]))
(assoc-in [:pinky :target-tile] (get-in g [:pinky :home]))
(assoc-in [:inky :target-tile] (get-in g [:inky :home]))
(assoc-in [:clyde :target-tile] (get-in g [:clyde :home])))
(= :chase mode)
(-> g
(assoc-in [:blinky :target-tile] (p :tile))
(assoc-in [:pinky :target-tile] (ghosts/pinky-target p))
(assoc-in [:inky :target-tile] (ghosts/inky-target p (g :blinky)))
(assoc-in [:clyde :target-tile] (ghosts/clyde-target p (g :clyde))))))
(defn new-ghost-mode [{tick :ghost-pattern-tick {times :ghost-mode-times} :level-info old-mode :ghost-mode}]
(get times tick old-mode))
(defn ghost-pattern-tick [state]
(if (= 0 (reduce + (map #(get-in state [:ghosts % :fright-ticks]) [:blinky :pinky :inky :clyde]))) ; ie if all ghosts are not frightened
(assoc state :ghost-pattern-tick (inc (state :ghost-pattern-tick)))
state))
(defn next-state [old-state kp]
; TODO - it would nice to rewrite this using only "->"
(let [new-state (assoc old-state :ghost-mode (new-ghost-mode old-state))
new-state (assoc new-state :ghosts (tick-ghost-targets old-state))
new-state (tick-pacman new-state kp)
new-state (assoc new-state :ghosts (tick-ghosts (old-state :ghost-mode) new-state)) ; ie avoid refering to new-state here.
new-state (assoc new-state :tick (inc (old-state :tick)))
new-state (ghost-pattern-tick new-state)]
new-state))
(defn current-time []
(. (date/DateTime.) (getTime)))
(defn gameloop [state loopstart]
(let [next (next-state state (keyz/kp))
now (current-time)
time-taken (- now loopstart)
sleep (- 33 time-taken)
real-sleep (if (> 0 sleep) 0 sleep)]
(if (not= sleep real-sleep)
(util/log (str "TOO SLOW @ " (state :tick))))
(if (not= (state :score) (next :score))
(ui/update-score! (next :score)))
(if (get-in state [:pacman :dead])
(timer/callOnce #(wait-for-start (next :score) (next :level-no) (next :board)))
(if (= 244 (get-in next [:pacman :food-count]))
(timer/callOnce #(reset-and-restart (next :score) (inc (next :level-no))))
(timer/callOnce #(gameloop next now) real-sleep)))))
(defn reset-and-restart [score level]
(ui/reset-edibles!)
(wait-for-start score level (board/get-default)))
(defn wait-for-start [score level board]
(ui/show-ready-message! level)
(if (= (keyz/kp) :start-game)
(do
(keyz/consume!)
(ui/clear-ready-message!)
(gameloop {:pacman pacman-start
:ghosts (ghosts/init)
:board board
:tick 0
:ghost-pattern-tick 0
:score score
:ghost-mode :scatter
:level-no level
:level-info (levels/level-info level)}
(current-time)))
(timer/callOnce #(wait-for-start score level board) 50)))
(do
(board/load)
(ui/initialize (board/get-default) pacman-start (ghosts/init))
(keyz/listen)
(wait-for-start 0 1 (board/get-default)))