snake-game: refactor and restruture
Sankaranarayanan Viswanathan
John Benediktsson
parent
38eb231977
commit
bb43e27b86
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@ -0,0 +1,11 @@
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! Copyright (C) 2015 Your name.
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! See http://factorcode.org/license.txt for BSD license.
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IN: snake-game.constants
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SYMBOLS: :left :right :up :down ;
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SYMBOLS: :head :body :tail ;
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CONSTANT: snake-game-dim { 12 10 }
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CONSTANT: snake-game-cell-size 20
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@ -0,0 +1,121 @@
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! Copyright (C) 2015 Your name.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays combinators kernel make math random
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sequences sets snake-game.constants snake-game.util sorting ;
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IN: snake-game.game
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TUPLE: snake-game
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snake snake-loc snake-dir food-loc
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{ next-turn-dir initial: f }
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{ score integer initial: 0 }
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{ paused? boolean initial: t }
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{ game-over? boolean initial: f } ;
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TUPLE: snake-part
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dir type ;
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C: <snake-part> snake-part
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: <snake> ( -- snake )
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[
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:left :head <snake-part> ,
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:left :body <snake-part> ,
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:left :tail <snake-part> ,
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] V{ } make ;
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: <snake-game> ( -- snake-game )
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snake-game new
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<snake> >>snake
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{ 5 4 } clone >>snake-loc
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:right >>snake-dir
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{ 1 1 } clone >>food-loc ;
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: game-loc>index ( loc -- n )
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first2 snake-game-dim first * + ;
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: index>game-loc ( n -- loc )
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snake-game-dim first /mod swap 2array ;
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: snake-shape ( snake -- dirs )
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[ dir>> ] map ;
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: grow-snake ( snake dir -- snake )
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opposite-dir :head <snake-part> prefix
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dup second :body >>type drop ;
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: move-snake ( snake dir -- snake )
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dupd [ snake-shape but-last ] dip
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opposite-dir prefix [ >>dir ] 2map ;
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: all-indices ( -- points )
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snake-game-dim first2 * iota ;
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: snake-occupied-locs ( snake head-loc -- points )
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[ dir>> relative-loc ] accumulate nip ;
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: snake-occupied-indices ( snake head-loc -- points )
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snake-occupied-locs [ game-loc>index ] map natural-sort ;
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: snake-unoccupied-indices ( snake head-loc -- points )
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[ all-indices ] 2dip snake-occupied-indices without ;
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: snake-will-eat-food? ( snake-game dir -- ? )
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[ [ food-loc>> ] [ snake-loc>> ] bi ] dip
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relative-loc = ;
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: update-score ( snake-game -- )
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[ 1 + ] change-score
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drop ;
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: update-snake-shape ( snake-game dir growing? -- )
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[ [ grow-snake ] curry change-snake ]
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[ [ move-snake ] curry change-snake ]
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if drop ;
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: update-snake-loc ( snake-game dir -- )
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[ relative-loc ] curry change-snake-loc drop ;
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: update-snake-dir ( snake-game dir -- )
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>>snake-dir drop ;
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: generate-food ( snake-game -- )
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[
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[ snake>> ] [ snake-loc>> ] bi
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snake-unoccupied-indices random index>game-loc
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] keep food-loc<< ;
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: game-in-progress? ( snake-game -- ? )
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[ game-over?>> ] [ paused?>> ] bi or not ;
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: ?handle-pending-turn ( snake-game -- )
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dup next-turn-dir>> [
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>>snake-dir
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f >>next-turn-dir
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] when* drop ;
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: snake-will-eat-itself? ( snake-game dir -- ? )
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[ [ snake>> ] [ snake-loc>> ] bi ] dip relative-loc
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[ snake-occupied-locs rest ] keep
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swap member? ;
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: game-over ( snake-game -- )
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t >>game-over? drop ;
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: update-snake ( snake-game dir -- )
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2dup snake-will-eat-food?
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{
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[ [ drop update-score ] [ 2drop ] if ]
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[ update-snake-shape ]
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[ drop update-snake-loc ]
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[ drop update-snake-dir ]
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[ nip [ generate-food ] [ drop ] if ]
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} 3cleave ;
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: do-game-step ( snake-game -- )
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dup game-in-progress? [
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dup ?handle-pending-turn
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dup snake-dir>>
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2dup snake-will-eat-itself?
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[ drop game-over ] [ update-snake ] if
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] [ drop ] if ;
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@ -1,28 +0,0 @@
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! Copyright (C) 2015 Sankaranarayanan Viswanathan
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays byte-vectors fry images kernel locals
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math sequences ;
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IN: snake-game.helper
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: new-image-like ( image w h -- image )
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[ clone ] 2dip
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[ 2array >>dim ] 2keep *
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over bytes-per-pixel * <byte-vector> >>bitmap ;
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:: image-part ( image x y w h -- image )
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image w h new-image-like :> new-image
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h iota [| i |
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new-image bitmap>>
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x y i + w image pixel-row-slice-at
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append! drop
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] each new-image ;
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:: generate-sprite-sheet ( image rows cols -- seq )
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cols rows 2array :> split-dims
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image dim>> split-dims [ / ] 2map first2 :> ( sw sh )
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rows iota [ sh * ] map :> ys
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cols iota [ sw * ] map :> xs
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ys xs [
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swap [ image ] 2dip sw sh image-part
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] cartesian-map f join ;
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@ -0,0 +1,21 @@
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! Copyright (C) 2015 Your name.
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! See http://factorcode.org/license.txt for BSD license.
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USING: assocs sets snake-game.constants ;
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IN: snake-game.input
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: key-action ( key -- action )
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H{
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{ "RIGHT" :right }
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{ "LEFT" :left }
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{ "UP" :up }
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{ "DOWN" :down }
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} at ;
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: quit-key? ( key -- ? )
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HS{ "ESC" "q" "Q" } in? ;
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: pause-key? ( key -- ? )
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HS{ " " "SPACE" "p" "P" } in? ;
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: new-game-key? ( key -- ? )
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HS{ "ENTER" "RET" "n" "N" } in? ;
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@ -1,388 +1,8 @@
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! Copyright (C) 2015 Sankaranarayanan Viswanathan
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays assocs calendar combinators destructors
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formatting hash-sets images.loader kernel locals make math
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namespaces opengl opengl.textures random sequences sets sorting
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snake-game.helper timers ui ui.gadgets ui.gadgets.status-bar
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ui.gadgets.worlds ui.gestures ui.render vocabs.loader ;
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USING: accessors sets snake-game.ui ui ui.gadgets.status-bar ui.gadgets.worlds ;
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IN: snake-game
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SYMBOLS: :left :right :up :down ;
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SYMBOLS: :head :body :tail ;
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SYMBOL: game-textures
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CONSTANT: snake-game-dim { 12 10 }
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TUPLE: snake-game
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snake snake-loc snake-dir food-loc
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{ next-turn-dir initial: f }
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{ score integer initial: 0 }
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{ paused? boolean initial: t }
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{ game-over? boolean initial: f } ;
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TUPLE: snake-part
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dir type ;
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: <snake-part> ( dir type -- snake-part )
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snake-part boa ;
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: <snake> ( -- snake )
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[
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:left :head <snake-part> ,
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:left :body <snake-part> ,
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:left :tail <snake-part> ,
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] V{ } make ;
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: <snake-game> ( -- snake-game )
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snake-game new
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<snake> >>snake
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{ 5 4 } clone >>snake-loc
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:right >>snake-dir
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{ 1 1 } clone >>food-loc ;
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TUPLE: snake-gadget < gadget
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snake-game timer textures ;
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: start-new-game ( snake-gadget -- )
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<snake-game> >>snake-game drop ;
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: <snake-gadget> ( -- snake-gadget )
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snake-gadget new
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[ start-new-game ] keep ;
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: opposite-dir ( dir -- dir )
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H{
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{ :left :right }
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{ :right :left }
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{ :up :down }
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{ :down :up }
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} at ;
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: lookup-texture ( key -- texture )
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game-textures get at ;
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: screen-loc ( loc -- loc )
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[ 20 * ] map ;
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: draw-sprite* ( key screen-loc -- )
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[ lookup-texture draw-texture ] with-translation ;
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: draw-sprite ( grid-loc key -- )
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swap screen-loc draw-sprite* ;
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: draw-food ( loc -- )
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"food" draw-sprite ;
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: draw-background ( -- )
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{ 0 0 } "background" draw-sprite ;
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: offset ( loc dim -- loc )
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[ + ] 2map ;
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: draw-snake-head ( loc facing-dir -- )
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dup name>> rest "head-" prepend
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[
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[ screen-loc ] dip
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{
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{ :right [ { -20 -10 } ] }
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{ :down [ { -10 -20 } ] }
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{ :up [ { -10 0 } ] }
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{ :left [ { 0 -10 } ] }
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} case offset
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] dip
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swap draw-sprite* ;
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: draw-snake-body ( loc from-dir to-dir -- )
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2array [ name>> rest ] map "body" prefix "-" join
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draw-sprite ;
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: draw-snake-tail ( loc facing-dir -- )
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name>> rest "tail-" prepend draw-sprite ;
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: draw-snake-part ( loc from-dir snake-part -- )
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dup type>> {
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{ :head [ drop opposite-dir draw-snake-head ] }
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{ :tail [ drop draw-snake-tail ] }
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{ :body [ dir>> draw-snake-body ] }
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} case ;
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: ?roll-over ( x max -- x )
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{
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{ [ 2dup >= ] [ 2drop 0 ] }
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{ [ over neg? ] [ nip 1 - ] }
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[ drop ]
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} cond ;
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: ?roll-over-x ( x -- x )
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snake-game-dim first ?roll-over ;
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: ?roll-over-y ( y -- y )
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snake-game-dim second ?roll-over ;
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: move ( loc dim -- loc )
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offset first2
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[ ?roll-over-x ] [ ?roll-over-y ] bi* 2array ;
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: relative-loc ( loc dir -- loc )
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{
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{ :left [ { -1 0 } move ] }
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{ :right [ { 1 0 } move ] }
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{ :up [ { 0 -1 } move ] }
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{ :down [ { 0 1 } move ] }
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} case ;
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: draw-snake-reduce-step ( loc from-dir snake-part -- {new-loc,new-from-dir} )
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nip dir>> [ relative-loc ] keep 2array ;
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: draw-snake ( snake loc from-dir -- )
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2array 2dup
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[
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[ first2 ] dip
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[ draw-snake-part ] [ draw-snake-reduce-step ] 3bi
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] reduce drop
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! make sure to draw the head again
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swap first [ first2 ] dip draw-snake-part ;
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: grow-snake ( snake dir -- snake )
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opposite-dir :head <snake-part> prefix
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dup second :body >>type drop ;
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: snake-shape ( snake -- dirs )
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[ dir>> ] map ;
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: move-snake ( snake dir -- snake )
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dupd [ snake-shape but-last ] dip
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opposite-dir prefix [ >>dir ] 2map ;
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: update-snake-shape ( snake-game dir growing? -- )
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[ [ grow-snake ] curry change-snake ]
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[ [ move-snake ] curry change-snake ]
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if drop ;
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: update-snake-loc ( snake-game dir -- )
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[ relative-loc ] curry change-snake-loc drop ;
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: update-snake-dir ( snake-game dir -- )
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>>snake-dir drop ;
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: point>index ( loc -- n )
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first2 [ ] [ snake-game-dim first * ] bi* + ;
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: index>point ( n -- loc )
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snake-game-dim first /mod swap 2array ;
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: snake-occupied-locs ( snake head-loc -- points )
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[ dir>> relative-loc ] accumulate nip ;
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: snake-occupied-indices ( snake head-loc -- points )
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snake-occupied-locs [ point>index ] map natural-sort ;
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: all-indices ( -- points )
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snake-game-dim first2 * iota ;
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: snake-unoccupied-indices ( snake head-loc -- points )
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[ all-indices ] 2dip snake-occupied-indices >hash-set without ;
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: snake-will-eat-itself? ( snake-game dir -- ? )
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[ [ snake>> ] [ snake-loc>> ] bi ] dip relative-loc
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[ snake-occupied-locs rest ] keep
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swap member? ;
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: snake-will-eat-food? ( snake-game dir -- ? )
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[ [ food-loc>> ] [ snake-loc>> ] bi ] dip
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relative-loc = ;
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: random-sample ( seq -- e )
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1 sample first ;
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: generate-food ( snake-game -- )
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[
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[ snake>> ] [ snake-loc>> ] bi
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snake-unoccupied-indices random-sample index>point
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] keep food-loc<< ;
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: update-score ( snake-game -- )
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[ 1 + ] change-score
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drop ;
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: update-snake ( snake-game dir -- )
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2dup snake-will-eat-food?
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{
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[ [ drop update-score ] [ 2drop ] if ]
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[ update-snake-shape ]
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[ drop update-snake-loc ]
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[ drop update-snake-dir ]
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[ nip [ generate-food ] [ drop ] if ]
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} 3cleave ;
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: game-over ( snake-game -- )
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t >>game-over? drop ;
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: game-in-progress? ( snake-game -- ? )
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[ game-over?>> ] [ paused?>> ] bi or not ;
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: ?handle-pending-turn ( snake-game -- )
|
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dup next-turn-dir>> [
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>>snake-dir
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f >>next-turn-dir
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] when* drop ;
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: do-game-step ( gadget -- )
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dup game-in-progress? [
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dup ?handle-pending-turn
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dup snake-dir>>
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2dup snake-will-eat-itself?
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[ drop game-over ] [ update-snake ] if
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] [ drop ] if ;
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: generate-status-message ( snake-game -- str )
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[ score>> "Score: %d" sprintf ]
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[
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{
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{ [ dup game-over?>> ] [ drop "Game Over" ] }
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{ [ dup paused?>> ] [ drop "Game Paused" ] }
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[ drop "Game In Progress" ]
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} cond
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]
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bi 2array " -- " join ;
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: update-status ( gadget -- )
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[ snake-game>> generate-status-message ] keep show-status ;
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: do-updates ( gadget -- )
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[ snake-game>> do-game-step ]
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[ update-status ]
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[ relayout-1 ]
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tri ;
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M: snake-gadget pref-dim*
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drop snake-game-dim [ 20 * 20 + ] map ;
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: load-sprite-image ( filename -- image )
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[ snake-game vocabulary>> vocab-dir ] dip
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"vocab:%s/%s" sprintf load-image ;
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: make-texture ( image -- texture )
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{ 0 0 } <texture> ;
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: make-sprites ( filename cols rows -- seq )
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[ load-sprite-image ] 2dip generate-sprite-sheet
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[ make-texture ] map ;
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: snake-head-textures ( -- assoc )
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"head.png" 1 4 make-sprites
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{ "head-up" "head-right" "head-down" "head-left" }
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[ swap 2array ] 2map ;
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:: assoc-with-value-like ( assoc key seq -- )
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key assoc at :> value
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seq [ [ value ] dip assoc set-at ] each ;
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: snake-body-textures ( -- assoc )
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"body.png" 3 2 make-sprites
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{ 1 2 3 4 5 6 }
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[ swap 2array ] 2map
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dup 1 { "body-right-up" "body-down-left" } assoc-with-value-like
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dup 2 { "body-down-right" "body-left-up" } assoc-with-value-like
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dup 3 { "body-right-right" "body-left-left" } assoc-with-value-like
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dup 4 { "body-up-up" "body-down-down" } assoc-with-value-like
|
||||
dup 5 { "body-up-right" "body-left-down" } assoc-with-value-like
|
||||
dup 6 { "body-right-down" "body-up-left" } assoc-with-value-like
|
||||
dup [ { 1 2 3 4 5 6 } ] dip [ delete-at ] curry each ;
|
||||
|
||||
: snake-tail-textures ( -- assoc )
|
||||
"tail.png" 2 2 make-sprites
|
||||
{ "tail-down" "tail-left" "tail-up" "tail-right" }
|
||||
[ swap 2array ] 2map ;
|
||||
|
||||
: food-texture ( -- assoc )
|
||||
"food" "food.png" load-sprite-image make-texture
|
||||
2array 1array ;
|
||||
|
||||
: background-texture ( -- assoc )
|
||||
"background" "background.png" load-sprite-image make-texture
|
||||
2array 1array ;
|
||||
|
||||
: load-game-textures ( snake-gadget -- textures )
|
||||
dup textures>> [ ] [
|
||||
[
|
||||
snake-head-textures %%
|
||||
snake-body-textures %%
|
||||
snake-tail-textures %%
|
||||
food-texture %%
|
||||
background-texture %%
|
||||
] H{ } make >>textures
|
||||
textures>>
|
||||
] ?if ;
|
||||
|
||||
M: snake-gadget draw-gadget*
|
||||
[ load-game-textures game-textures ] keep [
|
||||
draw-background
|
||||
{ 10 10 } [
|
||||
snake-game>>
|
||||
[ food-loc>> [ draw-food ] when* ]
|
||||
[
|
||||
[ snake>> ]
|
||||
[ snake-loc>> ]
|
||||
[ snake-dir>> opposite-dir ]
|
||||
tri draw-snake
|
||||
] bi
|
||||
] with-translation
|
||||
] curry with-variable ;
|
||||
|
||||
M: snake-gadget graft*
|
||||
[ [ do-updates ] curry 200 milliseconds every ] keep timer<< ;
|
||||
|
||||
M: snake-gadget ungraft*
|
||||
[ stop-timer f ] change-timer
|
||||
dup textures>> values [ dispose ] each
|
||||
f >>textures drop ;
|
||||
|
||||
: key-action ( key -- action )
|
||||
H{
|
||||
{ "RIGHT" :right }
|
||||
{ "LEFT" :left }
|
||||
{ "UP" :up }
|
||||
{ "DOWN" :down }
|
||||
} at ;
|
||||
|
||||
: quit-key? ( key -- ? )
|
||||
HS{ "ESC" "q" "Q" } in? ;
|
||||
|
||||
: pause-key? ( key -- ? )
|
||||
HS{ " " "SPACE" "p" "P" } in? ;
|
||||
|
||||
: new-game-key? ( key -- ? )
|
||||
HS{ "ENTER" "RET" "n" "N" } in? ;
|
||||
|
||||
: ?handle-movement-key ( snake-game key -- )
|
||||
key-action
|
||||
[
|
||||
2dup [ snake-dir>> opposite-dir ] dip =
|
||||
[ 2drop ] [ >>next-turn-dir drop ] if
|
||||
] [ drop ] if* ;
|
||||
|
||||
: toggle-game-pause ( snake-gadget -- )
|
||||
snake-game>> [ not ] change-paused? drop ;
|
||||
|
||||
: handle-key ( snake-gadget key -- )
|
||||
{
|
||||
{ [ dup quit-key? ] [ drop close-window ] }
|
||||
{ [ dup pause-key? ] [ drop toggle-game-pause ] }
|
||||
{ [ dup new-game-key? ] [ drop start-new-game ] }
|
||||
[
|
||||
[ snake-game>> ] dip over
|
||||
game-in-progress? [ ?handle-movement-key ] [ 2drop ] if
|
||||
]
|
||||
} cond ;
|
||||
|
||||
M: snake-gadget handle-gesture
|
||||
swap dup key-down?
|
||||
[ sym>> handle-key ] [ 2drop ] if f ;
|
||||
|
||||
: <snake-world-attributes> ( -- world-attributes )
|
||||
<world-attributes> "Snake Game" >>title
|
||||
[
|
||||
|
|
|
|||
|
|
@ -0,0 +1,73 @@
|
|||
! Copyright (C) 2015 Your name.
|
||||
! See http://factorcode.org/license.txt for BSD license.
|
||||
USING: accessors arrays assocs byte-vectors formatting fry
|
||||
images images.loader kernel locals make math math.vectors
|
||||
opengl.textures sequences ;
|
||||
|
||||
IN: snake-game.sprites
|
||||
|
||||
: new-image-like ( image w h -- image )
|
||||
[ clone ] 2dip
|
||||
[ 2array >>dim ] 2keep *
|
||||
over bytes-per-pixel * <byte-vector> >>bitmap ;
|
||||
|
||||
:: image-part ( image x y w h -- image )
|
||||
image w h new-image-like :> new-image
|
||||
h iota [| i |
|
||||
new-image bitmap>>
|
||||
x y i + w image pixel-row-slice-at
|
||||
append! drop
|
||||
] each new-image ;
|
||||
|
||||
:: generate-sprite-sheet ( image rows cols -- seq )
|
||||
cols rows 2array :> split-dims
|
||||
image dim>> split-dims [ / ] 2map first2 :> ( sw sh )
|
||||
rows iota sh v*n :> ys
|
||||
cols iota sh v*n :> xs
|
||||
ys xs [
|
||||
swap [ image ] 2dip sw sh image-part
|
||||
] cartesian-map f join ;
|
||||
|
||||
: load-sprite-image ( filename -- image )
|
||||
"vocab:snake-game/_resources/%s" sprintf load-image ;
|
||||
|
||||
: make-texture ( image -- texture )
|
||||
{ 0 0 } <texture> ;
|
||||
|
||||
: make-sprites ( filename cols rows -- seq )
|
||||
[ load-sprite-image ] 2dip generate-sprite-sheet
|
||||
[ make-texture ] map ;
|
||||
|
||||
: snake-head-textures ( -- assoc )
|
||||
"head.png" 1 4 make-sprites
|
||||
{ "head-up" "head-right" "head-down" "head-left" }
|
||||
[ swap 2array ] 2map ;
|
||||
|
||||
:: assoc-with-value-like ( assoc key seq -- )
|
||||
key assoc at :> value
|
||||
seq [ [ value ] dip assoc set-at ] each ;
|
||||
|
||||
: snake-body-textures ( -- assoc )
|
||||
"body.png" 3 2 make-sprites
|
||||
{ 1 2 3 4 5 6 }
|
||||
[ swap 2array ] 2map
|
||||
dup 1 { "body-right-up" "body-down-left" } assoc-with-value-like
|
||||
dup 2 { "body-down-right" "body-left-up" } assoc-with-value-like
|
||||
dup 3 { "body-right-right" "body-left-left" } assoc-with-value-like
|
||||
dup 4 { "body-up-up" "body-down-down" } assoc-with-value-like
|
||||
dup 5 { "body-up-right" "body-left-down" } assoc-with-value-like
|
||||
dup 6 { "body-right-down" "body-up-left" } assoc-with-value-like
|
||||
dup [ { 1 2 3 4 5 6 } ] dip [ delete-at ] curry each ;
|
||||
|
||||
: snake-tail-textures ( -- assoc )
|
||||
"tail.png" 2 2 make-sprites
|
||||
{ "tail-down" "tail-left" "tail-up" "tail-right" }
|
||||
[ swap 2array ] 2map ;
|
||||
|
||||
: food-texture ( -- assoc )
|
||||
"food" "food.png" load-sprite-image make-texture
|
||||
2array 1array ;
|
||||
|
||||
: background-texture ( -- assoc )
|
||||
"background" "background.png" load-sprite-image make-texture
|
||||
2array 1array ;
|
||||
|
|
@ -0,0 +1,159 @@
|
|||
! Copyright (C) 2015 Your name.
|
||||
! See http://factorcode.org/license.txt for BSD license.
|
||||
USING: accessors arrays assocs calendar combinators destructors
|
||||
formatting kernel make math namespaces opengl opengl.textures
|
||||
sequences sets snake-game.constants snake-game.game
|
||||
snake-game.input snake-game.util snake-game.sprites timers
|
||||
ui ui.gadgets ui.gadgets.worlds ui.gestures ui.render ;
|
||||
|
||||
FROM: snake-game.util => screen-loc ;
|
||||
FROM: snake-game.util => relative-loc ;
|
||||
|
||||
IN: snake-game.ui
|
||||
|
||||
SYMBOL: game-textures
|
||||
|
||||
TUPLE: snake-gadget < gadget
|
||||
snake-game timer textures ;
|
||||
|
||||
: start-new-game ( snake-gadget -- )
|
||||
<snake-game> >>snake-game drop ;
|
||||
|
||||
: <snake-gadget> ( -- snake-gadget )
|
||||
snake-gadget new
|
||||
[ start-new-game ] keep ;
|
||||
|
||||
: lookup-texture ( key -- texture )
|
||||
game-textures get at ;
|
||||
|
||||
: draw-sprite* ( key screen-loc -- )
|
||||
[ lookup-texture draw-texture ] with-translation ;
|
||||
|
||||
: draw-sprite ( grid-loc key -- )
|
||||
swap screen-loc draw-sprite* ;
|
||||
|
||||
: draw-food ( loc -- )
|
||||
"food" draw-sprite ;
|
||||
|
||||
: draw-background ( -- )
|
||||
{ 0 0 } "background" draw-sprite ;
|
||||
|
||||
: draw-snake-head ( loc facing-dir -- )
|
||||
dup name>> rest "head-" prepend
|
||||
[
|
||||
[ screen-loc ] dip
|
||||
{
|
||||
{ :right [ { -20 -10 } ] }
|
||||
{ :down [ { -10 -20 } ] }
|
||||
{ :up [ { -10 0 } ] }
|
||||
{ :left [ { 0 -10 } ] }
|
||||
} case offset
|
||||
] dip
|
||||
swap draw-sprite* ;
|
||||
|
||||
: draw-snake-body ( loc from-dir to-dir -- )
|
||||
[ name>> rest ] bi@ "body-%s-%s" sprintf draw-sprite ;
|
||||
|
||||
: draw-snake-tail ( loc facing-dir -- )
|
||||
name>> rest "tail-" prepend draw-sprite ;
|
||||
|
||||
: draw-snake-part ( loc from-dir snake-part -- )
|
||||
dup type>> {
|
||||
{ :head [ drop opposite-dir draw-snake-head ] }
|
||||
{ :body [ dir>> draw-snake-body ] }
|
||||
{ :tail [ drop draw-snake-tail ] }
|
||||
} case ;
|
||||
|
||||
: next-snake-loc-from-dir ( loc from-dir snake-part -- new-loc new-from-dir )
|
||||
nip dir>> [ relative-loc ] keep ;
|
||||
|
||||
: draw-snake ( loc from-dir snake -- )
|
||||
3dup [
|
||||
[ draw-snake-part ]
|
||||
[ next-snake-loc-from-dir ] 3bi
|
||||
] each 2drop
|
||||
! make sure to draw the head again
|
||||
first draw-snake-part ;
|
||||
|
||||
: generate-status-message ( snake-game -- str )
|
||||
[ score>> "Score: %d" sprintf ]
|
||||
[
|
||||
{
|
||||
{ [ dup game-over?>> ] [ drop "Game Over" ] }
|
||||
{ [ dup paused?>> ] [ drop "Game Paused" ] }
|
||||
[ drop "Game In Progress" ]
|
||||
} cond
|
||||
]
|
||||
bi 2array " -- " join ;
|
||||
|
||||
: update-status ( gadget -- )
|
||||
[ snake-game>> generate-status-message ] keep show-status ;
|
||||
|
||||
: do-updates ( gadget -- )
|
||||
[ snake-game>> do-game-step ]
|
||||
[ update-status ]
|
||||
[ relayout-1 ]
|
||||
tri ;
|
||||
|
||||
: toggle-game-pause ( snake-gadget -- )
|
||||
snake-game>> [ not ] change-paused? drop ;
|
||||
|
||||
: ?handle-movement-key ( snake-game key -- )
|
||||
key-action
|
||||
[
|
||||
2dup [ snake-dir>> opposite-dir ] dip =
|
||||
[ 2drop ] [ >>next-turn-dir drop ] if
|
||||
] [ drop ] if* ;
|
||||
|
||||
: handle-key ( snake-gadget key -- )
|
||||
{
|
||||
{ [ dup quit-key? ] [ drop close-window ] }
|
||||
{ [ dup pause-key? ] [ drop toggle-game-pause ] }
|
||||
{ [ dup new-game-key? ] [ drop start-new-game ] }
|
||||
[
|
||||
[ snake-game>> ] dip over
|
||||
game-in-progress? [ ?handle-movement-key ] [ 2drop ] if
|
||||
]
|
||||
} cond ;
|
||||
|
||||
: load-game-textures ( snake-gadget -- textures )
|
||||
dup textures>> [ ] [
|
||||
[
|
||||
snake-head-textures %%
|
||||
snake-body-textures %%
|
||||
snake-tail-textures %%
|
||||
food-texture %%
|
||||
background-texture %%
|
||||
] H{ } make >>textures
|
||||
textures>>
|
||||
] ?if ;
|
||||
|
||||
M: snake-gadget graft*
|
||||
[ [ do-updates ] curry 200 milliseconds every ] keep timer<< ;
|
||||
|
||||
M: snake-gadget ungraft*
|
||||
[ stop-timer f ] change-timer
|
||||
dup textures>> values [ dispose ] each
|
||||
f >>textures drop ;
|
||||
|
||||
M: snake-gadget pref-dim*
|
||||
drop snake-game-dim [ snake-game-cell-size * 20 + ] map ;
|
||||
|
||||
M: snake-gadget draw-gadget*
|
||||
[ load-game-textures game-textures ] keep [
|
||||
draw-background
|
||||
{ 10 10 } [
|
||||
snake-game>>
|
||||
[ food-loc>> [ draw-food ] when* ]
|
||||
[
|
||||
[ snake-loc>> ]
|
||||
[ snake-dir>> opposite-dir ]
|
||||
[ snake>> ]
|
||||
tri draw-snake
|
||||
] bi
|
||||
] with-translation
|
||||
] curry with-variable ;
|
||||
|
||||
M: snake-gadget handle-gesture
|
||||
swap dup key-down?
|
||||
[ sym>> handle-key ] [ 2drop ] if f ;
|
||||
|
|
@ -0,0 +1,45 @@
|
|||
! Copyright (C) 2015 Your name.
|
||||
! See http://factorcode.org/license.txt for BSD license.
|
||||
USING: arrays assocs combinators kernel math sequences
|
||||
snake-game.constants ;
|
||||
|
||||
IN: snake-game.util
|
||||
|
||||
: screen-loc ( loc -- loc )
|
||||
[ snake-game-cell-size * ] map ;
|
||||
|
||||
: offset ( loc dim -- loc )
|
||||
[ + ] 2map ;
|
||||
|
||||
: ?roll-over ( x max -- x )
|
||||
{
|
||||
{ [ 2dup >= ] [ 2drop 0 ] }
|
||||
{ [ over neg? ] [ nip 1 - ] }
|
||||
[ drop ]
|
||||
} cond ;
|
||||
|
||||
: ?roll-over-x ( x -- x )
|
||||
snake-game-dim first ?roll-over ;
|
||||
|
||||
: ?roll-over-y ( y -- y )
|
||||
snake-game-dim second ?roll-over ;
|
||||
|
||||
: move ( loc dim -- loc )
|
||||
offset first2
|
||||
[ ?roll-over-x ] [ ?roll-over-y ] bi* 2array ;
|
||||
|
||||
: relative-loc ( loc dir -- loc )
|
||||
{
|
||||
{ :left [ { -1 0 } move ] }
|
||||
{ :right [ { 1 0 } move ] }
|
||||
{ :up [ { 0 -1 } move ] }
|
||||
{ :down [ { 0 1 } move ] }
|
||||
} case ;
|
||||
|
||||
: opposite-dir ( dir -- dir )
|
||||
H{
|
||||
{ :left :right }
|
||||
{ :right :left }
|
||||
{ :up :down }
|
||||
{ :down :up }
|
||||
} at ;
|
||||
Loading…
Reference in New Issue