1 ! Copyright (C) 2015 Your name.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays assocs calendar combinators destructors
4 formatting kernel make math namespaces opengl opengl.textures
5 sequences sets snake-game.constants snake-game.game
6 snake-game.input snake-game.util snake-game.sprites timers
7 ui ui.gadgets ui.gadgets.worlds ui.gestures ui.render ;
9 FROM: snake-game.util => screen-loc ;
10 FROM: snake-game.util => relative-loc ;
16 TUPLE: snake-gadget < gadget
17 snake-game timer textures ;
19 : start-new-game ( snake-gadget -- )
20 <snake-game> >>snake-game drop ;
22 : <snake-gadget> ( -- snake-gadget )
24 [ start-new-game ] keep ;
26 : lookup-texture ( key -- texture )
27 game-textures get at ;
29 : draw-sprite* ( key screen-loc -- )
30 [ lookup-texture draw-texture ] with-translation ;
32 : draw-sprite ( grid-loc key -- )
33 swap screen-loc draw-sprite* ;
35 : draw-food ( loc -- )
38 : draw-background ( -- )
39 { 0 0 } "background" draw-sprite ;
41 : draw-snake-head ( loc facing-dir -- )
42 dup name>> rest "head-" prepend
46 { :right [ { -20 -10 } ] }
47 { :down [ { -10 -20 } ] }
49 { :left [ { 0 -10 } ] }
54 : draw-snake-body ( loc from-dir to-dir -- )
55 [ name>> rest ] bi@ "body-%s-%s" sprintf draw-sprite ;
57 : draw-snake-tail ( loc facing-dir -- )
58 name>> rest "tail-" prepend draw-sprite ;
60 : draw-snake-part ( loc from-dir snake-part -- )
62 { :head [ drop opposite-dir draw-snake-head ] }
63 { :body [ dir>> draw-snake-body ] }
64 { :tail [ drop draw-snake-tail ] }
67 : next-snake-loc-from-dir ( loc from-dir snake-part -- new-loc new-from-dir )
68 nip dir>> [ relative-loc ] keep ;
70 : draw-snake ( loc from-dir snake -- )
73 [ next-snake-loc-from-dir ] 3bi
75 ! make sure to draw the head again
76 first draw-snake-part ;
78 : generate-status-message ( snake-game -- str )
79 [ score>> "Score: %d" sprintf ]
82 { [ dup game-over?>> ] [ drop "Game Over" ] }
83 { [ dup paused?>> ] [ drop "Game Paused" ] }
84 [ drop "Game In Progress" ]
87 bi 2array " -- " join ;
89 : update-status ( gadget -- )
90 [ snake-game>> generate-status-message ] keep show-status ;
92 : do-updates ( gadget -- )
93 [ snake-game>> do-game-step ]
98 : toggle-game-pause ( snake-gadget -- )
99 snake-game>> [ not ] change-paused? drop ;
101 : ?handle-movement-key ( snake-game key -- )
104 2dup [ snake-dir>> opposite-dir ] dip =
105 [ 2drop ] [ >>next-turn-dir drop ] if
108 : handle-key ( snake-gadget key -- )
110 { [ dup quit-key? ] [ drop close-window ] }
111 { [ dup pause-key? ] [ drop toggle-game-pause ] }
112 { [ dup new-game-key? ] [ drop start-new-game ] }
114 [ snake-game>> ] dip over
115 game-in-progress? [ ?handle-movement-key ] [ 2drop ] if
119 : load-game-textures ( snake-gadget -- textures )
122 snake-head-textures %%
123 snake-body-textures %%
124 snake-tail-textures %%
126 background-texture %%
127 ] H{ } make >>textures
131 M: snake-gadget graft*
132 [ [ do-updates ] curry 200 milliseconds every ] keep timer<< ;
134 M: snake-gadget ungraft*
135 [ stop-timer f ] change-timer
136 dup textures>> values [ dispose ] each
139 M: snake-gadget pref-dim*
140 drop snake-game-dim [ snake-game-cell-size * 20 + ] map ;
142 M: snake-gadget draw-gadget*
143 [ load-game-textures game-textures ] keep [
147 [ food-loc>> [ draw-food ] when* ]
150 [ snake-dir>> opposite-dir ]
155 ] curry with-variable ;
157 M: snake-gadget handle-gesture
159 [ sym>> handle-key ] [ 2drop ] if f ;