! Copyright (C) 2015 Sankaranarayanan Viswanathan.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs calendar combinators destructors
-formatting kernel make math math.vectors namespaces opengl
-opengl.textures sequences sets snake-game.game
-snake-game.sprites timers ui ui.gadgets ui.gadgets.worlds
-ui.gestures ui.render ;
+USING: accessors assocs calendar combinators
+combinators.short-circuit destructors formatting fry kernel math
+math.vectors namespaces opengl opengl.textures sequences sets
+snake-game.game snake-game.sprites timers ui ui.gadgets
+ui.gadgets.worlds ui.gestures ui.render ;
IN: snake-game.ui
: draw-snake-head ( loc facing-dir -- )
dup name>> rest "head-" prepend [
- [ game-loc>screen-loc ] dip
- {
+ [ game-loc>screen-loc ] dip {
{ :right [ { -20 -10 } ] }
{ :down [ { -10 -20 } ] }
{ :up [ { -10 0 } ] }
! make sure to draw the head again
first draw-snake-part ;
-: generate-status-message ( snake-game -- str )
+: game-status ( snake-game -- str )
[ score>> ]
[
{
] bi "Score: %d -- %s" sprintf ;
: update-status ( gadget -- )
- [ snake-game>> generate-status-message ] keep show-status ;
+ [ snake-game>> game-status ] keep show-status ;
: do-updates ( gadget -- )
[ snake-game>> do-game-step ]
: toggle-game-pause ( snake-gadget -- )
snake-game>> [ not ] change-paused? 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* ;
-
-: 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 ;
+ dup textures>> [ ] [ snake-textures >>textures textures>> ] ?if ;
M: snake-gadget graft*
- [ [ do-updates ] curry 200 milliseconds every ] keep timer<< ;
+ [ '[ _ do-updates ] 200 milliseconds every ] keep timer<< ;
M: snake-gadget ungraft*
[ stop-timer f ] change-timer
drop snake-game-dim [ snake-game-cell-size * 20 + ] map ;
M: snake-gadget draw-gadget*
- [ load-game-textures game-textures ] keep [
+ [ load-game-textures game-textures ] keep '[
draw-background
{ 10 10 } [
- snake-game>>
+ _ snake-game>>
[ food-loc>> [ draw-food ] when* ]
[
[ snake-loc>> ]
tri draw-snake
] bi
] with-translation
- ] curry with-variable ;
+ ] with-variable ;
+
+: key-dir ( key -- dir )
+ 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? ;
M: snake-gadget handle-gesture
- swap dup key-down?
- [ sym>> handle-key ] [ 2drop ] if f ;
+ swap dup key-down? [
+ sym>> {
+ { [ dup quit-key? ] [ drop close-window ] }
+ { [ dup pause-key? ] [ drop toggle-game-pause ] }
+ { [ dup new-game-key? ] [ drop start-new-game ] }
+ [
+ key-dir [
+ swap snake-game>> dup {
+ [ game-in-progress? ]
+ [ snake-dir>> opposite-dir pick = not ]
+ } 1&& [ next-turn-dir<< ] [ 2drop ] if
+ ] [ drop ] if*
+ ]
+ } cond
+ ] [ 2drop ] if f ;