78 lines
2.1 KiB
Scheme
78 lines
2.1 KiB
Scheme
(import (scheme base)
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(scheme inexact)
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(hoot ffi)
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(hoot debug)
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(dom canvas)
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(dom document)
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(dom element)
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(dom event)
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(dom image)
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(dom media)
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(dom window)
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(console))
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(define game-width 640.0)
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(define game-height 480.0)
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(define canvas (get-element-by-id "canvas"))
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(define context (get-context canvas "2d"))
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(define *element-x* (/ game-width 2.0))
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;; Draw
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(define (draw prev-time)
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(clear-rect context 0.0 0.0 game-width game-height)
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(set-fill-color! context "#140c1c")
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(set-text-align! context "center")
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(set-font! context "bold 24px monospace")
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(fill-text context "Hello, World! :)" *element-x* (/ game-height 2.0))
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(request-animation-frame draw-callback))
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(define draw-callback (procedure->external draw))
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(set-element-width! canvas (exact game-width))
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(set-element-height! canvas (exact game-height))
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(request-animation-frame draw-callback)
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(dprint "game-height" game-height)
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(console-log canvas)
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;; Input
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(define key:left "ArrowLeft")
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(define key:right "ArrowRight")
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(define (on-key-down event)
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(let ((key (keyboard-event-code event)))
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(cond
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((string=? key key:left)
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(dprint "key:" key)
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(set! *element-x* (- *element-x* 10)))
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((string=? key key:right)
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(dprint "key:" key)
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(set! *element-x* (+ *element-x* 10))))))
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(add-event-listener! (current-document) "keydown"
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(procedure->external on-key-down))
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(define-record-type <gelement-type>
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(make-gelement-type interact? image)
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gelement-type?
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(interact? gelement-interact?)
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(image gelement-type-iamge))
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(define-record-type <gelement>
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(make-gelement type content)
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gelement?
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(type gelement-type)
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(content gelement-content set-gelement-content!))
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(define wall (make-gelement (make-gelement-type #f "wall") #nil))
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(define apple (make-gelement (make-gelement-type #t "apple") #nil))
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(define ppp (vector (vector apple wall wall apple wall)
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(vector wall wall wall wall wall)
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(vector apple wall wall wall wall)
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(vector wall wall wall wall wall)
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(vector wall wall wall wall wall)))
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