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|
#!/bin/sh
#| -*- scheme -*-
exec csi -R r7rs -ss "$0" "$@"
|#
#+chicken (import r7rs)
(import (scheme base)
(scheme write)
(chicken io)
(chicken port)
(srfi 133)
(yolk common)
(yolk xterm)
(yolk erase)
(yolk cursor)
(matchable)
(stty))
(define (draw . instructions)
(for-each (lambda (i)
(cond
((string? i)
(display i))
((list? i)
(apply draw i))))
instructions))
(define me
(string-append "@" (cursor-left 1)))
(define rock
(string-append "o" (cursor-left 1)))
(define blank
(string-append " " (cursor-left 1)))
(define WIDTH
(make-parameter 80))
(define HEIGHT
(make-parameter 24))
(define WORLD
(make-vector (* (WIDTH) (HEIGHT)) 0))
(define (get-position x y)
(if (or (> x (WIDTH))
(< x 0)
(> y (HEIGHT))
(< y 0))
#f
(vector-ref WORLD (+ y (* (WIDTH) x)))))
(define (set-position! x y thing)
(if (or (> x (WIDTH))
(< x 0)
(> y (HEIGHT))
(< y 0))
(error "Out of bounds" (list (WIDTH) (HEIGHT)) (list x y))
(vector-set! WORLD (+ y (* (WIDTH) x)) thing)))
(define X
(make-parameter (/ (WIDTH) 2)))
(define Y
(make-parameter (/ (HEIGHT) 2)))
(define (move-up)
(unless (<= (Y) 2)
(draw blank (cursor-up 1) me)
(Y (- (Y) 1))))
(define (move-left)
(unless (<= (X) 2)
(draw blank (cursor-left 1) me)
(X (- (X) 1))))
(define (move-right)
(unless (>= (X) (- (WIDTH) 1))
(draw blank (cursor-right 1) me)
(X (+ (X) 1))))
(define (move-down)
(unless (>= (Y) (- (HEIGHT) 1))
(draw blank (cursor-down 1) me)
(Y (+ (Y) 1))))
(define (game-setup)
(stty '(raw (not echo)))
(set-buffering-mode! (current-input-port) #:none 1)
(set-buffering-mode! (current-output-port) #:none 1)
;; Set up screen
(draw alt-buffer-enable
erase-screen
(cursor-save)
invisible-cursor)
;; Draw borders
(draw cursor-home
"/"
(list->string
(let loop ((c 1)
(acc '()))
(if (>= c (- (WIDTH) 1))
acc
(loop (+ 1 c)
(cons #\- acc)))))
"\\"
(let loop ((r 2)
(acc '()))
(if (>= r (HEIGHT))
acc
(loop (+ 1 r)
(append `(,(cursor-move 0 r)
"|"
,(cursor-move (WIDTH) r)
"|")
acc))))
(cursor-move 1 (HEIGHT))
"\\"
(list->string
(let loop ((c 1)
(acc '()))
(if (>= c (- (WIDTH) 1))
acc
(loop (+ 1 c)
(cons #\- acc)))))
"/")
;; Draw character
(draw (cursor-move (X) (Y))
me))
(define (game-cleanup)
(stty '(cooked echo))
(draw cursor-home
(cursor-restore)
alt-buffer-disable
visible-cursor))
(define (readch)
(integer->char (read-byte)))
(define (car* x)
(and (pair? x)
(car x)))
(define (game-loop)
(let loop ((c (readch)))
(if (eq? c 'done)
#t
(let ((done? #f))
(match c
((or #\q #\) (set! done? #t))
(#\h (move-left))
(#\j (move-down))
(#\k (move-up))
(#\l (move-right))
;; Escape characters
(#\escape
(match (readch)
(#\[ (match (readch)
(#\A (move-up))
(#\B (move-down))
(#\C (move-right))
(#\D (move-left))
(else)))
(else)))
(else))
(loop (if done? 'done (readch)))))))
(define (main args)
(dynamic-wind
game-setup
game-loop
game-cleanup)
#t)
|
