main.scm 6.45 KB
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(add-to-load-path "/usr/local/share/guile/site/2.2/")

(use-modules (srfi srfi-1)
             (srfi srfi-9)

             (ice-9 threads)
             (oop goops)

             (sdl2)
             (sdl2 video)
             (sdl2 rect)
             (sdl2 render)
             (sdl2 surface)
             (sdl2 events)
             )

(define-public *unspecified* ((@ (guile) if) #f #f))

(define-syntax set!
  (syntax-rules (=)
    ((_) *unspecified*)

    ((_ field = (op args ...) rest ...)
     (begin ((@ (guile) set!) field (op field args ...))
            (set! rest ...)))

    ((_ field proc)
     ((@ (guile) set!) field proc))

    ((_ field proc rest ...)
     (begin ((@ (guile) set!) field proc) (set! rest ...)))))


(define (parse-map spec)
  (let ((arr (make-array #f (length spec) (string-length (car spec)))))
    (array-index-map! arr
                      (lambda (i j)
                        (case (string-ref (list-ref spec i) j)
                          ((#\space) 'space)
                          ((#\#) 'wall))))
    arr))

(define game-map
  (parse-map
   '("########"
     "#      #"
     "#  ### #"
     "#  #   #"
     "########")))

(define-values (board-height board-width)
  (apply values (array-dimensions game-map)))

(define (cross-product l1 l2)
  (concatenate
   (map (lambda (a)
          (map (lambda (b) (list a b))
               l2))
        l1)))


(define-class <point> ()
  (x #:accessor x
     #:init-keyword #:x
     #:init-value 0)
  (y #:accessor y
     #:init-keyword #:y
     #:init-value 0))

(define (make-point x y)
  (make <point> #:x x #:y y))

(define-class <player> (<point>)
  (angle #:accessor a #:init-value 0))

(define (get-t)
  (define t (gettimeofday))
  (+ (cdr t) (* 1000000 (car t))))


(define current-tile-size (make-parameter 50))
(define current-renderer (make-parameter #f))

(define int (compose inexact->exact floor))

(define (draw-line x1 y1 x2 y2)
  (render-draw-line
   (current-renderer)
   (int (* (current-tile-size) x1)) (int (* (current-tile-size) y1))
   (int (* (current-tile-size) x2)) (int (* (current-tile-size) y2))))

(define (fill-rect x y w h)
 (render-fill-rect
  (current-renderer)
  (make-rect (int (* (current-tile-size) x))
             (int (* (current-tile-size) y))
             (int (* (current-tile-size) w))
             (int (* (current-tile-size) h)))))

(define (draw-line x1 y1 x2 y2)
  (render-draw-line
   (current-renderer)
   (int (* x1 (current-tile-size))) (int (* y1 (current-tile-size)))
   (int (* x2 (current-tile-size))) (int (* y2 (current-tile-size)))))

(define (make-rect* x y w h)
  (make-rect (int (* x (current-tile-size)))
             (int (* y (current-tile-size)))
             (int (* w (current-tile-size)))
             (int (* h (current-tile-size)))))

(define (fill-rects rects)
  (render-fill-rects (current-renderer) rects))

(define* (set-draw-color r g b #:optional (a #xFF))
  (set-render-draw-color (current-renderer) r g b a))

(define (clear)
  (clear-renderer (current-renderer)))

(define (present)
  (present-renderer (current-renderer)))

(define player (make <player> #:x 1 #:y 1 #:a 0))
(define keys-down (make-parameter '()))

(define (update dt)

    (let ((ev (poll-event)))
      (cond #; [(keyboard-event-repeat? ev) #f] ;; TODO implement in bindings
       [(keyboard-down-event? ev)
        (keys-down (cons (keyboard-event-scancode ev)
                         (keys-down)))]
       [(keyboard-up-event? ev)
        (keys-down (delv (keyboard-event-scancode ev)
                         (keys-down)))]))


    (fold (lambda (key ret)
            (case key
              ((x q) 'game-end)
              ;; Det här börjar vara fånigt...
              ((w) (set! (y player) = (- (* dt 0.000003))) ret)
              ((s) (set! (y player) = (+ (* dt 0.000003))) ret)
              ((a) (set! (x player) = (- (* dt 0.000003))) ret)
              ((d) (set! (x player) = (+ (* dt 0.000003))) ret)
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              ((j) (set! (a player) = (- (* dt 0.000003))) ret)
              ((p) (set! (a player) = (+ (* dt 0.000003))) ret)
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              (else ret)
              ))
          #f (keys-down))

  )



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(define (draw-map)
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  (set-draw-color #xFF #xFF #xFF)
  (clear)

  (set-draw-color 0 0 #xFF)

  (fill-rects
   (filter-map
    (lambda (pt)
      (if (eq? 'wall (array-ref game-map (y pt) (x pt)))
          (make-rect* (x pt) (y pt)
                      1 1)
          #f))
    (map (lambda (p) (apply make-point p))
         (cross-product (iota board-width) (iota board-height)))))

  (set-draw-color 0 0 0)

  (for-each (lambda (i) (draw-line
                    0 i
                    board-width i))
            (iota board-height))

  (for-each (lambda (i) (draw-line
                    i 0
                    i board-height))
            (iota board-width))


  (set-draw-color #xFF 0 0)

  (fill-rect
   (- (x player) 0.25)
   (- (y player) 0.25)
   0.5 0.5)

  (set-draw-color 0 #xFF 0)

  (draw-line
   (x player) (y player)
   (+ (cos (a player)) (x player))
   (+ (sin (a player)) (y player)))

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  ;; (present)

)

(define (draw window rend)
  (parameterize ((current-renderer rend))
    (set-draw-color #xFF #xFF #xFF)
    (clear)

    (let ((texture (make-texture rend 'rgba8888 'target
                                   (* 8 (current-tile-size))
                                   (* 5 (current-tile-size)))))
      (set-render-target! rend texture)

      (set-draw-color #xFF #xFF #xFF)

      (draw-map)
      #;
      (parameterize ((current-tile-size 16))
        )

      (set-render-target! rend #f)
      (render-copy rend texture #:dstrect (list 0 0 (* 16 (current-tile-size)) (* 10 (current-tile-size))))
      (render-copy rend texture #:dstrect (list 0 0 (* 2 (current-tile-size)) (* 2 (current-tile-size))))

      (delete-texture! texture)


      )
    (present)
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    ))
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(define (main-loop window)
  (define rend (make-renderer window))

  (define last-t (get-t))

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  (let loop ((counter 0))
    (usleep (int (/ 1000000 (* 60 60))))
    ;; (sigaction SIGINT (lambda (sig) (set! looping #f)))

    (if (= counter 60)
        (begin (draw window rend) (loop 0))
        (begin (let ((dt (let ((t (get-t)))
                           (let ((dt (- t last-t)))
                             (set! last-t t)
                             dt))))
                 (format #t "Δr = ~a~%" dt)
                 (if (update dt)
                     'return
                     (loop (1+ counter))))))))
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(sdl-init)

(call-with-window
    (make-window
     #:title "Wolf 3D"
     #:size '(640 480))
  main-loop)

(sdl-quit)