Main loop with recursivity

[gacela.git] / src / gacela.scm

diff --git a/src/gacela.scm b/src/gacela.scm
index cf72902541cd0c521fd79308a7c9917ce1017df4..1a5a0d96fff0662c449c52e356200005b61b3df9 100644 (file)
--- a/src/gacela.scm
+++ b/src/gacela.scm
@@ -18,7 +18,6 @@
 (define-module (gacela gacela)
   #:use-module (gacela events)
   #:use-module (gacela video)
-  #:use-module ((gacela video) #:renamer (symbol-prefix-proc 'video:))
   #:use-module (gacela audio)
   #:use-module (ice-9 optargs)
   #:export (*title*
@@ -34,7 +33,6 @@
            game-loop
            gacela-script
            game-running?
-           set-game-code
            show-mob-hash
            hide-mob-hash
            get-active-mobs
@@ -51,15 +49,13 @@
                   define-mob
                   lambda-mob
                   define-checking-mobs)
-  #:re-export (translate
-              get-frame-time
+  #:re-export (get-frame-time
               3d-mode?))
 
 
 ;;; Main Loop
 
 (define loop-flag #f)
-(define game-code #f)
 (define game-loop-thread #f)
 
 (define-macro (run-in-game-loop proc)
@@ -90,50 +86,43 @@
 (run-in-game-loop resize-screen)
 
 (define-macro (game . code)
-  `(let ((game-function ,(if (null? code)
-                            `(lambda () #f)
-                            `(lambda () ,@code))))
-     (set-game-code game-function)
-     (cond ((not (game-running?))
-           (game-loop)))))
+  (if (null? code)
+      #f
+      `(call-with-new-thread (lambda () ,@code))))
 
 (define (init-gacela)
   (hide-all-mobs)
-  (set-game-code (lambda () #f))
   (cond ((not game-loop-thread)
-        (set! game-loop-thread (call-with-new-thread (lambda () (game))))))
+        (set! game-loop-thread (call-with-new-thread (lambda () (cond ((not (game-running?)) (game-loop))))))))
   (while (not loop-flag))
   #t)
 
 (define (quit-gacela)
   (hide-all-mobs)
-  (set-game-code (lambda () #f))
   (set! game-loop-thread #f)
-  (set! loop-flag #f))
+  (set! loop-flag #f)
+  (quit-video))
 
 (define (game-loop)
   (refresh-active-mobs)
   (init-video *width-screen* *height-screen* *bpp-screen* #:title *title* #:mode *mode* #:fps *frames-per-second*)
   (set! loop-flag #t)
-  (while loop-flag
-        (init-frame-time)
+  (let loop ()
+    (cond (loop-flag
+          (init-frame-time)
 ;          (check-connections)
-        (process-events)
-        (cond ((quit-signal?)
-               (quit-gacela))
-              (else
-               (clear-screen)
-               (to-origin)
-               (refresh-active-mobs)
-               (if (procedure? game-code)
-                   (catch #t
-                          (lambda () (game-code))
-                          (lambda (key . args) #f)))
-               (run-mobs)
-               (draw-bricks)
-               (flip-screen)
-               (delay-frame))))
-  (quit-video))
+          (process-events)
+          (cond ((quit-signal?)
+                 (quit-gacela))
+                (else
+                 (clear-screen)
+                 (to-origin)
+                 (refresh-active-mobs)
+                 (run-mobs)
+                 (run-extensions)
+                 (flip-screen)
+                 (delay-frame)
+                 (loop)))))))
 
 (define (gacela-script args)
   (while loop-flag (sleep 1)))
@@ -141,8 +130,25 @@
 (define (game-running?)
   loop-flag)
 
-(define (set-game-code game-function)
-  (set! game-code game-function))
+
+;;; Extensions to main loop
+
+(define extensions '())
+
+(define (add-extension! proc pri)
+  "Add an extension with a priority to the main loop"
+  (set! extensions
+       (sort (assoc-set! extensions proc pri)
+             (lambda (a b)
+               (< (cdr a) (cdr b))))))
+
+(define (remove-extension! proc)
+  "Remove an extension from the main loop"
+  (set! extensions
+       (assoc-remove! extensions proc)))
+
+(define (run-extensions)
+  (for-each (lambda (x) ((car x))) extensions))
 
 
 ;;; Game Properties
@@ -353,33 +359,6 @@
      ,@body))
 
 
-;;; Bricks Factory
-
-(define active-bricks '())
-
-(define* (draw-bricks #:optional (bricks active-bricks))
-  (cond ((not (null? bricks))
-        ((car bricks))
-        (draw-bricks (cdr bricks)))))
-
-(define (show-brick brick)
-  (set! active-bricks (cons brick active-bricks)))
-
-(define-macro (simple-brick brick-code)
-  (let ((name (gensym)))
-    `(begin
-       (define (,name)
-        ,brick-code)
-       (show-brick ,name)
-       ,name)))
-
-
-;;; Primitive bricks
-
-(define (draw-square . args)
-  (simple-brick (apply video:draw-square args)))
-
-
 (module-map (lambda (sym var)
              (if (not (eq? sym '%module-public-interface))
                  (module-export! (current-module) (list sym))))