Main loop with recursivity

[gacela.git] / src / gacela.scm

diff --git a/src/gacela.scm b/src/gacela.scm
index 63d6bd3e6992ea3d5703671faf90a699d80c385c..1a5a0d96fff0662c449c52e356200005b61b3df9 100644 (file)
--- a/src/gacela.scm
+++ b/src/gacela.scm
@@ -33,7 +33,6 @@
            game-loop
            gacela-script
            game-running?
-           set-game-code
            show-mob-hash
            hide-mob-hash
            get-active-mobs
@@ -50,15 +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)
@@ -89,49 +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)
-               (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)))
@@ -139,8 +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
@@ -349,3 +357,9 @@
 (define-macro (define-scene name . body)
   `(define (,name)
      ,@body))
+
+
+(module-map (lambda (sym var)
+             (if (not (eq? sym '%module-public-interface))
+                 (module-export! (current-module) (list sym))))
+           (current-module))