Extensions for main loop (meshes, controllers, etc)

[gacela.git] / src / gacela.scm

diff --git a/src/gacela.scm b/src/gacela.scm
index 70ac867c2b995108b5ed2a188f043d173c6c84dd..90e85816e0ae17f31df2b3b64142f39b3d143c5b 100644 (file)
--- a/src/gacela.scm
+++ b/src/gacela.scm
@@ -118,7 +118,7 @@
                (to-origin)
                (refresh-active-mobs)
                (run-mobs)
-               (draw-meshes)
+               (run-extensions)
                (flip-screen)
                (delay-frame))))
   (quit-video))
@@ -130,6 +130,26 @@
   loop-flag)
 
 
+;;; 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
 
 (define *title* "Gacela")
@@ -338,18 +358,6 @@
      ,@body))
 
 
-;;; Views Factory
-
-(define default-view (make-hash-table))
-
-(define* (draw-meshes #:optional (meshes (hash-map->list (lambda (k v) v) default-view)))
-  (cond ((not (null? meshes))
-        (catch #t
-                 (lambda () ((car meshes) 'draw))
-                 (lambda (key . args) #f))
-        (draw-meshes (cdr meshes)))))
-
-
 (module-map (lambda (sym var)
              (if (not (eq? sym '%module-public-interface))
                  (module-export! (current-module) (list sym))))