X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;ds=sidebyside;f=gacela.lisp;h=4dc430aef63b9f913855670747173f63f45bb6b1;hb=357aa6f62c04d59385ac4e44a5303d0825aa81ba;hp=aea2df64dba8740354591c7a2f061ebf239f969c;hpb=e75e6a11d356f3220d14ef9dc77d8e5810c41ce1;p=gacela.git

diff --git a/gacela.lisp b/gacela.lisp
index aea2df6..4dc430a 100644
--- a/gacela.lisp
+++ b/gacela.lisp
@@ -22,7 +22,8 @@
 (defvar *height-screen* 480)
 (defvar *bpp-screen* 32)
 (defvar *title-screen* "Happy Hacking!!")
-(defvar *gacela-freq* 30)
+(defvar *frames-per-second* 30)
+;(defvar *gacela-freq* 100)
 (defvar *transparent-color* '(:red 0 :green 0 :blue 0))
 (defvar *background-color* '(:red 0 :green 0 :blue 0))
 
@@ -349,16 +350,20 @@
 		     (run-com running)))))))
 
 (defmacro run-game (title &body code)
-  `(progn
+  `(let ((fpstemp (make-timer)))
      (init-video-mode)
      (SDL_WM_SetCaption ,title "")
      (process-events)
      (do () ((quit?))
+	 (start-timer fpstemp)
 	 (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
 	 (glLoadIdentity)
 	 ,@code
 	 (SDL_GL_SwapBuffers)
-	 (SDL_Delay (- *gacela-freq* (rem (SDL_GetTicks) *gacela-freq*)))
+	 (let ((frame-time (get-time fpstemp)) (time-per-frame (/ 1000.0 *frames-per-second*)))
+	   (cond ((< frame-time time-per-frame)
+		  (SDL_Delay (- time-per-frame frame-time)))))
+;	 (SDL_Delay (- *gacela-freq* (rem (SDL_GetTicks) *gacela-freq*)))
 	 (process-events)
 	 (setq running nil))))