(defvar *height-screen* 480)
(defvar *bpp-screen* 32)
(defvar *title-screen* "Happy Hacking!!")
-(defvar *gacela-freq* 30)
+(defvar *frames-per-second* 20)
(defvar *transparent-color* '(:red 0 :green 0 :blue 0))
(defvar *background-color* '(:red 0 :green 0 :blue 0))
(eval (read-from-string (concatenate 'string "(progn " (car comlst) ")")))))))
(run-com running)))))))
+(let ((gacela-timer (make-timer)))
+ (defun start-gacela-timer () (start-timer gacela-timer))
+ (defun get-gacela-time () (get-time gacela-timer)))
+
(defmacro run-game (title &body code)
`(progn
(init-video-mode)
(SDL_WM_SetCaption ,title "")
(process-events)
(do () ((quit?))
+ (start-gacela-timer)
(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-gacela-time)) (time-per-frame (/ 1000.0 *frames-per-second*)))
+ (cond ((< frame-time time-per-frame)
+ (SDL_Delay (- time-per-frame frame-time)))))
(process-events)
(setq running nil))))