(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))
-(defvar *zoom* -10)
;;; SDL Initialization Subsystem
(let (initialized)
(defun init-GL ()
+ (2d-mode)
(glShadeModel GL_SMOOTH)
(glClearColor 0 0 0 0)
(glClearDepth 1)
- (glEnable GL_DEPTH_TEST)
(glDepthFunc GL_LEQUAL)
; (glEnable GL_BLEND)
; (glBlendFunc GL_SRC_ALPHA GL_ONE)
(defun resize-screen-GL (width height)
(let ((ratio (if (= height 0) width (/ width height))))
- (glViewPort 0 0 width height)
+; (glViewPort 0 0 width height)
(glMatrixMode GL_PROJECTION)
(glLoadIdentity)
(let* ((w (/ width 2)) (-w (neg w)) (h (/ height 2)) (-h (neg h)))
(glOrtho -w w -h h 0 1))
- (gluPerspective 45 ratio 0.1 100)
+; (gluPerspective 45 ratio 0.1 100)
(glMatrixMode GL_MODELVIEW)
(glLoadIdentity)
t))
(flip))
-(defun filled-circle (radius &optional (color '(:red 255 :green 255 :blue 255)))
- (init-video-mode)
- (let ((new-surface (create-surface (1+ (* radius 2)) (1+ (* radius 2)))))
- (sge_FilledCircle (surface-address new-surface)
- radius radius radius
- (getf color :red)
- (getf color :green)
- (getf color :blue))
- (setf (surface-shape new-surface)
- `((,radius ,radius) ,radius))
- new-surface))
-
-
-(defun filled-rect (width height &optional (color '(:red 255 :green 255 :blue 255)))
- (init-video-mode)
- (let ((new-surface (create-surface width height)))
- (sge_FilledRect (surface-address new-surface)
- 0 0 width height
- (getf color :red)
- (getf color :green)
- (getf color :blue))
- (setf (surface-shape new-surface)
- (make-rectangle 0 0 width height))
- new-surface))
-
-
;;; TTF Subsystem
(defstruct font address)
(eval (read-from-string (concatenate 'string "(progn " (car comlst) ")")))))))
(run-com running)))))))
+(let (time (time-per-frame (/ 1000.0 *frames-per-second*)))
+ (defun set-frames-per-second (fps)
+ (setq time-per-frame (/ 1000.0 fps)))
+
+ (defun init-frame-time ()
+ (setq time (SDL_GetTicks)))
+
+ (defun delay-frame ()
+ (let ((frame-time (- (SDL_GetTicks) time)))
+ (cond ((< frame-time time-per-frame)
+ (SDL_Delay (- time-per-frame frame-time)))))))
+
+
(defmacro run-game (title &body code)
`(progn
(init-video-mode)
(SDL_WM_SetCaption ,title "")
+ (init-frame-time)
(process-events)
(do () ((quit?))
(glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
(glLoadIdentity)
- (translate 0 0 *zoom*)
,@code
(SDL_GL_SwapBuffers)
- (SDL_Delay (- *gacela-freq* (rem (SDL_GetTicks) *gacela-freq*)))
+ (delay-frame)
+ (init-frame-time)
(process-events)
(setq running nil))))