X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=gacela.lisp;h=dcbddde6836162300ffa5a89af9c8512c9da1975;hb=31db8863bd1281f94f426aac5936fb897351362f;hp=617ad3ccd76185f18473dd2bc489962601917fe4;hpb=b4bb1b1a7180f521bceb564003d906308f93b5b7;p=gacela.git

diff --git a/gacela.lisp b/gacela.lisp
index 617ad3c..dcbddde 100644
--- a/gacela.lisp
+++ b/gacela.lisp
@@ -22,10 +22,9 @@
 (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)
@@ -89,16 +88,24 @@
 
 
 (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)
   (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST)
   t)
 
+(defmacro progn-textures (&body code)
+  `(let (values)
+     (init-video-mode)
+     (glEnable GL_TEXTURE_2D)
+     (setq values (multiple-value-list (progn ,@code)))
+     (glDisable GL_TEXTURE_2D)
+     (apply #'values values)))
+
 (defun init-textures ()
   (init-video-mode)
   (glEnable GL_TEXTURE_2D))
@@ -109,16 +116,24 @@
 
 (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))
 
+(let ((current-color '(1 1 1 1)))
+  (defun get-color ()
+    current-color)
+
+  (defun set-color (red green blue (&optional (alpha 1)))
+    (setq current-color color)
+    (glColor4f red green blue alpha)))
+
 (defun copy-surface (source)
   (cond ((surface-p source)
 	 (let ((new-surface
@@ -185,32 +200,6 @@
   (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)
 
@@ -349,18 +338,32 @@
 					     (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))))