;;; Gacela, a GNU Guile extension for fast games development
-;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
+;;; Copyright (C) 2013 by Javier Sancho Fernandez <jsf at jsancho dot org>
;;;
;;; This program is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
-;;; Default values for Gacela
-(define *width-screen* 640)
-(define *height-screen* 480)
-(define *bpp-screen* 32)
-(define *frames-per-second* 20)
+(define-module (gacela gacela)
+ #:use-module (gacela system)
+ #:use-module (ice-9 threads)
+ #:use-module (srfi srfi-1)
+ #:export (make-world))
-;;; SDL Initialization Subsystem
-(define init-sdl #f)
-(define quit-sdl #f)
+;;; Entities and components
-(let ((initialized #f))
- (set! init-sdl
- (lambda ()
- (cond ((not initialized) (SDL_Init SDL_INIT_EVERYTHING) (set! initialized #t))
- (else initialized))))
+(define (make-world . entities)
+ (apply make-entity-set entities))
- (set! quit-sdl
- (lambda ()
- (SDL_Quit)
- (set! initialized #f))))
+(define entities-mutex (make-mutex))
+(define game-entities '())
+(define game-components '())
-;;; Video Subsystem
-(define init-video-mode #f)
-(define resize-screen #f)
-(define apply-mode-change #f)
-(define quit-video-mode #f)
+(define (entity . components)
+ (with-mutex entities-mutex
+ (let ((key (gensym)))
+ (set! game-entities
+ (acons key
+ (map (lambda (c) (list (get-component-type c) c)) components)
+ game-entities))
+ (set! game-components (register-components key components))
+ key)))
-(let ((screen #f) (flags 0) (current-width *width-screen*) (current-height *height-screen*) (current-bpp *bpp-screen*))
- (set! init-video-mode
- (lambda* (#:optional (width current-width) (height current-height) (bpp current-bpp))
- (cond ((not screen)
- (init-sdl)
- (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
- (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
- (if (= (assoc-ref (SDL_GetVideoInfo) 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
- (if (= (assoc-ref (SDL_GetVideoInfo) 'blit_hw) 0) 0 SDL_HWACCEL)))
- (set! screen (SDL_SetVideoMode width height bpp flags))
- (init-GL)
- (resize-screen-GL width height)
- (set! current-width width)
- (set! current-height height)
- (set! current-bpp bpp))
- (else #t))))
- (set! resize-screen
- (lambda* (width height #:optional (bpp current-bpp))
- (cond (screen (set! screen (SDL_SetVideoMode width height bpp flags))
- (resize-screen-GL width height)))
- (set! current-width width)
- (set! current-height height)))
+(define* (register-components entity components #:optional (clist game-components))
+ (cond ((null? components) clist)
+ (else
+ (let* ((type (get-component-type (car components)))
+ (elist (assoc-ref clist type)))
+ (register-components entity (cdr components)
+ (assoc-set! clist type
+ (cond (elist
+ (lset-adjoin eq? elist entity))
+ (else
+ (list entity)))))))))
- (set! apply-mode-change
- (lambda () (resize-screen-GL current-width current-height)))
- (set! quit-video-mode
- (lambda () (set! screen #f))))
+(define (get-entity key)
+ (with-mutex entities-mutex
+ (assoc key game-entities)))
-(define (set-2d-mode)
- (cond ((not (3d-mode?))
- (init-video-mode)
- (glDisable GL_DEPTH_TEST)
- (apply-mode-change))))
-(define (set-3d-mode)
- (cond ((3d-mode?)
- (init-video-mode)
- (glClearDepth 1)
- (glEnable GL_DEPTH_TEST)
- (glDepthFunc GL_LEQUAL)
- (apply-mode-change))))
-
-(define (3d-mode?)
- (eq? (assoc-ref (get-game-properties) 'mode) '3d))
-
-(define (init-GL)
- (glShadeModel GL_SMOOTH)
- (glClearColor 0 0 0 0)
-; (glClearDepth 1)
-; (glDepthFunc GL_LEQUAL)
-; (glEnable GL_BLEND)
-; (glBlendFunc GL_SRC_ALPHA GL_ONE)
- (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST)
- #t)
-
-(define (init-lighting)
- (init-video-mode)
- (glEnable GL_LIGHTING))
-
-(define (resize-screen-GL width height)
- (glViewport 0 0 width height)
- (glMatrixMode GL_PROJECTION)
- (glLoadIdentity)
- (cond ((3d-mode?) (let ((ratio (if (= height 0) width (/ width height))))
- (gluPerspective 45 ratio 0.1 100))) ;0.1
- (else (let* ((w (/ width 2)) (h (/ height 2)))
- (glOrtho (- w) w (- h) h 0 1))))
- (glMatrixMode GL_MODELVIEW)
- (glLoadIdentity)
- #t)
-
-(define get-current-color #f)
-(define set-current-color #f)
-
-(let ((current-color '(1 1 1 1)))
- (set! get-current-color
- (lambda ()
- current-color))
-
- (set! set-current-color
- (lambda* (red green blue #:optional (alpha 1))
- (set! current-color (list red green blue alpha))
- (glColor4f red green blue alpha))))
-
-(define* (load-image image-file #:key transparent-color)
- (init-video-mode)
- (let ((loaded-image (IMG_Load image-file)))
- (cond ((= loaded-image 0) #f)
- (else (let ((optimized-image (SDL_DisplayFormat loaded-image)))
- (SDL_FreeSurface loaded-image)
- (cond ((= optimized-image 0) #f)
- ((not transparent-color) optimized-image)
- (else (SDL_SetColorKey optimized-image
- SDL_SRCCOLORKEY
- (SDL_MapRGB (surface-format optimized-image)
- (car transparent-color)
- (cadr transparent-color)
- (caddr transparent-color)))
- optimized-image)))))))
-
-
-;;; Audio Subsystem
-(define init-audio #f)
-(define quit-audio #f)
-
-(let ((audio #f))
- (set! init-audio
- (lambda ()
- (cond ((not audio) (begin (init-sdl) (set! audio (Mix_OpenAudio 22050 MIX_DEFAULT_FORMAT 2 4096))))
- (else audio))))
-
- (set! quit-audio
- (lambda ()
- (Mix_CloseAudio)
- (set! audio #f))))
-
-
-;;; GaCeLa Functions
-(define set-frames-per-second #f)
-(define init-frame-time #f)
-(define delay-frame #f)
-
-(let ((time 0) (time-per-frame (/ 1000.0 *frames-per-second*)))
- (set! set-frames-per-second
- (lambda (fps)
- (set! time-per-frame (/ 1000.0 fps))))
-
- (set! init-frame-time
- (lambda ()
- (set! time (SDL_GetTicks))))
-
- (set! delay-frame
- (lambda ()
- (let ((frame-time (- (SDL_GetTicks) time)))
- (cond ((< frame-time time-per-frame)
- (SDL_Delay (- time-per-frame frame-time))))))))
-
-
-(define set-game-properties #f)
-(define get-game-properties #f)
-
-(let ((ptitle "") (pwidth *width-screen*) (pheight *height-screen*) (pbpp *bpp-screen*) (pfps *frames-per-second*) (pmode '2d))
- (set! set-game-properties
- (lambda* (#:key title width height bpp fps mode)
- (init-video-mode)
- (if title (begin (set! ptitle title) (SDL_WM_SetCaption title "")))
- (if (or width height bpp)
- (begin
- (if width (set! pwidth width))
- (if height (set! pheight height))
- (if bpp (set! pbpp bpp))
- (resize-screen pwidth pheight pbpp)))
- (if fps (begin (set! pfps fps) (set-frames-per-second fps)))
- (if mode (begin (set! pmode mode) (if (eq? mode '3d) (set-3d-mode) (set-2d-mode))))
- (get-game-properties)))
-
- (set! get-game-properties
- (lambda ()
- `((title . ,ptitle) (width . ,pwidth) (height . ,pheight) (bpp . ,pbpp) (fps . ,pfps) (mode . ,pmode)))))
-
-
-(define-macro (run-game . code)
- `(let ((game-function (lambda () (begin ,@code))))
- (init-video-mode)
- (set-game-code game-function)
- (cond ((not (game-running?))
- (game-loop)))))
-
-(define game-loop #f)
-(define game-running? #f)
-(define set-game-code #f)
-
-(let ((running #f) (game-code #f))
- (set! game-loop
- (lambda ()
- (set! running #t)
-; (do () ((quit?))
- (do () (#f)
- (init-frame-time)
-; (check-connections)
-; (eval-from-clients)
-; (process-events)
-; (cond ((not (quit?))
- (cond ((not #f)
- (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
-; (to-origin)
-; (refresh-active-objects)
- (if (procedure? game-code) (game-code))
-; (render-objects)
- (SDL_GL_SwapBuffers)
- (delay-frame))))
- (set! running #f)))
-
- (set! game-running?
- (lambda ()
- running))
-
- (set! set-game-code
- (lambda (game-function)
- (set! game-code game-function))))
-
-(define (quit-game)
-; (free-all-resources)
- (quit-audio)
- (quit-video-mode)
-; (quit-all-mobs)
-; (kill-all-objects)
-; (clear-events)
-; (quit-events)
- (quit-sdl))
+(export entity
+ get-entity)
projects / gacela.git / blobdiff