1 ;;; Gacela, a GNU Guile extension for fast games development
2 ;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
4 ;;; This program is free software: you can redistribute it and/or modify
5 ;;; it under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation, either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; This program is distributed in the hope that it will be useful,
10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ;;; GNU General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
18 (define-module (gacela gacela)
19 #:use-module (gacela events)
20 #:use-module (gacela video)
21 #:use-module (gacela audio)
22 #:use-module (ice-9 optargs)
52 #:re-export (translate
60 (define game-loop-thread #f)
62 (define-macro (run-in-game-loop proc)
63 (let ((pgl (string->symbol (string-concatenate (list (symbol->string proc) "-in-game-loop"))))
64 (flag-symbol (gensym))
65 (value-symbol (gensym)))
68 (define (,proc . param)
69 (cond ((and game-loop-thread (not (eq? game-loop-thread (current-thread))))
70 (let ((,flag-symbol #f))
71 (define ,value-symbol)
75 (lambda () (set! ,value-symbol (apply ,pgl param)))
76 (lambda (key . args) #f))
77 (set! ,flag-symbol #t))
79 (while (not ,flag-symbol))
82 (apply ,pgl param)))))))
84 (run-in-game-loop load-texture)
85 (run-in-game-loop load-font)
86 (run-in-game-loop set-screen-bpp!)
87 (run-in-game-loop resize-screen)
89 (define-macro (game . code)
92 `(call-with-new-thread (lambda () ,@code))))
96 (cond ((not game-loop-thread)
97 (set! game-loop-thread (call-with-new-thread (lambda () (cond ((not (game-running?)) (game-loop))))))))
98 (while (not loop-flag))
101 (define (quit-gacela)
103 (set! game-loop-thread #f)
107 (refresh-active-mobs)
108 (init-video *width-screen* *height-screen* *bpp-screen* #:title *title* #:mode *mode* #:fps *frames-per-second*)
112 ; (check-connections)
114 (cond ((quit-signal?)
119 (refresh-active-mobs)
126 (define (gacela-script args)
127 (while loop-flag (sleep 1)))
129 (define (game-running?)
133 ;;; Extensions to main loop
135 (define extensions '())
137 (define (add-extension! proc pri)
138 "Add an extension with a priority to the main loop"
140 (sort (assoc-set! extensions proc pri)
142 (< (cdr a) (cdr b))))))
144 (define (remove-extension! proc)
145 "Remove an extension from the main loop"
147 (assoc-remove! extensions proc)))
149 (define (run-extensions)
150 (for-each (lambda (x) ((car x))) extensions))
155 (define *title* "Gacela")
156 (define *width-screen* 640)
157 (define *height-screen* 480)
158 (define *bpp-screen* 32)
159 (define *frames-per-second* 20)
161 (define *fullscreen* 'off)
163 (define* (set-game-properties! #:key title width height bpp fps mode fullscreen)
165 (set-screen-title! title))
167 (set-screen-bpp! bpp))
168 (if (or width height)
170 (if (not width) (set! width (get-screen-width)))
171 (if (not height) (set! height (get-screen-height)))
172 (resize-screen width height)))
174 (set-frames-per-second! fps))
176 (if (eq? mode '3d) (set-3d-mode) (set-2d-mode)))
178 (set-fullscreen! fullscreen))
179 (get-game-properties))
181 (define (get-game-properties)
182 `((title . ,(get-screen-title)) (width . ,(get-screen-width)) (height . ,(get-screen-height)) (bpp . ,(get-screen-bpp)) (fps . ,(get-frames-per-second)) (mode . ,(if (3d-mode?) '3d '2d)) (fullscreen . ,(get-fullscreen))))
187 (define mobs-table (make-hash-table))
188 (define active-mobs '())
189 (define mobs-changed #f)
191 (define (show-mob-hash mob)
192 (hash-set! mobs-table (mob 'get-mob-id) mob)
193 (set! mobs-changed #t))
195 (define (hide-mob-hash mob-id)
196 (hash-remove! mobs-table mob-id)
197 (set! mobs-changed #t))
199 (define (refresh-active-mobs)
201 (set! mobs-changed #f)
202 (set! active-mobs (hash-map->list (lambda (k v) v) mobs-table)))))
204 (define (get-active-mobs)
207 (define (hide-all-mobs)
208 (set! mobs-changed #t)
209 (hash-clear! mobs-table))
211 (define (mobs-changed?)
215 (define-macro (show-mob mob)
220 `(show-mob-hash (lambda* (#:optional (option #f)) (,mob option))))))
222 (define-macro (hide-mob mob)
225 (hide-mob-hash (m 'get-mob-id))))
227 `(hide-mob-hash (,mob 'get-mob-id)))))
229 (define current-mob-id #f)
231 (define translate-mob translate)
233 (define (get-current-mob-id)
236 (define* (run-mobs #:optional (mobs (get-active-mobs)))
237 (let ((sorted-mobs (sort mobs (lambda (m1 m2) (< (m1 'get-z-index) (m2 'get-z-index))))))
240 (set! current-mob-id (m 'get-mob-id))
241 (glmatrix-block (m)))
243 (set! current-mob-id #f)))
248 (define mob-functions (make-hash-table))
250 (define (get-mob-function-name mob-name)
251 (let ((name (hash-ref mob-functions mob-name)))
254 (hash-set! mob-functions mob-name name)))
257 (define-macro (the-mob mob-name init-data)
258 `(let ((mob-id (gensym))
261 (mob-data ,init-data)
262 (saved-data ,init-data))
263 (lambda* (#:optional (option #f))
265 (let ((time (get-frame-time)))
266 (cond ((not (= time mob-time))
268 (set! saved-data mob-data)))))
275 (procedure-name ,mob-name))
280 (cond ((keyword? option)
281 (assoc-ref saved-data (keyword->symbol option)))
284 (let ((res (,mob-name mob-id mob-data)))
285 (set! mob-z-index (car res))
286 (set! mob-data (cadr res))))))))))
288 (define-macro (define-mob-function attr . body)
289 (let ((attr (map (lambda (a) (if (list? a) a (list a #f))) attr))
290 (mob-id-symbol (gensym))
291 (mob-id-z-index (gensym))
292 (data-symbol (gensym)))
293 `(lambda (,mob-id-symbol ,data-symbol)
294 (let ((,mob-id-z-index 0))
296 (hide-mob-hash ,mob-id-symbol))
297 (define* (translate x y #:optional (z 0))
299 (translate-mob x y z))
301 (set! ,mob-id-z-index (+ ,mob-id-z-index z))
302 (translate-mob x y))))
306 `(let ((val (assoc-ref ,data-symbol ',(car a))))
307 (cond (val (set! ,(car a) val)))))
311 (lambda (key . args) #f))
312 (list ,mob-id-z-index (list ,@(map (lambda (a) `(cons ',(car a) ,(car a))) attr))))))))
314 (define-macro (define-mob mob-head . body)
315 (let* ((name (car mob-head))
316 (attr (cdr mob-head))
317 (make-fun-symbol (gensym))
318 (mob-fun-symbol (gensym))
319 (params-symbol (gensym)))
320 `(define (,name . ,params-symbol)
321 (define ,make-fun-symbol
322 (lambda* ,(if (null? attr) '() `(#:key ,@attr))
323 (the-mob ,name (list ,@(map (lambda (a) `(cons ',(car a) ,(car a))) attr)))))
324 (define ,mob-fun-symbol
325 (define-mob-function ,attr ,@body))
326 (cond ((or (null? ,params-symbol) (keyword? (car ,params-symbol)))
327 (apply ,make-fun-symbol ,params-symbol))
329 (apply ,mob-fun-symbol ,params-symbol))))))
331 (define-macro (lambda-mob attr . body)
332 (let ((fun-name (gensym)))
334 (define-mob-function ,(cons fun-name attr) ,@body)
335 (the-mob 'undefined '() ,fun-name))))
338 ;;; Functions for checking mobs (collisions and more)
340 (define (map-mobs fun type)
341 (let ((mobs (filter (lambda (m) (and (eq? (m 'get-type) type) (not (eq? (m 'get-mob-id) (get-current-mob-id))))) (get-active-mobs))))
342 (map (lambda (m) (fun (m 'get-data))) mobs)))
344 (define-macro (define-checking-mobs head mob-def . body)
345 (let ((type (car mob-def)) (attr (cdr mob-def)))
349 (let ,(map (lambda (a) `(,(car a) (assoc-ref m ',(cadr a)))) attr)
356 (define-macro (define-scene name . body)
361 (module-map (lambda (sym var)
362 (if (not (eq? sym '%module-public-interface))
363 (module-export! (current-module) (list sym))))