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 (get-frame-time
59 (define game-loop-thread #f)
61 (define-macro (run-in-game-loop proc)
62 (let ((pgl (string->symbol (string-concatenate (list (symbol->string proc) "-in-game-loop"))))
63 (flag-symbol (gensym))
64 (value-symbol (gensym)))
67 (define (,proc . param)
68 (cond ((and game-loop-thread (not (eq? game-loop-thread (current-thread))))
69 (let ((,flag-symbol #f))
70 (define ,value-symbol)
74 (lambda () (set! ,value-symbol (apply ,pgl param)))
75 (lambda (key . args) #f))
76 (set! ,flag-symbol #t))
78 (while (not ,flag-symbol))
81 (apply ,pgl param)))))))
83 (run-in-game-loop load-texture)
84 (run-in-game-loop load-font)
85 (run-in-game-loop set-screen-bpp!)
86 (run-in-game-loop resize-screen)
88 (define-macro (game . code)
91 `(call-with-new-thread (lambda () ,@code))))
95 (cond ((not game-loop-thread)
96 (set! game-loop-thread (call-with-new-thread (lambda () (cond ((not (game-running?)) (game-loop))))))))
97 (while (not loop-flag))
100 (define (quit-gacela)
102 (set! game-loop-thread #f)
106 (refresh-active-mobs)
107 (init-video *width-screen* *height-screen* *bpp-screen* #:title *title* #:mode *mode* #:fps *frames-per-second*)
111 ; (check-connections)
113 (cond ((quit-signal?)
118 (refresh-active-mobs)
125 (define (gacela-script args)
126 (while loop-flag (sleep 1)))
128 (define (game-running?)
132 ;;; Extensions to main loop
134 (define extensions '())
136 (define (add-extension! proc pri)
137 "Add an extension with a priority to the main loop"
139 (sort (assoc-set! extensions proc pri)
141 (< (cdr a) (cdr b))))))
143 (define (remove-extension! proc)
144 "Remove an extension from the main loop"
146 (assoc-remove! extensions proc)))
148 (define (run-extensions)
149 (for-each (lambda (x) ((car x))) extensions))
154 (define *title* "Gacela")
155 (define *width-screen* 640)
156 (define *height-screen* 480)
157 (define *bpp-screen* 32)
158 (define *frames-per-second* 20)
160 (define *fullscreen* 'off)
162 (define* (set-game-properties! #:key title width height bpp fps mode fullscreen)
164 (set-screen-title! title))
166 (set-screen-bpp! bpp))
167 (if (or width height)
169 (if (not width) (set! width (get-screen-width)))
170 (if (not height) (set! height (get-screen-height)))
171 (resize-screen width height)))
173 (set-frames-per-second! fps))
175 (if (eq? mode '3d) (set-3d-mode) (set-2d-mode)))
177 (set-fullscreen! fullscreen))
178 (get-game-properties))
180 (define (get-game-properties)
181 `((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))))
186 (define mobs-table (make-hash-table))
187 (define active-mobs '())
188 (define mobs-changed #f)
190 (define (show-mob-hash mob)
191 (hash-set! mobs-table (mob 'get-mob-id) mob)
192 (set! mobs-changed #t))
194 (define (hide-mob-hash mob-id)
195 (hash-remove! mobs-table mob-id)
196 (set! mobs-changed #t))
198 (define (refresh-active-mobs)
200 (set! mobs-changed #f)
201 (set! active-mobs (hash-map->list (lambda (k v) v) mobs-table)))))
203 (define (get-active-mobs)
206 (define (hide-all-mobs)
207 (set! mobs-changed #t)
208 (hash-clear! mobs-table))
210 (define (mobs-changed?)
214 (define-macro (show-mob mob)
219 `(show-mob-hash (lambda* (#:optional (option #f)) (,mob option))))))
221 (define-macro (hide-mob mob)
224 (hide-mob-hash (m 'get-mob-id))))
226 `(hide-mob-hash (,mob 'get-mob-id)))))
228 (define current-mob-id #f)
230 (define translate-mob translate)
232 (define (get-current-mob-id)
235 (define* (run-mobs #:optional (mobs (get-active-mobs)))
236 (let ((sorted-mobs (sort mobs (lambda (m1 m2) (< (m1 'get-z-index) (m2 'get-z-index))))))
239 (set! current-mob-id (m 'get-mob-id))
240 (glmatrix-block (m)))
242 (set! current-mob-id #f)))
247 (define mob-functions (make-hash-table))
249 (define (get-mob-function-name mob-name)
250 (let ((name (hash-ref mob-functions mob-name)))
253 (hash-set! mob-functions mob-name name)))
256 (define-macro (the-mob mob-name init-data)
257 `(let ((mob-id (gensym))
260 (mob-data ,init-data)
261 (saved-data ,init-data))
262 (lambda* (#:optional (option #f))
264 (let ((time (get-frame-time)))
265 (cond ((not (= time mob-time))
267 (set! saved-data mob-data)))))
274 (procedure-name ,mob-name))
279 (cond ((keyword? option)
280 (assoc-ref saved-data (keyword->symbol option)))
283 (let ((res (,mob-name mob-id mob-data)))
284 (set! mob-z-index (car res))
285 (set! mob-data (cadr res))))))))))
287 (define-macro (define-mob-function attr . body)
288 (let ((attr (map (lambda (a) (if (list? a) a (list a #f))) attr))
289 (mob-id-symbol (gensym))
290 (mob-id-z-index (gensym))
291 (data-symbol (gensym)))
292 `(lambda (,mob-id-symbol ,data-symbol)
293 (let ((,mob-id-z-index 0))
295 (hide-mob-hash ,mob-id-symbol))
296 (define* (translate x y #:optional (z 0))
298 (translate-mob x y z))
300 (set! ,mob-id-z-index (+ ,mob-id-z-index z))
301 (translate-mob x y))))
305 `(let ((val (assoc-ref ,data-symbol ',(car a))))
306 (cond (val (set! ,(car a) val)))))
310 (lambda (key . args) #f))
311 (list ,mob-id-z-index (list ,@(map (lambda (a) `(cons ',(car a) ,(car a))) attr))))))))
313 (define-macro (define-mob mob-head . body)
314 (let* ((name (car mob-head))
315 (attr (cdr mob-head))
316 (make-fun-symbol (gensym))
317 (mob-fun-symbol (gensym))
318 (params-symbol (gensym)))
319 `(define (,name . ,params-symbol)
320 (define ,make-fun-symbol
321 (lambda* ,(if (null? attr) '() `(#:key ,@attr))
322 (the-mob ,name (list ,@(map (lambda (a) `(cons ',(car a) ,(car a))) attr)))))
323 (define ,mob-fun-symbol
324 (define-mob-function ,attr ,@body))
325 (cond ((or (null? ,params-symbol) (keyword? (car ,params-symbol)))
326 (apply ,make-fun-symbol ,params-symbol))
328 (apply ,mob-fun-symbol ,params-symbol))))))
330 (define-macro (lambda-mob attr . body)
331 (let ((fun-name (gensym)))
333 (define-mob-function ,(cons fun-name attr) ,@body)
334 (the-mob 'undefined '() ,fun-name))))
337 ;;; Functions for checking mobs (collisions and more)
339 (define (map-mobs fun type)
340 (let ((mobs (filter (lambda (m) (and (eq? (m 'get-type) type) (not (eq? (m 'get-mob-id) (get-current-mob-id))))) (get-active-mobs))))
341 (map (lambda (m) (fun (m 'get-data))) mobs)))
343 (define-macro (define-checking-mobs head mob-def . body)
344 (let ((type (car mob-def)) (attr (cdr mob-def)))
348 (let ,(map (lambda (a) `(,(car a) (assoc-ref m ',(cadr a)))) attr)
355 (define-macro (define-scene name . body)
360 (module-map (lambda (sym var)
361 (if (not (eq? sym '%module-public-interface))
362 (module-export! (current-module) (list sym))))