-;;; Gacela, a GNU Guile extension for fast games development
-;;; Copyright (C) 2009 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
-;;; the Free Software Foundation, either version 3 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-;;; Mobs Factory
-
-(define show-mob-hash #f)
-(define hide-mob-hash #f)
-(define refresh-active-mobs #f)
-(define get-active-mobs #f)
-(define hide-all-mobs #f)
-(define mobs-changed? #f)
-
-(let ((mobs-table (make-hash-table))
- (active-mobs '())
- (changed #f))
-
- (set! show-mob-hash
- (lambda (mob)
- (hash-set! mobs-table (mob 'get-mob-id) mob)
- (set! changed #t)))
-
- (set! hide-mob-hash
- (lambda (mob-id)
- (hash-remove! mobs-table mob-id)
- (set! changed #t)))
-
- (set! refresh-active-mobs
- (lambda ()
- (cond (changed
- (set! changed #f)
- (set! active-mobs (hash-map->list (lambda (k v) v) mobs-table))))))
-
- (set! get-active-mobs
- (lambda () active-mobs))
-
- (set! hide-all-mobs
- (lambda ()
- (set! changed #t)
- (hash-clear! mobs-table)))
-
- (set! mobs-changed?
- (lambda () changed)))
-
-
-(define-macro (show-mob mob)
- (cond ((list? mob)
- `(let ((m ,mob))
- (show-mob-hash m)))
- (else
- `(show-mob-hash (lambda* (#:optional (option #f)) (,mob option))))))
-
-(define-macro (hide-mob mob)
- (cond ((list? mob)
- `(let ((m ,mob))
- (hide-mob-hash (m 'get-mob-id))))
- (else
- `(hide-mob-hash (,mob 'get-mob-id)))))
-
-(define* (run-mobs #:optional (mobs (get-active-mobs)))
- (for-each
- (lambda (m)
- (glPushMatrix)
- (m)
- (glPopMatrix))
- mobs))
-
-
-;;; Making mobs
-
-(define-macro (define-mob mob-head . body)
- (let ((name (car mob-head)) (attr (cdr mob-head)))
- `(define ,(string->symbol (string-concatenate (list "make-" (symbol->string name))))
- (lambda* ,(if (null? attr) '() `(#:key ,@attr))
- (the-mob ',name () ,attr ,@body)))))
-
-(define-macro (the-mob type attr publish . body)
- (let ((mob-id-symbol (gensym))
- (type-symbol (gensym))
- (time-symbol (gensym))
- (data-symbol (gensym)))
- `(let ((,mob-id-symbol (gensym))
- (,type-symbol ,type)
- (,time-symbol 0)
- (,data-symbol '())
- ,@attr)
- (lambda* (#:optional (option #f))
- (define (kill-me)
- (hide-mob-hash ,mob-id-symbol))
- (define (save-data)
- (let ((time (get-frame-time)))
- (cond ((not (= time ,time-symbol))
- (set! ,time-symbol time)
- (set! ,data-symbol ,(cons 'list (map (lambda (x) `(cons ',(car x) ,(car x))) publish)))))))
- (define (get-data)
- ,data-symbol)
- (define (filter-mobs type fun)
- #t)
- (define (map-mobs fun type)
- (let ((mobs (filter (lambda (m) (and (eq? (m 'get-type) type) (not (eq? (m 'get-mob-id) ,mob-id-symbol)))) (get-active-mobs))))
- (map (lambda (m) (fun (m 'get-data))) mobs)))
- (case option
- ((get-mob-id)
- ,mob-id-symbol)
- ((get-type)
- ,type-symbol)
- ((get-data)
- (save-data)
- ,data-symbol)
- (else
- (save-data)
- (catch #t
- (lambda () ,@body)
- (lambda (key . args) #f))))))))
-
-(define-macro (lambda-mob attr . body)
- `(the-mob 'undefined ,attr '() ,@body))
-
-
-;;; Collisions
-
-(define-macro (lambda-mob-data attr . body)
- `(lambda ,attr ,@body))
-
-(define-macro (define-collision-check name mobs . body)
- `(defmacro* ,name (#:optional m)
- `(let ,(cond (m `((mob-id (,m 'get-mob-id)) (mob-type (,m 'get-type))))
- (else `()))
-
- mob-id)))