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 views)
19 #:use-module (gacela gacela)
20 #:use-module ((gacela video) #:renamer (symbol-prefix-proc 'video:))
21 #:use-module ((gacela gl) #:select (glPushMatrix glPopMatrix))
22 #:use-module (ice-9 optargs))
28 (make-record-type "view"
29 '(id controllers meshes priority)
31 (format port "#<view: ~a meshes>"
32 (length (view-meshes record))))))
34 (define (make-view controllers meshes priority) ((record-constructor view-type) (gensym) controllers meshes priority))
35 (define view? (record-predicate view-type))
36 (define view-id (record-accessor view-type 'id))
37 (define view-meshes (record-accessor view-type 'meshes))
38 (define view-meshes-set! (record-modifier view-type 'meshes))
39 (define view-controllers (record-accessor view-type 'controllers))
40 (define view-controllers-set! (record-modifier view-type 'controllers))
41 (define view-priority (record-accessor view-type 'priority))
43 (defmacro* view (#:key (priority 0) . elements)
44 `(let ((e (view-elements ,@elements)))
45 (make-view (car e) (cadr e) ,priority)))
47 (define-macro (view-elements . elements)
48 (cond ((null? elements) `'(() ()))
50 `(let ((l (view-elements ,@(cdr elements))))
51 ,(let ((e (car elements)))
53 (list (car l) (cons ,e (cadr l))))
55 (list (cons ,(if (list? e) e `(lambda () (,e))) (car l))
59 (define (controllers-list list controllers)
60 (cond ((null? controllers)
62 ((list? (car controllers))
63 (assoc-set! (controllers-list list (cdr controllers)) (caar controllers) (cadar controllers)))
65 (assoc-set! (controllers-list list (cdr controllers)) (gensym) (car controllers)))))
67 (define activated-views '())
69 (define (sort-views views-alist)
72 (< (view-priority (cdr v1)) (view-priority (cdr v2))))))
74 (define (activate-view view)
76 (sort-views (assoc-set! activated-views (view-id view) view)))
79 (define (view-actived? view)
80 (and (assoc (view-id view) activated-views) #t))
82 (define (view-priority-set! view priority)
83 ((record-modifier view-type 'priority) view priority)
84 (if (view-actived? view)
85 (set! activated-views (sort-views activated-views))))
87 (define current-view #f)
89 (define* (run-views #:optional (views activated-views))
90 (cond ((not (null? views))
91 (set! current-view (cdar views))
92 ;((view-body current-view))
93 (draw-meshes (view-meshes current-view))
94 (run-views (cdr views)))))
96 (define (draw-meshes meshes)
97 (cond ((not (null? meshes))
99 (lambda () (mesh-draw (cdar meshes)))
100 (lambda (key . args) #f))
101 (draw-meshes (cdr meshes)))))
104 ;(define default-view (activate-view (make-view (lambda () #f))))
110 (make-record-type "mesh"
111 '(draw translate turn rotate inner-properties inner-property properties properties-set! property property-set!)
112 (lambda (record port)
113 (format port "#<mesh: ~a" (mesh-inner-property record 'type))
114 (for-each (lambda (x)
115 (cond (((@ (gacela utils) bound?) (cdr x))
116 (format port " ~a" x))))
117 (mesh-properties record))
118 (display ">" port))))
120 (define mesh? (record-predicate mesh-type))
122 (define* (make-mesh proc #:optional type)
124 (record-constructor mesh-type)
125 (let ((px 0) (py 0) (pz 0)
130 (let ((inner-properties
132 `((id . ,id) (type . ,type) (x . ,px) (y . ,py) (z . ,pz) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
136 (video:glmatrix-block
137 (video:rotate ax ay az)
138 (video:translate px py pz)
139 (video:rotate rx ry rz)
161 (assoc-ref (inner-properties) prop-name))
165 (lambda (new-properties)
167 (set! properties new-properties))
170 (assoc-ref properties prop-name))
171 (lambda (prop-name value)
173 (set! properties (assoc-set! properties prop-name value))))))))
175 (define (mesh-draw mesh)
176 (((record-accessor mesh-type 'draw) mesh)))
178 (define (mesh-inner-properties mesh)
179 (((record-accessor mesh-type 'inner-properties) mesh)))
181 (define (mesh-inner-property mesh prop-name)
182 (((record-accessor mesh-type 'inner-property) mesh) prop-name))
184 (define (mesh-properties mesh)
185 (((record-accessor mesh-type 'properties) mesh)))
187 (define (mesh-properties-set! mesh new-properties)
188 (((record-accessor mesh-type 'properties-set!) mesh) new-properties))
190 (define (mesh-property mesh prop-name)
191 (((record-accessor mesh-type 'property) mesh) prop-name))
193 (define (mesh-property-set! mesh prop-name value)
194 (((record-accessor mesh-type 'property-set!) mesh) prop-name value))
196 (define* (show mesh #:optional (view current-view))
197 (let ((id (mesh-inner-property mesh 'id))
198 (table (view-meshes view)))
199 (if (not (assoc-ref table id))
200 (view-meshes-set! view (assoc-set! table id mesh))))
203 (define* (hide mesh #:optional (view current-view))
204 (let ((id (mesh-inner-property mesh 'id))
205 (table (view-meshes view)))
206 (if (assoc-ref table id)
207 (view-meshes-set! view (assoc-remove! table id))))
210 (define* (translate mesh x y #:optional (z 0))
211 (((record-accessor mesh-type 'translate) mesh) x y z)
214 (define (turn mesh . params)
215 (apply ((record-accessor mesh-type 'turn) mesh)
216 (if (>= (length params) 3)
218 (list 0 0 (car params))))
221 (define (rotate mesh . params)
222 (apply ((record-accessor mesh-type 'rotate) mesh)
223 (if (>= (length params) 3)
225 (list 0 0 (car params))))
231 (defmacro* define-primitive (proc #:optional type)
233 (let ((m (make-mesh (lambda (props) (apply ,proc ((@ (gacela utils) arguments-apply) ,proc props))) ,type)))
234 (mesh-properties-set! m ((@ (gacela utils) arguments-calling) ,proc params))
237 (define-macro (define-primitives . symbols)
238 (cond ((null? symbols)
241 (let ((origin (caar symbols))
242 (dest (cadar symbols)))
244 (define ,origin (define-primitive ,dest ',origin))
245 (define-primitives ,@(cdr symbols)))))))
248 (rectangle video:draw-rectangle)
249 (square video:draw-square))
252 ;;; Adding extensions to the main loop
253 (add-extension! run-views 10)
256 (module-map (lambda (sym var)
257 (if (not (eq? sym '%module-public-interface))
258 (module-export! (current-module) (list sym))))