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)
31 (format port "#<view: ~a controllers / ~a meshes>"
32 (length (hash-map->list (lambda x x) (view-controllers record)))
33 (length (hash-map->list (lambda x x) (view-meshes record)))))))
35 (define view? (record-predicate view-type))
36 (define view-id (record-accessor view-type 'id))
37 (define view-controllers (record-accessor view-type 'controllers))
38 (define view-meshes (record-accessor view-type 'meshes))
39 (define (make-view) ((record-constructor view-type) (gensym) (make-hash-table) (make-hash-table)))
42 (define active-views (make-hash-table))
44 (define default-view (make-hash-table))
46 (define* (draw-meshes #:optional (meshes (hash-map->list (lambda (k v) v) default-view)))
47 (cond ((not (null? meshes))
49 (lambda () (mesh-draw (car meshes)))
50 (lambda (key . args) #f))
51 (draw-meshes (cdr meshes)))))
57 (make-record-type "mesh"
58 '(draw translate turn rotate inner-properties inner-property properties properties-set! property property-set!)
60 (format port "#<mesh: ~a" (mesh-inner-property record 'type))
62 (cond (((@ (gacela utils) bound?) (cdr x))
63 (format port " ~a" x))))
64 (mesh-properties record))
68 (define mesh? (record-predicate mesh-type))
70 (define* (make-mesh proc #:optional mesh-type)
72 (record-constructor mesh-type)
73 (let ((px 0) (py 0) (pz 0)
76 (id (gensym)) (type mesh-type)
78 (let ((inner-properties
80 `((id . ,id) (type . ,type) (x . ,px) (y . ,py) (z . ,pz) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
85 (video:rotate ax ay az)
86 (video:translate px py pz)
87 (video:rotate rx ry rz)
109 (assoc-ref (inner-properties) prop-name))
113 (lambda (new-properties)
115 (set! properties new-properties))
118 (assoc-ref properties prop-name))
119 (lambda (prop-name value)
121 (set! properties (assoc-set! properties prop-name value))))))))
123 (define (mesh-draw mesh)
124 (((record-accessor mesh-type 'draw) mesh)))
126 (define (mesh-inner-properties mesh)
127 (((record-accessor mesh-type 'inner-properties) mesh)))
129 (define (mesh-inner-property mesh prop-name)
130 (((record-accessor mesh-type 'inner-property) mesh) prop-name))
132 (define (mesh-properties mesh)
133 (((record-accessor mesh-type 'properties) mesh)))
135 (define (mesh-properties-set! mesh new-properties)
136 (((record-accessor mesh-type 'properties-set!) mesh) new-properties))
138 (define (mesh-property mesh prop-name)
139 (((record-accessor mesh-type 'property) mesh) prop-name))
141 (define (mesh-property-set! mesh prop-name value)
142 (((record-accessor mesh-type 'property-set!) mesh) prop-name value))
144 (define* (show mesh #:optional (view default-view))
145 (let ((id (mesh-inner-property mesh 'id)))
146 (if (not (hash-ref view id))
147 (hash-set! view id mesh))))
149 (define* (hide mesh #:optional (view default-view))
150 (hash-remove! view (mesh-inner-property mesh 'id)))
152 (define* (translate mesh x y #:optional (z 0))
153 (((record-accessor mesh-type 'translate) mesh) x y z)
156 (define (turn mesh . params)
157 (apply ((record-accessor mesh-type 'turn) mesh)
158 (if (>= (length params) 3)
160 (list 0 0 (car params))))
163 (define (rotate mesh . params)
164 (apply ((record-accessor mesh-type 'rotate) mesh)
165 (if (>= (length params) 3)
167 (list 0 0 (car params))))
173 (defmacro* define-primitive (proc #:optional type)
175 (let ((m (make-mesh (lambda (props) (apply ,proc ((@ (gacela utils) arguments-apply) ,proc props))) ,type)))
176 (mesh-properties-set! m ((@ (gacela utils) arguments-calling) ,proc params))
179 (define-macro (define-primitives . symbols)
180 (cond ((null? symbols)
183 (let ((origin (caar symbols))
184 (dest (cadar symbols)))
186 (define ,origin (define-primitive ,dest ',origin))
187 (define-primitives ,@(cdr symbols)))))))
190 (rectangle video:draw-rectangle)
191 (square video:draw-square))
194 (module-map (lambda (sym var)
195 (if (not (eq? sym '%module-public-interface))
196 (module-export! (current-module) (list sym))))
200 ;;; Adding extensions to the main loop
201 (add-extension! draw-meshes 50)