Better examples

[gacela.git] / src / examples / making-systems.scm

diff --git a/src/examples/making-systems.scm b/src/examples/making-systems.scm
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+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2013 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/>.
+
+
+(define-module (gacela examples making-systems)
+  #:use-module (gacela system)
+  #:use-module (ice-9 receive))
+
+
+(define-component a x y)
+
+(define (making-systems)
+  (let ((entities '())
+       (components '()))
+    (receive (e c) (((make-system '() (lambda (e) (list (new-entity (make-a 1 2)) (new-entity (make-a 10 20))))) entities components))
+            (set! entities e)
+            (set! components c))
+    (format #t "Two new entities with a:~%~a~%~a~%~%" entities components)
+
+    (((make-system '(a) (lambda (e) (display e) (newline) '())) entities components))))
+
+(export making-systems)