Better examples

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

diff --git a/src/examples/composing-systems.scm b/src/examples/composing-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 composing-systems)
+  #:use-module (gacela system)
+  #:use-module (ice-9 receive))
+
+
+(define s1
+  (make-system '(l)
+    (lambda (e)
+      (sleep 3)
+      (map
+       (lambda (e1)
+        (set-entity-components (car e1) `(l . ,(cons 1 (cdadr e1)))))
+       e))))
+
+(define s2
+  (make-system '(l)
+    (lambda (e)
+      (sleep 4)
+      (map
+       (lambda (e1)
+        (set-entity-components (car e1) `(l . ,(cons 2 (cdadr e1)))))
+       e))))
+
+(define (composing-with-join)
+  (let ((entities '())
+       (components '()))
+    (receive (e c) (modify-entities (list (new-entity '(l . ())) (new-entity '(l . ()))) entities components)
+      ((join-systems s1 s2) e c))))
+
+(export composing-with-join)
+
+
+(define (composing-with-threaded)
+  (let ((entities '())
+       (components '()))
+    (receive (e c) (modify-entities (list (new-entity '(l . ())) (new-entity '(l . ()))) entities components)
+      ((threaded-systems s1 s2) e c))))
+
+(export composing-with-threaded)
+
+
+(define (join-vs-threaded)
+  (let ((entities '())
+       (components '())
+       (t (current-time)))
+    (receive (e c) (modify-entities (list (new-entity '(l . ())) (new-entity '(l . ()))) entities components)
+      (receive (e c) ((join-systems s1 s2) e c)
+       (format #t "~a~%~a~%Time: ~a~%~%" e c (- (current-time) t)))))
+
+  (let ((entities '())
+       (components '())
+       (t (current-time)))
+    (receive (e c) (modify-entities (list (new-entity '(l . ())) (new-entity '(l . ()))) entities components)
+      (receive (e c) ((threaded-systems s1 s2) e c)
+       (format #t "~a~%~a~%Time: ~a~%~%" e c (- (current-time) t))))))
+
+(export join-vs-threaded)