First reactive example

diff --git a/examples/fran.scm b/examples/fran.scm
new file mode 100644 (file)
index 0000000..b857208
--- /dev/null
+++ b/examples/fran.scm
@@ -0,0 +1,35 @@
+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2016 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/>.
+
+(use-modules (gacela))
+
+
+;;; Reactive positions
+
+(define PI 3.14159265)
+(define (waggle) (cos (* PI (current-time))))
+(define (wiggle) (sin (* PI (current-time))))
+
+
+;;; First example
+
+(define charlotte (importBitmap "charlotte.bmp"))
+(define leftRightCharlotte (moveXY wiggle 0 charlotte))
+(leftRightCharlotte)
+
+(define pat (importBitmap "pat.bmp"))
+(define upDownPat (moveXY 0 waggle pat))
+(upDownPat)