X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosRotation.java;h=1235d86b90e57a1c0da9d3923b2c16db0cd09d0f;hp=411ecbdfae7edd530fc4fd7e1c684499f053b65f;hb=5c4e473ef5d13da9c2f356702cb8767b55aa2137;hpb=97adfff4cfb67c17a96f3ff46606b4e439422b01

diff --git a/altoslib/AltosRotation.java b/altoslib/AltosRotation.java
index 411ecbdf..1235d86b 100644
--- a/altoslib/AltosRotation.java
+++ b/altoslib/AltosRotation.java
@@ -3,7 +3,8 @@
  *
  * 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; version 2 of the License.
+ * the Free Software Foundation; either version 2 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
@@ -17,7 +18,7 @@
 
 package org.altusmetrum.altoslib_11;
 
-public class AltosRotation {
+public class AltosRotation extends AltosQuaternion {
 	private AltosQuaternion		rotation;
 
 	public double tilt() {
@@ -47,4 +48,8 @@ public class AltosRotation {
 		AltosQuaternion	up = new AltosQuaternion(0, 0, 0, sky);
 		rotation = up.vectors_to_rotation(orient);
 	}
+
+	public AltosRotation() {
+		rotation = new AltosQuaternion();
+	}
 }