X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosRotation.java;h=1235d86b90e57a1c0da9d3923b2c16db0cd09d0f;hp=4e4127cfa7e6c181ac756d72d700de6c424bbede;hb=78b4bf77fca96bef2cce443ad4c9544ae83f0acc;hpb=643c2fb03833d658320f476ef731bbb06fe3cc31

diff --git a/altoslib/AltosRotation.java b/altoslib/AltosRotation.java
index 4e4127cf..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
@@ -15,9 +16,9 @@
  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  */
 
-package org.altusmetrum.altoslib_7;
+package org.altusmetrum.altoslib_11;
 
-public class AltosRotation {
+public class AltosRotation extends AltosQuaternion {
 	private AltosQuaternion		rotation;
 
 	public double tilt() {
@@ -28,7 +29,7 @@ public class AltosRotation {
 	}
 
 	public void rotate(double dt, double x, double y, double z) {
-		AltosQuaternion	rot = AltosQuaternion.half_euler(x * dt, y * dt, z * dt);
+		AltosQuaternion	rot = AltosQuaternion.half_euler(x * dt / 2.0, y * dt / 2.0, z * dt / 2.0);
 		rotation = rot.multiply(rotation).normalize();
 	}
 
@@ -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();
+	}
 }