X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=altoslib%2FAltosRotation.java;h=e9c447ad1e4d69e355a96b25ab630809878a6fdf;hb=2a4d741872449b5332f28e018fa3acc53ed7d891;hp=ad5aca8f7b7dd4e110368ff0d3ebff9094c22587;hpb=00ae706dab6e8fddef4c5730a17c433a022228b7;p=fw%2Faltos

diff --git a/altoslib/AltosRotation.java b/altoslib/AltosRotation.java
index ad5aca8f..e9c447ad 100644
--- a/altoslib/AltosRotation.java
+++ b/altoslib/AltosRotation.java
@@ -15,9 +15,9 @@
  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  */
 
-package org.altusmetrum.altoslib_5;
+package org.altusmetrum.altoslib_11;
 
-public class AltosRotation {
+public class AltosRotation implements AltosHashable {
 	private AltosQuaternion		rotation;
 
 	public double tilt() {
@@ -28,7 +28,7 @@ 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 +47,22 @@ public class AltosRotation {
 		AltosQuaternion	up = new AltosQuaternion(0, 0, 0, sky);
 		rotation = up.vectors_to_rotation(orient);
 	}
+
+	public AltosHashSet hashSet() {
+		AltosHashSet h = new AltosHashSet();
+
+		h.putHashable("rotation", rotation);
+		return h;
+	}
+
+	public AltosRotation(AltosHashSet h) {
+		rotation = new AltosQuaternion(h.getHash("rotation"));
+	}
+
+	public static AltosRotation fromHashSet(AltosHashSet h, AltosRotation def) {
+		if (h == null)
+			return def;
+
+		return new AltosRotation(h);
+	}
 }