altoslib: Store saved state in version-independent format

[fw/altos] / altoslib / AltosRotation.java

diff --git a/altoslib/AltosRotation.java b/altoslib/AltosRotation.java
index 411ecbdfae7edd530fc4fd7e1c684499f053b65f..e9c447ad1e4d69e355a96b25ab630809878a6fdf 100644 (file)
--- a/altoslib/AltosRotation.java
+++ b/altoslib/AltosRotation.java
@@ -17,7 +17,7 @@
 
 package org.altusmetrum.altoslib_11;
 
-public class AltosRotation {
+public class AltosRotation implements AltosHashable {
        private AltosQuaternion         rotation;
 
        public double tilt() {
@@ -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);
+       }
 }