altoslib: Add null constructors to AltosQuaternion and AltosRotation

These will be used in the reflection-based JSON code

Signed-off-by: Keith Packard <keithp@keithp.com>

2 files changed, 19 insertions, 8 deletions

diff --git a/altoslib/AltosQuaternion.java b/altoslib/AltosQuaternion.java
index 1b4a9419..98c2fe51 100644
--- a/altoslib/AltosQuaternion.java
+++ b/altoslib/AltosQuaternion.java
@@ -115,10 +115,17 @@ public class AltosQuaternion implements AltosJsonable {
 	}
 
 	public AltosQuaternion(AltosQuaternion q) {
-		this.r = q.r;
-		this.x = q.x;
-		this.y = q.y;
-		this.z = q.z;
+		r = q.r;
+		x = q.x;
+		y = q.y;
+		z = q.z;
+	}
+
+	public AltosQuaternion() {
+		r = 1;
+		x = 0;
+		y = 0;
+		z = 0;
 	}
 
 	static public AltosQuaternion vector(double x, double y, double z) {
diff --git a/altoslib/AltosRotation.java b/altoslib/AltosRotation.java
index 321a0f30..6db0b541 100644
--- a/altoslib/AltosRotation.java
+++ b/altoslib/AltosRotation.java
@@ -48,14 +48,18 @@ public class AltosRotation implements AltosJsonable {
 		rotation = up.vectors_to_rotation(orient);
 	}
 
-	public AltosJson json() {
-		return rotation.json();
-	}
-
 	public AltosRotation(AltosJson j) {
 		rotation = new AltosQuaternion(j);
 	}
 
+	public AltosRotation() {
+		rotation = new AltosQuaternion();
+	}
+
+	public AltosJson json() {
+		return rotation.json();
+	}
+
 	public static AltosRotation fromJson(AltosJson j, AltosRotation def) {
 		if (j == null)
 			return def;