Fix Direction Unit test

LinearAlgebra/src/Direction.cs

@@ -24,15 +24,11 @@ namespace LinearAlgebra {
             horizontal = 0;
             vertical = 0;
         }
-        // public Direction(Angle horizontal, Angle vertical) {
-        //     this.horizontal = horizontal.inDegrees;
-
-        // }
-        // public Direction(float horizontal, float vertical) {
-        //     this.horizontal = horizontal;
-        //     this.vertical = vertical;
-        //     //Normalize();
-        // }
+        public Direction(Angle horizontal, Angle vertical) {
+            this.horizontal = horizontal.inDegrees;
+            this.vertical = vertical.inDegrees;
+            this.Normalize();
+        }
 
         public static Direction Degrees(float horizontal, float vertical) {
             Direction d = new() {
@@ -82,6 +78,33 @@ namespace LinearAlgebra {
             Vector3Float v = new(x, y, z);
             return v;
         }
+
+        public static bool operator ==(Direction d1, Direction d2) {
+            bool horizontalEq = d1.horizontal == d2.horizontal;
+            bool verticalEq = d1.vertical == d2.vertical;
+            return horizontalEq && verticalEq;
+        }
+
+        public static bool operator !=(Direction d1, Direction d2) {
+            bool horizontalNEq = d1.horizontal != d2.horizontal;
+            bool verticalNEq = d1.vertical != d2.vertical;
+            return horizontalNEq || verticalNEq;
+        }
+
+        public override bool Equals(object obj) {
+            if (obj is not Direction d)
+                return false;
+
+            bool horizontalEq = this.horizontal == d.horizontal;
+            bool verticalEq = this.vertical == d.vertical;
+            return horizontalEq && verticalEq;
+        }
+
+        
+        public override int GetHashCode() {
+            return (this.horizontal, this.vertical).GetHashCode();
+        }
+
     }
 
 }

LinearAlgebra/test/DirectionTest.cs

@@ -9,10 +9,12 @@ namespace LinearAlgebra.Test {
 
         [Test]
         public void Compare() {
-            Direction d = Direction.Degrees(45, 135);
+            Direction d1 = Direction.Degrees(45, 135);
+            Direction d2 = new(Angle.Degrees(45), Angle.Degrees(135));
             bool r;
-            r = d == new Direction(Angle.Degrees(45), Angle.Degrees(135));
+            r = d1 == d2;
             Assert.True(r);
+            Assert.AreEqual(d1, d2);
         }
     };
 }

src/Things/TouchSensor.cs

@@ -70,7 +70,7 @@ namespace RoboidControl {
             touchUpdated = false;
             return bytes;
 #else
-            return 0;
+            return Array.Empty<byte>();
 #endif
         }