wrapping for radial, hexagonal, maps

src/hex.js

@@ -78,7 +78,7 @@ export default class Hex extends Point {
 
 		if (arguments.length === 1) {
 			const {q, r, s = -q - r} = arguments[0];
-			const {x, y, z = -x - y} = arguments[0];
+			const {x, z, y = -x - z} = arguments[0];
 
 			this.x = !isNaN(q) ? q : x;
 			this.y = !isNaN(s) ? s : y;
@@ -152,6 +152,14 @@ export default class Hex extends Point {
 		return this;
 	}
 
+	subtractHex (hex) {
+		this.x -= hex.x;
+		this.y -= hex.y;
+		this.z -= hex.z;
+
+		return this;
+	}
+
 	getAxial () {return {q: this.x, r: this.z};}
 
 	setAxial (newAxial) {
@@ -167,4 +175,8 @@ export default class Hex extends Point {
 		this.y = computeY(this.x, this.z);
 		return this;
 	}
+
+	distance (hex) {
+		return Math.max(Math.abs(this.x - hex.x), Math.abs(this.y - hex.y), Math.abs(this.z - hex.z));
+	}
 }