chore: convenience

packages/entity/src/traits/positioned.js

@@ -121,6 +121,8 @@ export default () => class Positioned extends decorate(Trait) {
   methods() {
     return {
 
+      distanceFrom: (other) => Vector.distance(this.entity.position, other.position),
+
       pointAround: (radius, angle) => {
         if (!this.entity.is('Positioned')) {
           return [0, 0];