Add Vector2.randomInCircle()

lib/vector2.js

@@ -1,3 +1,4 @@
+import { Circle } from './index.js'
 import { jitter, random } from './random.js'
 
 export class Vector2 {
@@ -107,7 +108,7 @@ export class Vector2 {
   }
 
   /**
-   *
+   * Returns a random point in the given bounds.
    * @param {number} xMin
    * @param {number} xMax
    * @param {number} yMin
@@ -119,6 +120,18 @@ export class Vector2 {
     return vec2(random(xMin, xMax, rng), random(yMin, yMax, rng));
   }
 
+  /**
+   * Returns a random point within the given circle.
+   * @param {Circle} circle 
+   * @param {import('./random.js').Rng} rng 
+   * @returns {Vector2}
+   */
+  static randomInCircle(circle, rng) {
+    const angle = random(0, Math.PI * 2, rng)
+    const radius = random(0, circle.radius, rng)
+    return circle.center.add(Vector2.fromAngle(angle).scale(radius))
+  }
+
   /**
    * Constructs a Vector2 instance from the given angle, in Radians.
    * @param {Radians} angle