Fixes circular SAT

geometry/polygon.ts

@@ -33,7 +33,14 @@ export class Polygon {
     return center;
   }
 
-  get circularHitbox(): CircleLike {
+  _circularBoundingBox?: CircleLike;
+
+  get circularBoundingBox(): CircleLike {
+    this._circularBoundingBox = this.calculateCircularBoundingBox();
+    return this._circularBoundingBox;
+  }
+
+  private calculateCircularBoundingBox() {
     let greatestDistance = 0;
     for (const p of this.points) {
       greatestDistance = Math.max(
@@ -50,13 +57,11 @@ export class Polygon {
 
   _aabb?: axisAlignedBoundingBox;
   get AABB(): axisAlignedBoundingBox {
-    if (!this._aabb) {
-      this._aabb = this.recalculateAABB();
-    }
+    this._aabb = this.recalculateAABB();
     return this._aabb;
   }
 
-  recalculateAABB(): axisAlignedBoundingBox {
+  private recalculateAABB(): axisAlignedBoundingBox {
     let smallestX, biggestX, smallestY, biggestY;
     smallestX =
       smallestY =
@@ -74,8 +79,8 @@ export class Polygon {
     }
 
     return {
-      x: smallestX,
-      y: smallestY,
+      x: smallestX + this.center.x,
+      y: smallestY + this.center.y,
       w: biggestX - smallestX,
       h: biggestY - smallestY,
     };
@@ -118,6 +123,6 @@ export class Polygon {
     for (const point of this.points) {
       if (p.dist(point) < p.dist(nearest)) nearest = point;
     }
-    return nearest;
+    return nearest.copy().add(this.center);
   }
 }