[*] limit tiles in bounds based on width/height/radius

src/cartographerPointyXY.js

@@ -27,6 +27,8 @@ export default class CartographerPointyXY extends Cartographer {
 
 			'tileToPixel',
 			'pixelToTile',
+
+			'inBounds',
 			'boundingBox',
 		].map(method => this[method] = this[method].bind(this));
 	}
@@ -97,6 +99,17 @@ export default class CartographerPointyXY extends Cartographer {
 		return new Square(x, y);
 	}
 
+	inBounds (x, y) {
+		if (this.negativeTiles) {
+			return (!this.width || Math.abs(x) <= Math.floor(this.width / 2))
+				&& (!this.height || Math.abs(y) <= Math.floor(this.height / 2));
+		}
+		else {
+			return (!this.width || (x >= 0 && x < this.width))
+				&& (!this.height || (y >= 0 && y < this.height));
+		}
+	}
+
 	boundingBox(upperLeftPoint, upperRightPoint, lowerLeftPoint, lowerRightPoint) {
 		const upperLeftTile = this.pixelToTile(upperLeftPoint);
 		const lowerRightTile = this.pixelToTile(lowerRightPoint);
@@ -125,7 +138,10 @@ export default class CartographerPointyXY extends Cartographer {
 			// push out by 1 on either end to account for interlocking tiles
 			const rows = rangeInclusive(bottom - 1, top + 1);
 
-			return rows.map(y => new Square(x, y));
+			return rows.map(y => ({x, y}))
+			.reduce((flat, list) => flat.concat(list), [])
+			.filter(({x, y}) => this.inBounds(x, y))
+			.map(({x, y}) => new Square(x, y));
 		});
 	}
 }