update scale calculation for squares with center-to-corner scaling

src/cartographerPointyXY.js

@@ -64,11 +64,11 @@ export default class CartographerPointyXY extends Cartographer {
 	}
 
 	calculateHorizontalScale(pixels, tiles) {
-		return pixels / sqrt2 / (tiles + 1);
+		return pixels / (tiles / 2) / 2;
 	}
 
 	calculateVerticalScale(pixels, tiles) {
-		return pixels / sqrt2 / (tiles + 1);
+		return pixels / (tiles / 2) / 2;
 	}
 
 	tileToPixel(square) {