diff --git a/tools/coordinate.py b/tools/coordinate.py
index 7fce03c..3a8a5cb 100644
--- a/tools/coordinate.py
+++ b/tools/coordinate.py
@@ -1,9 +1,11 @@
 from __future__ import annotations
 from dataclasses import dataclass
 from enum import Enum
-from math import gcd, sqrt, inf, atan2, degrees
+from math import gcd, sqrt, inf, atan2, degrees, floor
 from typing import Union, List, Optional
 
+from tools.math import round_half_up
+
 
 class DistanceAlgorithm(Enum):
     MANHATTAN = 0
@@ -65,8 +67,9 @@ class Coordinate:
         else:
             return minX <= self.x <= maxX and minY <= self.y <= maxY and minZ <= self.z <= maxZ
 
-    def getCircle(self, radius: int = 1, includeDiagonal: bool = True, minX: int = -inf, minY: int = -inf,
-                      maxX: int = inf, maxY: int = inf, minZ: int = -inf, maxZ: int = inf) -> list[Coordinate]:
+    def getCircle(self, radius: int = 1, algorithm: DistanceAlgorithm = DistanceAlgorithm.EUCLIDEAN,
+                  minX: int = -inf, minY: int = -inf, maxX: int = inf, maxY: int = inf,
+                  minZ: int = -inf, maxZ: int = inf) -> list[Coordinate]:
         # FIXME: includeDiagonal == True returns way too few coordinates
         ret = []
         if self.z is None:  # mode 2D
@@ -75,9 +78,10 @@ class Coordinate:
                     target = Coordinate(x, y)
                     if not target.inBoundaries(minX, minY, maxX, maxY):
                         continue
-                    dist = self.getDistanceTo(target, DistanceAlgorithm.MANHATTAN, includeDiagonals=includeDiagonal)
+                    dist = round_half_up(self.getDistanceTo(target, algorithm=algorithm, includeDiagonals=False))
                     if dist == radius:
                         ret.append(target)
+
         else:
             for x in range(self.x - radius * 2, self.x + radius * 2 + 1):
                 for y in range(self.y - radius * 2, self.y + radius * 2 + 1):