diff --git a/src/visibility.rs b/src/visibility.rs
index 43026f4..f385e01 100644
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -88,8 +88,8 @@ impl Viewshed {
         let shape = Collider::cuboid(0.5, 0.5);
         let mut new_visible_entities = HashSet::new();
         let size = (
-            (start.translation.x + self.range as f32) as u32,
-            (start.translation.y + self.range as f32) as u32,
+            (start.translation.x.abs() + self.range as f32) as u32,
+            (start.translation.y.abs() + self.range as f32) as u32,
         );
         let visibility_grid = VisibilityGrid(
             size,