Tweak item dropping, add item radius

src/Geometry.hs

@@ -171,7 +171,7 @@ pHalf :: Point2 -> Point2 -> Point2
 pHalf !a !b = 0.5 *.* (a +.+ b)
 -- | Test whether a circle is on a segment by intersecting a new normal segment through the 
 -- center of the circle with the segment itself.
--- Returns False if the circle center is beyond the enpoints of the
+-- Returns False if the circle center is beyond the endpoints of the
 -- segment.
 circOnSegNoEndpoints :: Point2 -> Point2 -> Point2 -> Float -> Bool
 {-# INLINE circOnSegNoEndpoints #-}