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diff --git a/src/geometry.cpp b/src/geometry.cpp
index cfb0511..41928aa 100644
--- a/src/geometry.cpp
+++ b/src/geometry.cpp
@@ -62,15 +62,15 @@ double Geometry::ParameterOfLineAndPoint(Point tail, Point head, Point point)
 }
 
 
-Point Geometry::MirrorPointAroundLine(Point point, Point p1, Point p2)
+Point Geometry::MirrorPointAroundLine(Point point, Point tail, Point head)
 {
 	// Get the vector of the intersection of the line and the normal on the
 	// line to the point in question.
-	double t = ParameterOfLineAndPoint(p1, p2, point);
-	Vector v = Vector(p1, p2) * t;
+	double t = ParameterOfLineAndPoint(tail, head, point);
+	Vector v = Vector(tail, head) * t;
 
-	// Get the point normal to point to the line passed in (p2 is the tail)
-	Point normalOnLine = p2 + v;
+	// Get the point normal to point to the line passed in
+	Point normalOnLine = tail + v;
 
 	// Make our mirrored vector (head - tail)
 	Vector mirror = -(point - normalOnLine);