From 57c581e4b5444c4c14e1374788a184dec95b081e Mon Sep 17 00:00:00 2001
From: Patrick Shriwise <pshriwise@gmail.com>
Date: Fri, 7 Jun 2019 13:17:17 -0500
Subject: [PATCH] Update direction on reflection and use a different call to
 reset instersections.

---
 src/surface.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/surface.cpp b/src/surface.cpp
index 83ee218cb0..69da679574 100644
--- a/src/surface.cpp
+++ b/src/surface.cpp
@@ -267,8 +267,9 @@ Direction DAGSurface::normal(Position r) const
 
 Direction DAGSurface::reflect(Position r, Direction u) const
 {
-  history.rollback_last_intersection();
-  return Surface::reflect(r, u);
+  history.reset_to_last_intersection();
+  last_dir = Surface::reflect(r, u);
+  return last_dir;
 }
 
 BoundingBox DAGSurface::bounding_box() const