From dd9bff40a1355cd7dce7d9dd17297ea96ac9ef25 Mon Sep 17 00:00:00 2001
From: rockfool <rockfool10@gmail.com>
Date: Mon, 16 Sep 2019 12:00:47 -0400
Subject: [PATCH] optimize the switch of white boundary

---
 src/particle.cpp | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/src/particle.cpp b/src/particle.cpp
index 6e87691957..bf107a741c 100644
--- a/src/particle.cpp
+++ b/src/particle.cpp
@@ -458,15 +458,11 @@ Particle::cross_surface()
       score_surface_tally(this, model::active_meshsurf_tallies);
       this->r() = r;
     }
-   
-    Direction u;
-    if(surf->bc_ == BC_REFLECT) {
-      // Reflect particle off surface
-      u = surf->reflect(this->r(), this->u());
-    } else if(surf->bc_ == BC_WHITE) {
-      // Diffuse reflect particle off surface
-      u = surf->diffuse_reflect(this->r(), this->u());
-    }
+     
+    Direction u = (surf->bc_ == BC_REFLECT) ?
+      surf->reflect(this->r(), this->u()) :
+      surf->diffuse_reflect(this->r(), this->u());
+    
     // Make sure new particle direction is normalized
     this->u() = u / u.norm();