From c704ae5ac18ebd6d79cf2f1c62e12d271cd994f6 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Wed, 13 Jan 2021 14:50:30 -0600
Subject: [PATCH] Avoid calling std::abs and divsd instruction in
 CSGCell::distance

---
 src/cell.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cell.cpp b/src/cell.cpp
index 6ca39749fd..418258d8b2 100644
--- a/src/cell.cpp
+++ b/src/cell.cpp
@@ -514,7 +514,7 @@ CSGCell::distance(Position r, Direction u, int32_t on_surface, Particle* p) cons
 
     // Check if this distance is the new minimum.
     if (d < min_dist) {
-      if (std::abs(d - min_dist) / min_dist >= FP_PRECISION) {
+      if (min_dist - d >= FP_PRECISION*min_dist) {
         min_dist = d;
         i_surf = -token;
       }