From bef1172b44db3844faebc83a5b36f39017da00e5 Mon Sep 17 00:00:00 2001
From: Christopher Lackner <clackner@cerbsim.com>
Date: Mon, 30 Sep 2019 18:50:43 +0200
Subject: [PATCH] only iterate over outer chart if inner chart searchtree

---
 libsrc/stlgeom/stltool.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libsrc/stlgeom/stltool.cpp b/libsrc/stlgeom/stltool.cpp
index b7134357..f1b931ba 100644
--- a/libsrc/stlgeom/stltool.cpp
+++ b/libsrc/stlgeom/stltool.cpp
@@ -829,9 +829,11 @@ STLTrigId STLChart :: ProjectNormal (Point<3> & p3d) const
   double lamtol = 1e-6;
   QuadraticFunction3d quadfun(p3d, GetNormal());
 
+  int starttrig = 1;
   if (inner_searchtree)
     {
       NgArray<STLTrigId> trigs;
+      starttrig = GetNChartT()+1;
       Point<2> p2d = Project2d (p3d);
       inner_searchtree->GetIntersecting(p2d, p2d, trigs);
 
@@ -858,7 +860,7 @@ STLTrigId STLChart :: ProjectNormal (Point<3> & p3d) const
     }
   
   
-  for (int j = 1; j <= nt; j++)
+  for (int j = starttrig; j <= nt; j++)
     {
       STLTrigId i = GetTrig1(j);
       auto & trig = geometry->GetTriangle(i);