From 5714bd1ec47850be0427f722f55acc1eb6076bd6 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Wed, 7 Jun 2023 08:43:08 +0200
Subject: [PATCH] take into account edge orientation correctly #3201

---
 src/ifcgeom/kernels/opencascade/loop.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/ifcgeom/kernels/opencascade/loop.cpp b/src/ifcgeom/kernels/opencascade/loop.cpp
index e87a4d14c5..64f3f74a92 100644
--- a/src/ifcgeom/kernels/opencascade/loop.cpp
+++ b/src/ifcgeom/kernels/opencascade/loop.cpp
@@ -275,9 +275,16 @@ bool OpenCascadeKernel::convert(const taxonomy::loop::ptr loop, TopoDS_Wire& wir
 				V1.Normalize();
 				V2.Normalize();
 
-				auto ang = std::acos(V1.Dot(V2));
+				V2.Reverse();
 
-				Logger::Notice(std::to_string(ang));
+				if (edges.First().Orientation() == TopAbs_REVERSED) {
+					V1.Reverse();
+				}
+				if (edges.Last().Orientation() == TopAbs_REVERSED) {
+					V2.Reverse();
+				}
+
+				auto ang = std::acos(V1.Dot(V2));
 
 				if (ang < 0.0314) {
 					edges_to_tesselate.Add(crv1->DynamicType() == STANDARD_TYPE(Geom_Circle) ? edges.First() : edges.Last());