From 461e3d478aa5836daf2034baae8322196cbd649d Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Mon, 7 Oct 2024 20:45:52 +0200
Subject: [PATCH] Store lowest_z in WKT footprint generation

---
 src/serializers/TtlWktSerializer.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/serializers/TtlWktSerializer.cpp b/src/serializers/TtlWktSerializer.cpp
index 5fa3e0f330..e3a012a54f 100644
--- a/src/serializers/TtlWktSerializer.cpp
+++ b/src/serializers/TtlWktSerializer.cpp
@@ -299,6 +299,7 @@ void TtlWktSerializer::write(const IfcGeom::TriangulationElement* o)
             // @nb we take abs because so that we can ignore face orientation and potential convatities rquire
             if ((std::abs(cross_product.z()) + 1.e-9) >= 1.0 && v0.z() < lowest_z) {
                 lowest_face = f.begin();
+                lowest_z = v0.z();
             }
         }