From 889d3c5451dd0fef2437f73daa56ba6ea2aaf5c3 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sun, 21 Jul 2024 11:53:42 +0200
Subject: [PATCH] Don't fail on tapered extrusion over non-derived profile def
 #5046

---
 src/ifcgeom/mapping/IfcExtrudedAreaSolidTapered.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ifcgeom/mapping/IfcExtrudedAreaSolidTapered.cpp b/src/ifcgeom/mapping/IfcExtrudedAreaSolidTapered.cpp
index b33894a4b6..45ad6c3009 100644
--- a/src/ifcgeom/mapping/IfcExtrudedAreaSolidTapered.cpp
+++ b/src/ifcgeom/mapping/IfcExtrudedAreaSolidTapered.cpp
@@ -42,6 +42,9 @@ taxonomy::ptr mapping::map_impl(const IfcSchema::IfcExtrudedAreaSolidTapered* in
 		taxonomy::cast<taxonomy::face>(map(inst->EndSweptArea()))
 	};
 
+	if (!loft->children.back()->matrix) {
+		loft->children.back()->matrix = taxonomy::make<taxonomy::matrix4>();
+	}
 	auto old = loft->children.back()->matrix->ccomponents();
 	loft->children.back()->matrix->components() = old * end_profile;