From 84e7a86e77125e02e9fb9eb159e7d6f3ef4ccbe3 Mon Sep 17 00:00:00 2001
From: Stinkfist0 <stinkfist0@gmail.com>
Date: Sun, 28 Feb 2016 19:51:50 +0200
Subject: [PATCH] XmlSerializer: handle openings. Original author of the
 commit/idea @otsoa.

---
 src/ifcconvert/XmlSerializer.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ifcconvert/XmlSerializer.cpp b/src/ifcconvert/XmlSerializer.cpp
index 9a8cc05d95..83be2a66e5 100644
--- a/src/ifcconvert/XmlSerializer.cpp
+++ b/src/ifcconvert/XmlSerializer.cpp
@@ -164,6 +164,16 @@ void descend(IfcProduct* product, ptree& tree) {
 		}
 	}
 
+    if (product->is(Type::IfcElement)) {
+        IfcElement* element = static_cast<IfcElement*>(product);
+        IfcOpeningElement::list::ptr openings = get_related<IfcElement, IfcRelVoidsElement, IfcOpeningElement>(
+            element, &IfcElement::HasOpenings, &IfcRelVoidsElement::RelatedOpeningElement);
+
+        for (IfcOpeningElement::list::it it = openings->begin(); it != openings->end(); ++it) {
+            descend(*it, child);
+        }
+    }
+
 #ifdef USE_IFC2x3
 	IfcObjectDefinition::list::ptr structures = get_related
 		<IfcProduct, IfcRelDecomposes, IfcObjectDefinition>