diff --git a/src/ifcgeom/IfcRegister.cpp b/src/ifcgeom/IfcRegister.cpp
new file mode 100644
index 0000000000..ace2835a46
--- /dev/null
+++ b/src/ifcgeom/IfcRegister.cpp
@@ -0,0 +1,56 @@
+/********************************************************************************
+*                                                                              *
+* This file is part of IfcOpenShell.                                           *
+*                                                                              *
+* IfcOpenShell is free software: you can redistribute it and/or modify         *
+* it under the terms of the Lesser GNU General Public License as published by  *
+* the Free Software Foundation, either version 3.0 of the License, or          *
+* (at your option) any later version.                                          *
+*                                                                              *
+* IfcOpenShell is distributed in the hope that it will be useful,              *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+* Lesser GNU General Public License for more details.                          *
+*                                                                              *
+* You should have received a copy of the Lesser GNU General Public License     *
+* along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+*                                                                              *
+********************************************************************************/
+
+#include "IfcGeom.h"
+
+namespace IfcGeom {
+	namespace Cache {
+		std::map<int,TopoDS_Shape> Shape;
+		void PurgeShapeCache() {
+			Shape.clear();
+		}
+	}
+}
+
+using namespace Ifc2x3;
+using namespace IfcUtil;
+
+bool IfcGeom::convert_shape(const SHARED_PTR<IfcBaseClass>& l, TopoDS_Shape& r) {
+	const unsigned int id = l->entity->id();
+	std::map<int,TopoDS_Shape>::const_iterator it = Cache::Shape.find(id);
+	if ( it != Cache::Shape.end() ) { r = it->second; return true; }
+#include "IfcRegisterConvertShape.h"
+	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	return false;
+}
+bool IfcGeom::convert_wire(const SHARED_PTR<IfcBaseClass>& l, TopoDS_Wire& r) {
+#include "IfcRegisterConvertWire.h"
+	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	return false;
+}
+bool IfcGeom::convert_face(const SHARED_PTR<IfcBaseClass>& l, TopoDS_Face& r) {
+#include "IfcRegisterConvertFace.h"
+	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	return false;
+}
+bool IfcGeom::convert_curve(const SHARED_PTR<IfcBaseClass>& l, Handle(Geom_Curve)& r) {
+#include "IfcRegisterConvertCurve.h"
+	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	return false;
+}
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