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diff --git a/include/drawinglayer/primitive3d/groupprimitive3d.hxx b/include/drawinglayer/primitive3d/groupprimitive3d.hxx
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+++ b/include/drawinglayer/primitive3d/groupprimitive3d.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE3D_GROUPPRIMITIVE3D_HXX
+#define INCLUDED_DRAWINGLAYER_PRIMITIVE3D_GROUPPRIMITIVE3D_HXX
+
+#include <drawinglayer/drawinglayerdllapi.h>
+
+#include <drawinglayer/primitive3d/baseprimitive3d.hxx>
+
+
+namespace drawinglayer::primitive3d
+    {
+        /** GroupPrimitive3D class
+
+            Baseclass for all grouping 3D primitives
+
+            The description/functionality is identical with the 2D case in groupprimitive2d.hxx,
+            please see there for detailed information.
+
+            Current Basic 3D StatePrimitives are:
+
+            - ModifiedColorPrimitive3D (for a stack of color modifications)
+            - ShadowPrimitive3D (for 3D objects with shadow; this is a special case
+              since the shadow of a 3D primitive is a 2D primitive set)
+            - TexturePrimitive3D (with the following variations)
+                - GradientTexturePrimitive3D (for 3D gradient fill)
+                - BitmapTexturePrimitive3D (for 3D Bitmap fill)
+                - TransparenceTexturePrimitive3D (for 3D transparence)
+                - HatchTexturePrimitive3D (for 3D hatch fill)
+            - TransformPrimitive3D (for a transformation stack)
+         */
+        class DRAWINGLAYER_DLLPUBLIC GroupPrimitive3D : public BasePrimitive3D
+        {
+        private:
+            /// the children. Declared private since this shall never be changed at all after construction
+            Primitive3DContainer                             maChildren;
+
+        public:
+            /// constructor
+            explicit GroupPrimitive3D(const Primitive3DContainer& rChildren);
+
+            /// data read access
+            const Primitive3DContainer& getChildren() const { return maChildren; }
+
+            /// compare operator
+            virtual bool operator==( const BasePrimitive3D& rPrimitive ) const override;
+
+            /// local decomposition. Implementation will just return children
+            virtual Primitive3DContainer get3DDecomposition(const geometry::ViewInformation3D& rViewInformation) const override;
+
+            /// provide unique ID
+            DeclPrimitive3DIDBlock()
+        };
+
+} // end of namespace drawinglayer::primitive3d
+
+
+#endif //INCLUDED_DRAWINGLAYER_PRIMITIVE3D_GROUPPRIMITIVE3D_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */