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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #ifndef NOPOSITIONGEOMETRY_H
++ #define NOPOSITIONGEOMETRY_H
++
++ #include <QtQuick3D/QQuick3DGeometry>
++
++ // A deliberately malformed geometry: it has non-empty vertex data and a
++ // Triangles primitive type, but no PositionSemantic attribute at all.
++ class NoPositionGeometry : public QQuick3DGeometry
++ {
++ Q_OBJECT
++ QML_NAMED_ELEMENT(NoPositionGeometry)
++
++ public:
++ NoPositionGeometry();
++ };
++
++ #endif