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diff --git a/src/live_effects/lpe-extrude.h b/src/live_effects/lpe-extrude.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * @brief LPE effect for extruding paths (making them "3D").
+ */
+/* Authors:
+ *   Johan Engelen <j.b.c.engelen@utwente.nl>
+ *
+ * Copyright (C) 2009 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_LPE_EXTRUDE_H
+#define INKSCAPE_LPE_EXTRUDE_H
+
+#include "live_effects/effect.h"
+#include "live_effects/parameter/parameter.h"
+#include "live_effects/parameter/vector.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+class LPEExtrude : public Effect {
+public:
+    LPEExtrude(LivePathEffectObject *lpeobject);
+    ~LPEExtrude() override;
+
+    Geom::Piecewise<Geom::D2<Geom::SBasis> > doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in) override;
+
+    void resetDefaults(SPItem const* item) override;
+
+private:
+    VectorParam extrude_vector;
+
+    LPEExtrude(const LPEExtrude&) = delete;
+    LPEExtrude& operator=(const LPEExtrude&) = delete;
+};
+
+} //namespace LivePathEffect
+} //namespace Inkscape
+
+#endif
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :