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diff --git a/src/live_effects/lpe-sketch.h b/src/live_effects/lpe-sketch.h
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+++ b/src/live_effects/lpe-sketch.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * @brief LPE sketch effect implementation, see lpe-sketch.cpp.
+ */
+/* Authors:
+ *   Jean-Francois Barraud <jf.barraud@gmail.com>
+ *   Johan Engelen <j.b.c.engelen@utwente.nl>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_LPE_SKETCH_H
+#define INKSCAPE_LPE_SKETCH_H
+
+#include "live_effects/effect.h"
+#include "live_effects/parameter/parameter.h"
+#include "live_effects/parameter/random.h"
+#include "live_effects/parameter/point.h"
+
+#define LPE_SKETCH_USE_CONSTRUCTION_LINES
+//#define LPE_SKETCH_USE_CURVATURE
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+class LPESketch : public Effect {
+public:
+    LPESketch(LivePathEffectObject *lpeobject);
+    ~LPESketch() override;
+
+    Geom::Piecewise<Geom::D2<Geom::SBasis> > doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in) override;
+
+    void doBeforeEffect (SPLPEItem const* lpeitem) override;
+
+private:
+    // add the parameters for your effect here:
+    //PointParam testpointA;
+    ScalarParam nbiter_approxstrokes;
+    ScalarParam strokelength;
+    RandomParam strokelength_rdm;
+    ScalarParam strokeoverlap;
+    RandomParam strokeoverlap_rdm;
+    RandomParam ends_tolerance;
+    RandomParam parallel_offset;
+    RandomParam tremble_size;
+    ScalarParam tremble_frequency;
+
+#ifdef LPE_SKETCH_USE_CONSTRUCTION_LINES
+    ScalarParam nbtangents;
+    ScalarParam tgtscale;
+    ScalarParam tgtlength;
+    RandomParam tgtlength_rdm;
+    RandomParam tgt_places_rdmness;
+#ifdef LPE_SKETCH_USE_CURVATURE
+    ScalarParam min_curvature;
+    ScalarParam max_curvature;
+#endif
+#endif
+    LPESketch(const LPESketch&) = delete;
+    LPESketch& operator=(const LPESketch&) = delete;
+
+    Geom::Piecewise<Geom::D2<Geom::SBasis> > computePerturbation (double s0, double s1);
+
+};
+
+} //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 :