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diff --git a/src/helper/geom-nodesatellite.h b/src/helper/geom-nodesatellite.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * NodeSatellite -- a per node holder of data.
+ *//*
+ * Authors:
+ * see git history
+ * Jabier Arraiza Cenoz<jabier.arraiza@marker.es>
+ *
+ * Copyright (C) 2017 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_SATELLITE_H
+#define SEEN_SATELLITE_H
+
+#include <map>
+#include <boost/assign.hpp>
+#include <2geom/sbasis-geometric.h>
+#include "util/enums.h"
+
+enum NodeSatelliteType
+{
+    FILLET = 0,       // Fillet
+    INVERSE_FILLET,   // Inverse Fillet
+    CHAMFER,          // Chamfer
+    INVERSE_CHAMFER,  // Inverse Chamfer
+    INVALID_SATELLITE // Invalid NodeSatellite
+};
+/**
+ * @brief NodeSatellite a per node holder of data.
+ */
+
+class NodeSatellite
+{
+public:
+    NodeSatellite();
+    NodeSatellite(NodeSatelliteType nodesatellite_type);
+
+    virtual ~NodeSatellite();
+    void setIsTime(bool set_is_time)
+    {
+        is_time = set_is_time;
+    }
+    void setSelected(bool set_selected)
+    {
+        selected = set_selected;
+    }
+    void setHasMirror(bool set_has_mirror)
+    {
+        has_mirror = set_has_mirror;
+    }
+    void setHidden(bool set_hidden)
+    {
+        hidden = set_hidden;
+    }
+    void setAmount(double set_amount)
+    {
+        amount = set_amount;
+    }
+    void setAngle(double set_angle)
+    {
+        angle = set_angle;
+    }
+    void setSteps(size_t set_steps)
+    {
+        steps = set_steps;
+    }
+    double lenToRad(double const A, Geom::Curve const &curve_in, Geom::Curve const &curve_out,
+                    NodeSatellite const previousNodeSatellite) const;
+    double radToLen(double const A, Geom::Curve const &curve_in,
+                    Geom::Curve const &curve_out) const;
+
+    double time(Geom::Curve const &curve_in, bool inverse = false) const;
+    double time(double A, bool inverse, Geom::Curve const &curve_in) const;
+    double arcDistance(Geom::Curve const &curve_in) const;
+
+    void setPosition(Geom::Point const p, Geom::Curve const &curve_in, bool inverse = false);
+    Geom::Point getPosition(Geom::Curve const &curve_in, bool inverse = false) const;
+
+    void setNodeSatellitesType(gchar const *A);
+    gchar const *getNodeSatellitesTypeGchar() const;
+    NodeSatelliteType nodesatellite_type;
+    // The value stored could be a time value of the nodesatellite in the curve or a length of distance to the node from
+    // the nodesatellite "is_time" tells us if it's a time or length value
+    bool is_time;
+    bool selected;
+    bool has_mirror;
+    bool hidden;
+    // in "amount" we store the time or distance used in the nodesatellite
+    double amount;
+    double angle;
+    size_t steps;
+};
+
+double timeAtArcLength(double const A, Geom::Curve const &curve_in);
+double arcLengthAt(double const A, Geom::Curve const &curve_in);
+
+#endif // SEEN_SATELLITE_H
+
+/*
+  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 :