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diff --git a/src/livarot/sweep-event.h b/src/livarot/sweep-event.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef INKSCAPE_LIVAROT_SWEEP_EVENT_H
+#define INKSCAPE_LIVAROT_SWEEP_EVENT_H
+/** \file
+ * Intersection events.
+ */
+
+#include <2geom/point.h>
+class SweepTree;
+
+
+/**
+ * An intersection event structure to record any intersections that are
+ * detected (predicted) during the sweepline.
+ */
+class SweepEvent
+{
+public:
+    SweepTree *sweep[2];   /*!< Nodes associated with the left and right edge of the intersection. */
+
+    Geom::Point posx;      /*!< Point of the intersection. */
+    double tl;             /*!< Time value of the intersection on the left edge (tl).*/
+    double tr;             /*!< Time value of the intersection on the right edge (tr). */
+
+    int ind;               /*!< Index in the binary heap. */
+
+    SweepEvent();   // not used.
+    virtual ~SweepEvent();  // not used.
+
+    /**
+     * Initialize the sweep event.
+     *
+     * @param iLeft The left node of the intersection.
+     * @param iRight The right node of the intersection.
+     * @param iPt The intersection point.
+     * @param itl The time value of the intersection on the left edge.
+     * @param itr The time value of the intersection on the right edge.
+     */
+    void MakeNew (SweepTree * iLeft, SweepTree * iRight, Geom::Point const &iPt,
+                  double itl, double itr);
+
+    /// Void a SweepEvent structure.
+
+    /**
+     * Empty the sweep event data.
+     *
+     * Also reset event pointers of any SweepTree nodes that might point to this event.
+     */
+    void MakeDelete ();
+};
+
+
+#endif /* !INKSCAPE_LIVAROT_SWEEP_EVENT_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 :