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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __FREESTYLE_NATURE_H__
+#define __FREESTYLE_NATURE_H__
+
+/** \file blender/freestyle/intern/winged_edge/Nature.h
+ *  \ingroup freestyle
+ *  \brief Different natures for both vertices and edges
+ *  \author Emmanuel Turquin
+ *  \date 01/07/2003
+ */
+
+/*! Namespace gathering the different possible natures of 0D and 1D elements of the ViewMap */
+namespace Nature {
+
+/* XXX Why not using enums??? */
+
+typedef unsigned short VertexNature;
+/*! true for any 0D element */
+static const VertexNature POINT        = 0;        // 0
+/*! true for SVertex */
+static const VertexNature S_VERTEX     = (1 << 0); // 1
+/*! true for ViewVertex */
+static const VertexNature VIEW_VERTEX  = (1 << 1); // 2
+/*! true for NonTVertex */
+static const VertexNature NON_T_VERTEX = (1 << 2); // 4
+/*! true for TVertex */
+static const VertexNature T_VERTEX     = (1 << 3); // 8
+/*! true for CUSP */
+static const VertexNature CUSP         = (1 << 4); // 16
+
+typedef unsigned short EdgeNature;
+/*! true for non feature edges (always false for 1D elements of the ViewMap) */
+static const EdgeNature NO_FEATURE         = 0;        // 0
+/*! true for silhouettes */
+static const EdgeNature SILHOUETTE         = (1 << 0); // 1
+/*! true for borders */
+static const EdgeNature BORDER             = (1 << 1); // 2
+/*! true for creases */
+static const EdgeNature CREASE             = (1 << 2); // 4
+/*! true for ridges */
+static const EdgeNature RIDGE              = (1 << 3); // 8
+/*! true for valleys */
+static const EdgeNature VALLEY             = (1 << 4); // 16
+/*! true for suggestive contours */
+static const EdgeNature SUGGESTIVE_CONTOUR = (1 << 5); // 32
+/*! true for material boundaries */
+static const EdgeNature MATERIAL_BOUNDARY  = (1 << 6); // 64
+/*! true for user-defined edge marks */
+static const EdgeNature EDGE_MARK          = (1 << 7); // 128
+
+} // end of namespace Nature
+
+#endif // __FREESTYLE_NATURE_H__