/**********************************************************************
 * $Id: Dimension.h 1820 2006-09-06 16:54:23Z mloskot $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************/

#ifndef GEOS_GEOM_DIMENSION_H
#define GEOS_GEOM_DIMENSION_H

#include <geos/inline.h>

namespace geos {
namespace geom { // geos::geom

/// Constants representing the dimensions of a point, a curve and a surface.
//
/// Also, constants representing the dimensions of the empty geometry and
/// non-empty geometries, and a wildcard dimension meaning "any dimension".
///
class Dimension {
public:
	enum DimensionType {
		/// Dimension value for any dimension (= {FALSE, TRUE}).
		DONTCARE=-3,

		/// Dimension value of non-empty geometries (= {P, L, A}).
		True=-2,

		/// Dimension value of the empty geometry (-1).
		False=-1,

		/// Dimension value of a point (0).
		P=0,

		/// Dimension value of a curve (1).
		L=1,

		/// Dimension value of a surface (2).
		A=2
	};

	//static const int P = 0;			/// Dimension value of a point (0).
	//static const int L = 1;			/// Dimension value of a curve (1).
	//static const int A = 2;			/// Dimension value of a surface (2).
	//static const int False = -1;	/// Dimension value of the empty geometry (-1).
	//static const int True = -2;		/// Dimension value of non-empty geometries (= {P, L, A}).
	//static const int DONTCARE = -3;	/// Dimension value for any dimension (= {FALSE, TRUE}).
	static char toDimensionSymbol(int dimensionValue);

	static int toDimensionValue(char dimensionSymbol);

};

} // namespace geos::geom
} // namespace geos

#ifdef GEOS_INLINE
# include "geos/geom/Envelope.inl"
#endif

#endif // ndef GEOS_GEOM_DIMENSION_H

/**********************************************************************
 * $Log$
 * Revision 1.4  2006/05/04 15:49:39  strk
 * updated all Geometry::getDimension() methods to return Dimension::DimensionType (closes bug#93)
 *
 * Revision 1.3  2006/04/07 05:44:32  mloskot
 * Added name for anonymous enum in Dimension class (bug). Added missing new-line at the end of source files. Removed CR from line ends.
 *
 * Revision 1.2  2006/03/24 09:52:41  strk
 * USE_INLINE => GEOS_INLINE
 *
 * Revision 1.1  2006/03/09 16:46:49  strk
 * geos::geom namespace definition, first pass at headers split
 *
 **********************************************************************/