/******************************************************************************
 * $Id: ilihelper.h,v 1.1 2006/02/13 18:18:53 pka Exp $
 *
 * Project:  Interlis 1/2 Translator
 * Purpose:   Definition of classes for OGR Interlis 1 driver.
 * Author:   Pirmin Kalberer, Sourcepole AG
 *
 ******************************************************************************
 * Copyright (c) 2004, Pirmin Kalberer, Sourcepole AG
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ******************************************************************************
 *
 * $Log: ilihelper.h,v $
 * Revision 1.1  2006/02/13 18:18:53  pka
 * Interlis 2: Support for nested attributes
 * Interlis 2: Arc interpolation
 *
 * Revision 1.2  2005/08/06 22:21:53  pka
 * Area polygonizer added
 *
 * Revision 1.1  2005/07/08 22:10:57  pka
 * Initial import of OGR Interlis driver
 *
 */

#ifndef _ILIHELPER_H_INCLUDED
#define _ILIHELPER_H_INCLUDED

#include "ogr_geometry.h"

#ifndef PI
#define PI  3.1415926535897932384626433832795
#endif

OGRPoint *getARCCenter(OGRPoint *ptStart, OGRPoint *ptArc, OGRPoint *ptEnd);
double getPhi(OGRPoint *center, OGRPoint *pt);
void interpolateArc(OGRLineString* line, OGRPoint *ptStart, OGRPoint *ptOnArc, OGRPoint *ptEnd, double arcIncr);

#endif /* _ILIHELPER_H_INCLUDED */