
///////////////////////////////////////////////////////////
//                                                       //
//                         SAGA                          //
//                                                       //
//      System for Automated Geoscientific Analyses      //
//                                                       //
//                     Tool Library                      //
//                    shapes_polygons                    //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//                 Polygon_Intersection.h                //
//                                                       //
//                 Copyright (C) 2003 by                 //
//                      Olaf Conrad                      //
//                                                       //
//-------------------------------------------------------//
//                                                       //
// This file is part of 'SAGA - System for Automated     //
// Geoscientific Analyses'. SAGA 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.       //
//                                                       //
// SAGA 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, see   //
// <http://www.gnu.org/licenses/>.                       //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//    e-mail:     oconrad@saga-gis.org                   //
//                                                       //
//    contact:    Olaf Conrad                            //
//                Institute of Geography                 //
//                University of Hamburg                  //
//                Germany                                //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#ifndef HEADER_INCLUDED__Polygon_Intersection_H
#define HEADER_INCLUDED__Polygon_Intersection_H


///////////////////////////////////////////////////////////
//                                                       //
//                                                       //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#include <saga_api/saga_api.h>


///////////////////////////////////////////////////////////
//                                                       //
//                                                       //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
class CPolygon_Overlay : public CSG_Tool
{
public:
	CPolygon_Overlay(const CSG_String &Name, bool bClip = false);

	virtual CSG_String		Get_MenuPath		(void)	{	return( _TL("Overlay") );	}


protected:

	bool					Prepend_Description	(const CSG_String &Text);

	bool					Initialize			(CSG_Shapes **ppA, CSG_Shapes **ppB, bool bBothAttributes);
	bool					Finalize			(void);

	bool					Get_Intersection	(CSG_Shapes *pA, CSG_Shapes *pB);

	bool					Get_Difference		(CSG_Shapes *pA, CSG_Shapes *pB, bool bInvert = false);


private:

	bool					m_bSplit = true, m_bInvert = false;

	CSG_Shapes				*m_pA = NULL, *m_pB = NULL, *m_pAB = NULL, m_A, m_B;


	bool					_Clip				(CSG_Shapes *pClip, CSG_Shapes *pPolygons, CSG_Shapes *pClipped);

	CSG_Shape_Polygon *		_Add_Polygon		(sLong id_A, sLong id_B);
	bool					_Add_Polygon		(CSG_Shape_Polygon *pPolygon, sLong id_A, sLong id_B = -1);
	bool					_Fit_Polygon		(CSG_Shape_Polygon *pPolygon);

};


///////////////////////////////////////////////////////////
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
class CPolygon_Intersection : public CPolygon_Overlay
{
public:
	CPolygon_Intersection(void);


protected:

	virtual bool			On_Execute			(void);

};

//---------------------------------------------------------
class CPolygon_Difference : public CPolygon_Overlay
{
public:
	CPolygon_Difference(void);


protected:

	virtual bool			On_Execute			(void);

};

//---------------------------------------------------------
class CPolygon_SymDifference : public CPolygon_Overlay
{
public:
	CPolygon_SymDifference(void);


protected:

	virtual bool			On_Execute			(void);

};

//---------------------------------------------------------
class CPolygon_Union : public CPolygon_Overlay
{
public:
	CPolygon_Union(void);


protected:

	virtual bool			On_Execute			(void);

};

//---------------------------------------------------------
class CPolygon_Identity : public CPolygon_Overlay
{
public:
	CPolygon_Identity(void);


protected:

	virtual bool			On_Execute			(void);

};

//---------------------------------------------------------
class CPolygon_Update : public CPolygon_Overlay
{
public:
	CPolygon_Update(void);


protected:

	virtual bool			On_Execute			(void);

};


///////////////////////////////////////////////////////////
//                                                       //
//                                                       //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#endif // #ifndef HEADER_INCLUDED__Polygon_Intersection_H
