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/***************************************************************************
*
* Project: OpenCPN
* Purpose: Latitude and Longitude regions
* Author: Sean D'Epagnier
*
***************************************************************************
* Copyright (C) 2015 by Sean D'Epagnier *
* *
* 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. *
***************************************************************************
*/
#ifndef _LLREGION_H_
#define _LLREGION_H_
#include <list>
#ifdef __WXMSW__
#include "GL/gl.h" // local copy for Windows
#include "GL/glu.h"
#else
#ifndef __OCPN__ANDROID__
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glext.h>
#else
#include <qopengl.h>
#include <GL/gl_private.h> // this is a cut-down version of gl.h
#endif
#endif
#include "bbox.h"
#include "cutil.h"
struct contour_pt
{
double y, x;
};
// ----------------------------------------------------------------------------
// LLRegion
// ----------------------------------------------------------------------------
typedef std::list<contour_pt> poly_contour;
class LLBBox;
struct work;
class LLRegion
{
public:
LLRegion() {}
LLRegion( float minlat, float minlon, float maxlat, float maxlon);
LLRegion( const LLBBox& llbbox );
LLRegion( size_t n, const float *points );
LLRegion( size_t n, const double *points );
static bool PointsCCW( size_t n, const double *points );
void Print() const;
void plot(const char*fn) const;
LLBBox GetBox() const;
bool IntersectOut(const LLBBox &box) const;
bool Contains(float lat, float lon) const;
void Clear() { contours.clear(); }
bool Empty() const { return contours.empty(); }
void Intersect(const LLRegion& region);
void Union(const LLRegion& region);
void Subtract(const LLRegion& region);
void Reduce(double factor);
std::list<poly_contour> contours;
private:
bool NoIntersection(const LLBBox& box) const;
bool NoIntersection(const LLRegion& region) const;
void PutContours(work &w, const LLRegion& region, bool reverse=false);
void Put(const LLRegion& region, int winding_rule, bool reverse=false);
void Combine(const LLRegion& region);
void InitBox( float minlat, float minlon, float maxlat, float maxlon);
void InitPoints( size_t n, const double *points );
void AdjustLongitude();
void Optimize();
LLBBox m_box;
};
#endif
// _LLREGION_H_
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