src/lib/bbox.hpp

//
// AutoCoast: Automatic Coastline scenery generator for Flight Simulator
//
// Copyright (c) 2004, Takuya Murakami. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// bbox.hpp : Bounding Box

#ifndef _BBOX_HPP
#define _BBOX_HPP

extern "C" {
#include "gpc.h"
}

static const int onUpperEdge = 0x1;
static const int onRightEdge = 0x2;
static const int onBottomEdge = 0x4;
static const int onLeftEdge = 0x8;

class BoundingBox
{
public:
        double  xmin, xmax;
        double  ymin, ymax;

        BoundingBox();

        gpc_polygon * createClipPolygon(void);
        void destroyClipPolygon(gpc_polygon *poly);

        void initialize(void);
        void setpoint(double x, double y);

        void extend(BoundingBox *target);

        bool isInbox(double x, double y);
        bool isCrossing(BoundingBox &target);
        bool compare(BoundingBox &target);

        int checkEdge(double x, double y);
};

#endif
