src/lib/cell.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,
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// cell.hpp : cell data

#ifndef _CELL_HPP
#define _CELL_HPP

#include "gpc.hpp"
#include "dataset.hpp"
#include "bgl.hpp"
#include "bgllwm.hpp"
#include "bglvtp.hpp"
#include "area.hpp"

class Cell
{
private:
        int             x, y;   // cell id
        BoundingBox     bbox;
        Area            area[32][32];
        DataSet         *cellData;

        void checkFill(LwmDataChunk *chunk, int u, int v, int blocksz);

        void DrawVtpPolygon(VtpDataChunk *chunk);
        void ExtractShoreline(GpcPolygon *shorelines, GpcVertexList *vlist, 
                              int level);
        void PutShoreLine(GpcPolygon *shorelines, GpcVertexList *vlist,
                          int st, int ed, bool needInvert, bool isLoop = false);
        GpcVertexList *InterPolateVTPPoints(GpcVertexList *vl);

public:
        Cell();
        ~Cell();

        static double x2lon(int x);
        static double y2lat(int y);
        static int lon2x(double lon);
        static int lat2y(double lat);

        void setid(int xx, int yy);
        inline int getx(void) { return x; }
        inline int gety(void) { return y; }
        inline BoundingBox *getBoundingBox(void) { return &bbox; }

        bool Clipping(DataSet *source);

        void GenLwmBgl(LwmBgl *bgl);
        void GenVtpBgl(VtpBgl *bgl);
};

#endif