/*
 * Copyright (c) 1990, 1991 Stanford University
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Stanford not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  Stanford makes no representations about
 * the suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
 * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef __GNUG__
#pragma interface
#endif

/*
 * Interface to geometrical objects used to implement Graphic primitives.
 */

#ifndef unidraw_graphic_geomobjs_h
#define unidraw_graphic_geomobjs_h

#include <IV-2_6/InterViews/defs.h>
#include <Unidraw/enter-scope.h>

#include <IV-2_6/_enter.h>

class PointObj {
public:
    PointObj(Coord = 0, Coord = 0);
    PointObj(PointObj*);

    float Distance(PointObj&);
public:
    Coord _x, _y;
};

class LineObj {
public:
    LineObj(Coord = 0, Coord = 0, Coord = 0, Coord = 0);
    LineObj(LineObj*);

    boolean Contains(PointObj&);
    int Same(PointObj& p1, PointObj& p2);
    boolean Intersects(LineObj&);
public:
    PointObj _p1, _p2;
};

class BoxObj {
public:
    BoxObj(Coord = 0, Coord = 0, Coord = 0, Coord = 0);
    BoxObj(BoxObj*);

    boolean Contains(PointObj&);
    boolean Intersects(BoxObj&);
    boolean Intersects(LineObj&);
    BoxObj operator-(BoxObj&);
    BoxObj operator+(BoxObj&);
    boolean Within(BoxObj&);
public:
    Coord _left, _right;
    Coord _bottom, _top;
};

class MultiLineObj {
public:
    MultiLineObj(Coord* = nil, Coord* = nil, int = 0);

    void GetBox(BoxObj& b);
    boolean Contains(PointObj&);
    boolean Intersects(LineObj&);
    boolean Intersects(BoxObj&);
    boolean Within(BoxObj&);
    void SplineToMultiLine(Coord* cpx, Coord* cpy, int cpcount);
    void ClosedSplineToPolygon(Coord* cpx, Coord* cpy, int cpcount);
protected:
    void GrowBuf();
    boolean CanApproxWithLine(
	double x0, double y0, double x2, double y2, double x3, double y3
    );
    void AddLine(double x0, double y0, double x1, double y1);
    void AddBezierArc(
        double x0, double y0, double x1, double y1,
        double x2, double y2, double x3, double y3
    );
    void CalcSection(
	Coord cminus1x, Coord cminus1y, Coord cx, Coord cy,
	Coord cplus1x, Coord cplus1y, Coord cplus2x, Coord cplus2y
    );
public:
    Coord* _x, *_y;
    int _count;
};

class FillPolygonObj : public MultiLineObj {
public:
    FillPolygonObj(Coord* = nil, Coord* = nil, int = 0);
    virtual ~FillPolygonObj();

    boolean Contains(PointObj&);
    boolean Intersects(LineObj&);
    boolean Intersects(BoxObj&);
protected:
    void Normalize();
protected:
    Coord* _normx, *_normy;
    int _normCount;
};

class Extent {
public:
    Extent(float = 0, float = 0, float = 0, float = 0, float = 0);
    Extent(Extent&);

    boolean Undefined();
    boolean Within(Extent& e);
    void Merge(Extent&);
public:
    /* defines lower left and center of an object */
    float _left, _bottom, _cx, _cy, _tol;
};

/*
 * inlines
 */

inline boolean Extent::Undefined () { return _left == _cx && _bottom == _cy; }

#include <IV-2_6/_leave.h>

#endif