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/*
* Sline.h -- ePiX::Sline class (spherical arc)
*
* This file is part of ePiX, a preprocessor for creating high-quality
* line figures in LaTeX
*
* Version 1.2.17
* Last Change: June 29, 2017
*/
/*
* Copyright (C) 2017
* Andrew D. Hwang <ahwang -at- holycross -dot- edu>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*/
/*
* ePiX 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.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EPIX_SLINE
#define EPIX_SLINE
#include "frame.h"
#include "sphere.h"
namespace ePiX {
class P;
class Sline {
public:
Sline(const P& tail, const P& head);
bool malformed() const;
P pole() const; // normalization of tail * head
double cosine() const; // cosine of subtended arc
P operator * (const Sline&) const; // this.pole() * pole()
P reflect(const P&) const;
Sline reflect(const Sline&) const;
bool collinear(const Sline&) const;
bool cuts(const Sline&) const; // we cross arg
void draw() const; // entire arc
void draw_front() const; // front arc
void draw_back() const; // back arc
void draw_line() const; // entire line
void line_front() const; // front line
void line_back() const; // back line
private:
P m_tail;
P m_head;
P m_pole;
bool m_malformed; // tail, head collinear
}; // end of Sline class
} // end of namespace
#endif /* EPIX_SLINE */
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