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/*
* mask_ellipse.cc -- ePiX ellipse crop mask
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.10
* Last Change: August 09, 2007
*/
/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
* 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
*/
#include <cmath>
#include "functions.h"
//#include "errors.h"
#include "constants.h"
#include "pairs.h"
#include "Color.h"
#include "paint_style.h"
#include "length.h"
#include "pen_line.h"
#include "pen_fill.h"
#include "edge_data.h"
#include "screen_crop.h"
#include "screen_mask.h"
#include "mask_ellipse.h"
namespace ePiX {
mask_ellipse::mask_ellipse(const pair& arg1, const pair& arg2)
: m_hmin(min(arg1.x1(), arg2.x1())),
m_hmax(max(arg1.x1(), arg2.x1())),
m_vmin(min(arg1.x2(), arg2.x2())),
m_vmax(max(arg1.x2(), arg2.x2()))
{
const double dt(2*M_PI/EPIX_NUM_PTS);
const pair ctr(0.5*(m_hmin + m_hmax), 0.5*(m_vmin + m_vmax));
const double hsz(0.5*(m_hmax - m_hmin));
const double vsz(0.5*(m_vmax - m_vmin));
for (unsigned int i=0; i<EPIX_NUM_PTS; ++i)
m_border.push_back(edge2d(ctr + pair(hsz*std::cos(i*dt),
vsz*std::sin(i*dt)),
ctr + pair(hsz*std::cos((i+1)*dt),
vsz*std::sin((i+1)*dt)), true));
}
mask_ellipse* mask_ellipse::clone() const
{
return new mask_ellipse(*this);
}
// corners and midpoints
double mask_ellipse::h_min() const { return m_hmin; }
double mask_ellipse::v_min() const { return m_vmin; }
double mask_ellipse::h_max() const { return m_hmax; }
double mask_ellipse::v_max() const { return m_vmax; }
double mask_ellipse::h_avg() const { return 0.5*(m_hmin+m_hmax); }
double mask_ellipse::v_avg() const { return 0.5*(m_vmin+m_vmax); }
double mask_ellipse::h_size() const { return m_hmax - m_hmin; }
double mask_ellipse::v_size() const { return m_vmax - m_vmin; }
// ellipse-specific functions
bool mask_ellipse::crops(const pair& arg) const
{
const double dx((arg.x1() - h_avg())/h_size());
const double dy((arg.x2() - v_avg())/v_size());
return !(dx*dx + dy*dy <= 0.25);
}
std::list<edge2d>& mask_ellipse::crop_path(std::list<edge2d>& L) const
{
return crop_path_2nd(m_border, L);
}
std::list<edge2d>& mask_ellipse::crop_loop(std::list<edge2d>& L) const
{
return crop_loop_2nd(m_border, L);
}
pen_line mask_ellipse::border(const Color& col, const length& len) const
{
return pen_line(pen_data(col, len), Xfine(), m_border);
}
pen_fill mask_ellipse::backing(const Color& col) const
{
return pen_fill(col, pen_data(col, PLAIN_WIDTH), 0, m_border);
}
pen_line mask_ellipse::border() const
{
return pen_line(the_paint_style().line_pen(),
the_paint_style().base_pen(), m_border);
}
pen_fill mask_ellipse::backing() const
{
const Color col(the_paint_style().fill_color());
return pen_fill(col, pen_data(col, PLAIN_WIDTH), 0, m_border);
}
} // end of ePiX namespace
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