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Diffstat (limited to 'graphics/epix/mask_ellipse.cc')
-rw-r--r-- | graphics/epix/mask_ellipse.cc | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/graphics/epix/mask_ellipse.cc b/graphics/epix/mask_ellipse.cc new file mode 100644 index 0000000000..0eed28f94e --- /dev/null +++ b/graphics/epix/mask_ellipse.cc @@ -0,0 +1,136 @@ +/* + * 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 <rot 13 nujnat at zngupf dot ubylpebff dot rqh> + * 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., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 |