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Support TeX elements in FreeType renderer. * libinterp/corefcn/txt-eng.cc: New file. Contains mapping from symbol name to character code, in Unicode and MS symbol. * libinterp/corefcn/modules.mk (COREFCN_SRC): Add txt-eng.cc. * libinterp/corefcn/oct-tex-lexer.ll: Add "\n" to rules applicable to ".", as the latter does not include new line characters. * libinterp/corefcn/oct-tex-parser.yy: Remove debug statements. * libinterp/corefcn/txt-eng.ft.cc (gripe_missing_glyph, gripe_glyph_render): Change signature from char to FT_ULong. (ft_render::ft_render): Adapt to new/removed members. (ft_render::~ft_render): Remove use of fonts member. (ft_render::set_font): Likewise. Use font instead. (ft_render::push_new_line): Likewise. Change meaning of yoffset and initialize line_yoffset. (ft_render::update_line_bbox): New method. (ft_render::set_mode): Change meaning of yoffset and initialize line_yoffset. (ft_render::process_character): New method. (ft_render::visit(text_element_string)): Use it. (ft_render::visit(text_element_list), ft_render::visit(text_element_subscript), ft_render::visit(text_element_superscript), ft_render::visit(text_element_color), ft_render::visit(text_element_fontsize), ft_render::visit(text_element_fontname), ft_render::visit(text_element_fontstyle), ft_render::visit(text_element_symbol)): New methods. (ft_render::set_color): Use color member instead of red/green/blue. * libinterp/corefcn/txt-eng-ft.h (ft_render::visit(text_element_list), ft_render::visit(text_element_subscript), ft_render::visit(text_element_superscript), ft_render::visit(text_element_color), ft_render::visit(text_element_fontsize), ft_render::visit(text_element_fontname), ft_render::visit(text_element_fontstyle), ft_render::visit(text_element_symbol)): New methods. (ft_render::update_line_bbox, ft_render::process_character): New methods. (ft_render::current_face): Removed method.i (ft_render::font): New member, replaces obsolete ft_render::fonts. (ft_render::line_yoffset): New member. (ft_render::color): New member, replaces obsolete red, green and blue. (ft_render::ft_font::ft_font()): Implement default constructor. (ft_render::ft_font::operator=): Fix incorrect use of FT_Reference_Face return value. (ft_render::ft_font::is_valid): New method. * libinterp/corefcn/txt-eng.h (class text_element_symbol, class text_element_fontname, class text_element_fontsize, class text_element_fontname, class text_element_fontstyle, class text_element_color): Add forward definition. (text_element_symbol::invalid_code): New enum. (text_element_symbol::code): New member. (text_element_symbol::text_element_symbol): Initialize it. (text_element_symbol::get_symbol_code): New method. (text_element_fontstyle::get_fontstyle): New method. (text_element_fontname::get_fontname): Renamed from fontname. (text_element_fontsize::get_fontsize): Renamed from fontsize.
author Michael Goffioul <michael.goffioul@gmail.com>
date Sun, 18 Aug 2013 16:36:46 -0400
parents 87ba70043bfc
children 68bcac3c043a
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 Sylvain Pelissier
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} ellipsoid (@var{xc}, @var{yc}, @var{zc}, @var{xr}, @var{yr}, @var{zr}, @var{n})
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21 ## @deftypefnx {Function File} {} ellipsoid (@dots{}, @var{n})
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22 ## @deftypefnx {Function File} {} ellipsoid (@var{hax}, @dots{})
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23 ## @deftypefnx {Function File} {[@var{x}, @var{y}, @var{z}] =} ellipsoid (@dots{})
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24 ## Plot a 3-D ellipsoid.
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25 ##
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26 ## The inputs @var{xc}, @var{yc}, @var{zc} specify the center of the ellipsoid.
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27 ## The inputs @var{xr}, @var{yr}, @var{zr} specify the semi-major axis lengths.
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28 ##
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29 ## The optional input @var{n} determines the number of faces around the
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30 ## the circumference of the cylinder. The default value is 20.
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31 ##
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32 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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33 ## rather than the current axes returned by @code{gca}.
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34 ##
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35 ## If outputs are requested @code{ellipsoid} returns three matrices in
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36 ## @code{meshgrid} format, such that @code{surf (@var{x}, @var{y}, @var{z})}
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37 ## generates the ellipsoid.
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38 ## @seealso{cylinder, rectangle, sphere}
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39 ## @end deftypefn
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40
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41 ## Author: Sylvain Pelissier <sylvain.pelissier@gmail.com>
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42
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43 function [xx, yy, zz] = ellipsoid (varargin)
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44
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45 [hax, varargin, nargin] = __plt_get_axis_arg__ ("ellipsoid", varargin{:});
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46
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47 if (nargin != 6 && nargin != 7)
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48 print_usage ();
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49 endif
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50
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51 xc = varargin{1};
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52 yc = varargin{2};
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53 zc = varargin{3};
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54 xr = varargin{4};
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55 yr = varargin{5};
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56 zr = varargin{6};
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57
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58 if (nargin == 6)
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59 n = 20;
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60 else
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61 n = varargin{7};
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62 endif
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63
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64 theta = linspace (0, 2 * pi, n + 1);
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65 phi = linspace (-pi / 2, pi / 2, n + 1);
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66 [theta, phi] = meshgrid (theta, phi);
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67
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68 x = xr .* cos (phi) .* cos (theta) + xc;
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69 y = yr .* cos (phi) .* sin (theta) + yc;
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70 z = zr .* sin (phi) + zc;
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71
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72 if (nargout > 0)
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73 xx = x;
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74 yy = y;
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75 zz = z;
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76 else
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77 oldfig = [];
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78 if (isempty (hax))
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79 oldfig = get (0, "currentfigure");
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80 endif
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81 unwind_protect
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82 hax = newplot (hax);
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83
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84 surf (x, y, z);
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85 unwind_protect_cleanup
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86 if (! isempty (oldfig))
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87 set (0, "currentfigure", oldfig);
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88 endif
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89 end_unwind_protect
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90 endif
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91
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92 endfunction
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93
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94
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95 %!demo
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96 %! clf;
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97 %! ellipsoid (0, 0, 1, 2, 3, 4, 20);
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98 %! title ('ellipsoid()');
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99