1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* glyph.cc -- ePiX screen implemenation for labels and markers
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.22
* Last Change: September 24, 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 <sstream>
#include "constants.h"
#include "angle_units.h"
#include "functions.h"
#include "pairs.h"
#include "affine.h"
#include "screen_mask.h"
#include "length.h"
#include "marker_style.h"
#include "label_style.h"
#include "format.h"
#include "state.h"
#include "picture_data.h"
#include "picture.h"
#include "glyph.h"
namespace ePiX {
glyph::glyph(const pair& here, const pair& offset,
const std::string& label, const epix_mark_type mark,
const marker_sizes& sizes,
const label_state& style, const bool seen)
: m_here(here), m_offset(offset),
m_label(label), m_mark(mark), m_sizes(sizes),
m_style(style), m_seen(seen) { }
glyph& glyph::map_by(const affine& f)
{
m_here = f(m_here); // new location
// map offset, preserving length
const double old_norm(norm(m_offset));
m_offset = f(m_offset) - f(pair(0,0)); // new displacement
const double new_norm(norm(m_offset));
if (EPIX_EPSILON < new_norm)
m_offset *= old_norm/new_norm; // scale to preserve page length
// compute new label angle; work in radians for safety/efficiency
const double th(PI_180*m_style.label_angle()); // old angle in radians
// new baseline direction
const pair tmp_dir(f(pair(std::cos(th), std::sin(th))) - f(pair(0,0)));
// no change if old baseline maps to zero
if (EPIX_EPSILON < norm(tmp_dir))
{
// new angle in current units
double theta(Atan2(tmp_dir.x2(), tmp_dir.x1()));
// effectively, reflect label; works well stylistically
if (f.reverses_orientation())
theta -= 0.5*full_turn();
m_style.label_angle(theta);
}
return *this;
}
glyph& glyph::crop_to(const screen_mask& M)
{
if (M.crops(m_here))
m_seen = false;
return *this;
}
glyph* glyph::clone() const
{
return new glyph(*this);
}
bool glyph::is_empty() const
{
return !m_seen;
}
std::string glyph::print_to(const format& fmt, const std::string& len) const
{
if (is_empty())
return "";
std::stringstream obuf;
// print (masked) label, if any, before mark.
if (m_label != "")
obuf << fmt.print_text(m_here, m_offset, m_label, m_style, len);
if (m_mark != TEXT && m_mark != PATH)
obuf << fmt.print_mark(m_here, m_offset, m_mark, m_sizes, m_style, len);
return obuf.str();
}
void glyph::add_to_palette() const
{
the_picture().add_to_palette(m_style.text_color())
.add_to_palette(m_style.mask_color())
.add_to_palette(m_style.label_border().color());
}
} // end of namespace
|
