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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* $Id: plcvt.c,v 1.3 2007/05/08 09:09:37 rice Exp $
Coordinate transformation routines.
Copyright (C) 2004 Alan W. Irwin
This file is part of PLplot.
PLplot is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PLplot 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "plplotP.h"
/*--------------------------------------------------------------------------*\
* Transformations returning physical coordinates.
\*--------------------------------------------------------------------------*/
/* device coords to physical coords (x) */
PLINT
plP_dcpcx(PLFLT x)
{
return (ROUND(plsc->phyxmi + plsc->phyxlen * x));
}
/* device coords to physical coords (y) */
PLINT
plP_dcpcy(PLFLT y)
{
return (ROUND(plsc->phyymi + plsc->phyylen * y));
}
/* millimeters from bottom left-hand corner to physical coords (x) */
PLINT
plP_mmpcx(PLFLT x)
{
return (ROUND(plsc->phyxmi + plsc->xpmm * x));
}
/* millimeters from bottom left-hand corner to physical coords (y) */
PLINT
plP_mmpcy(PLFLT y)
{
return (ROUND(plsc->phyymi + plsc->ypmm * y));
}
/* world coords to physical coords (x) */
PLINT
plP_wcpcx(PLFLT x)
{
return (ROUND(plsc->wpxoff + plsc->wpxscl * x));
}
/* world coords to physical coords (y) */
PLINT
plP_wcpcy(PLFLT y)
{
return (ROUND(plsc->wpyoff + plsc->wpyscl * y));
}
/*--------------------------------------------------------------------------*\
* Transformations returning device coordinates.
\*--------------------------------------------------------------------------*/
/* physical coords to device coords (x) */
PLFLT
plP_pcdcx(PLINT x)
{
return (PLFLT) ((x - plsc->phyxmi) / (double) plsc->phyxlen);
}
/* physical coords to device coords (y) */
PLFLT
plP_pcdcy(PLINT y)
{
return (PLFLT) ((y - plsc->phyymi) / (double) plsc->phyylen);
}
/* millimeters from bottom left corner to device coords (x) */
PLFLT
plP_mmdcx(PLFLT x)
{
return ((PLFLT) (x * plsc->xpmm / ABS(plsc->phyxma - plsc->phyxmi)));
}
/* millimeters from bottom left corner to device coords (y) */
PLFLT
plP_mmdcy(PLFLT y)
{
return ((PLFLT) (y * plsc->ypmm / ABS(plsc->phyyma - plsc->phyymi)));
}
/* world coords into device coords (x) */
PLFLT
plP_wcdcx(PLFLT x)
{
return ((PLFLT) (plsc->wdxoff + plsc->wdxscl * x));
}
/* world coords into device coords (y) */
PLFLT
plP_wcdcy(PLFLT y)
{
return ((PLFLT) (plsc->wdyoff + plsc->wdyscl * y));
}
/* subpage coords to device coords (x) */
PLFLT
plP_scdcx(PLFLT x)
{
return ((PLFLT) (plsc->spdxmi + (plsc->spdxma - plsc->spdxmi) * x));
}
/* subpage coords to device coords (y) */
PLFLT
plP_scdcy(PLFLT y)
{
return ((PLFLT) (plsc->spdymi + (plsc->spdyma - plsc->spdymi) * y));
}
/*--------------------------------------------------------------------------*\
* Transformations returning millimeters.
\*--------------------------------------------------------------------------*/
/* device coords to millimeters from bottom left-hand corner (x) */
PLFLT
plP_dcmmx(PLFLT x)
{
return ((PLFLT) (x * ABS(plsc->phyxma - plsc->phyxmi) / plsc->xpmm));
}
/* device coords to millimeters from bottom left-hand corner (y) */
PLFLT
plP_dcmmy(PLFLT y)
{
return ((PLFLT) (y * ABS(plsc->phyyma - plsc->phyymi) / plsc->ypmm));
}
/* world coords into millimeters (x) */
PLFLT
plP_wcmmx(PLFLT x)
{
return ((PLFLT) (plsc->wmxoff + plsc->wmxscl * x));
}
/* world coords into millimeters (y) */
PLFLT
plP_wcmmy(PLFLT y)
{
return ((PLFLT) (plsc->wmyoff + plsc->wmyscl * y));
}
/*--------------------------------------------------------------------------*\
* Transformations returning subpage coordinates.
\*--------------------------------------------------------------------------*/
/* device coords to subpage coords (x) */
PLFLT
plP_dcscx(PLFLT x)
{
return ((PLFLT) ((x - plsc->spdxmi) / (plsc->spdxma - plsc->spdxmi)));
}
/* device coords to subpage coords (y) */
PLFLT
plP_dcscy(PLFLT y)
{
return ((PLFLT) ((y - plsc->spdymi) / (plsc->spdyma - plsc->spdymi)));
}
/*--------------------------------------------------------------------------*\
* 3-d plot transformations.
\*--------------------------------------------------------------------------*/
/* 3-d coords to 2-d projection (x) */
/* See c_plw3d for a mathematical explanation of the transformation. */
PLFLT
plP_w3wcx(PLFLT x, PLFLT y, PLFLT z)
{
(void) z; /* pmr: make it used */
return ((PLFLT) ((x - plsc->basecx) * plsc->cxx +
(y - plsc->basecy) * plsc->cxy));
}
/* 3-d coords to 2-d projection (y) */
/* See c_plw3d for a mathematical explanation of the transformation. */
PLFLT
plP_w3wcy(PLFLT x, PLFLT y, PLFLT z)
{
return ((PLFLT) ((x - plsc->basecx) * plsc->cyx +
(y - plsc->basecy) * plsc->cyy +
(z - plsc->ranmi) * plsc->cyz));
}
|
