1PCMEQU(3NCARG) NCAR GRAPHICS PCMEQU(3NCARG)
2
6 PCMEQU - Draws characters of "medium quality". It does this by drawing
7 lines, just as PCHIQU does, but it does not produce quite such fancy
8 characters. No function codes may be used. Using PCMEQU to draw a given
9 string of characters will create a larger metafile than if PCLOQU were
10 used, which may be a disadvantage. However, it may also be more
11 dependable, in that it does not depend on capabilities the translator
12 may or may not have.
13 PLCHMQ is an alternate name for the routine PCMEQU.
15
17 CALL PCMEQU (XPOS,YPOS,CHRS,SIZE,ANGD,CNTR)
18
20 #include <ncarg/ncargC.h>
21 void c_pcmequ (float xpos, float ypos, char *chrs,
23 float size, float angd, float cntr)
24
26 XPOS,YPOS (input expressions of type REAL) specify positioning
27 coordinates for the characters to be drawn. If the internal
28 parameter ´MA´ has the value 0, these are given in the
29 current user coordinate system; otherwise, they are given
30 in an arbitrary X/Y coordinate system, as implied by the
31 value of ´MA´ and the nature of the routine CPMPXY. (For
32 example, if ´MA´ has the value 1 and the default version of
33 CPMPXY is being used, then XPOS is a longitude, in degrees,
34 and YPOS is a latitude, in degrees.) The argument CNTR
35 (described below) specifies how the characters are to be
36 positioned relative to the point (XPOS,YPOS).
37 CHRS (an input constant or variable of type CHARACTER) contains
39 a character string to be drawn. The number of characters in
40 CHRS is taken to be LEN(CHRS); to use characters "m"
41 through "n" from a character variable CHRS, use the
42 FORTRAN-77 substring notation "CHRS(m:n)". The string may
43 include any of the 95 characters space, exclamation point,
44 double quote, pound sign, dollar sign, percent sign,
45 ampersand, apostrophe, left parenthesis, right parenthesis,
46 asterisk, plus sign, comma, minus sign, period, slash, 0-9,
47 colon, semi-colon, less than sign, equals sign, greater
48 than sign, question mark, at sign, A-Z, left square
49 bracket, backslash, right square bracket, hat, underscore,
50 backwards quote, a-z, left curly bracket, vertical bar,
51 right curly bracket, and tilde. Function codes, like those
52 in calls to PCHIQU, may not be used.
53 SIZE (an input expression of type REAL) specifies the desired
55 character size. If the internal parameter ´MA´ is zero,
56 then the following comments apply:
57 · If SIZE is less than or equal to zero, its absolute
59 value specifies the size as a multiple of a default
60 digitized size on a 1024x1024 grid, on which blanks
61 are 16 units wide.
62 · If SIZE is greater than zero, but less than one, it
64 specifies the desired width of a blank as a fraction
65 of the distance across the plotter frame. This is
66 the recommended scheme.
67 · If SIZE is greater than or equal to one, it
69 specifies the desired width of a blank in plotter
70 coordinates, as defined by default or by a user´s
71 call to the SPPS routine SETI. Note that use of the
72 routine SETI is now discouraged.
73 If ´MA´ is nonzero, then SIZE is the desired width of a
75 blank as a value in the X/Y coordinate system in which XPOS
76 and YPOS are given.
77 Capital letters are 4/6 as wide as a blank and, by default,
79 7/4 as high as they are wide (the internal parameter ´HW´
80 may be used to change the latter value). The distance from
81 the center of each character to the center of the next is
82 constant and is equal to one blank width.
83 Note that, if the desired character height ("h") is known,
85 one should use SIZE = (6/7) * h.
86 SIZE is defined in such a way as to be consistent with
88 PCHIQU. If one changes a "CALL PCHIQU" to a "CALL PCMEQU"
89 (assuming that no function codes are used in the string, of
90 course), the results will be much the same, but the length
91 of the string will be different. If one uses SIZE less than
92 zero and one has reset the PCHIQU internal parameter ´PW´
93 to something other than 16, the difference in the output of
94 the two routines will be greater.
95 ANGD (an input expression of type REAL) is the angle, in degrees
97 counterclockwise from the positive X axis, at which the
98 character string is to be written.
99 CNTR (an input expression of type REAL) is the centering option,
101 as follows:
102 · CNTR = -1. means that (XPOS,YPOS) is the center of
104 the left edge of the first character.
105 · CNTR = 1. means that (XPOS,YPOS) is the center of
107 the right edge of the last character.
108 · CNTR = s means that (XPOS,YPOS) is a point obtained
110 by linear interpolation along the line joining the
111 two points mentioned above (the first point being
112 associated with the value -1 and the second with the
113 value +1). The value "0." gives the midpoint of the
114 line.
115 Upon return from PCMEQU, all arguments are unchanged.
117
119 The C-binding argument descriptions are the same as the FORTRAN
120 argument descriptions.
121
123 Use the ncargex command to see the following relevant examples: cbex01,
124 epltch, tpltch.
125
127 To use PCMEQU or c_pcmequ, load the NCAR Graphics libraries ncarg,
128 ncarg_gks, and ncarg_c, preferably in that order.
129
131 Online: plotchar, pcdlsc, pcgetc, pcgeti, pcgetr, pchiqu, pcloqu,
132 pcmpxy, pcpnwi, pcrset, pcsetc, pcseti, pcsetr, ncarg_cbind.
133 Hardcopy: NCAR Graphics Fundamentals, UNIX Version
135
137 Copyright (C) 1987-2009
138 University Corporation for Atmospheric Research
139 The use of this Software is governed by a License Agreement.
140UNIX March 1993 PCMEQU(3NCARG)