PCMEQU - Draws characters of "medium quality". It does
this by drawing lines, just as PCHIQU does, but it does not produce quite
such fancy characters. No function codes may be used. Using PCMEQU to draw a
given string of characters will create a larger metafile than if PCLOQU were
used, which may be a disadvantage. However, it may also be more dependable,
in that it does not depend on capabilities the translator may or may not
have.
PLCHMQ is an alternate name for the routine PCMEQU.
CALL PCMEQU (XPOS,YPOS,CHRS,SIZE,ANGD,CNTR)
#include <ncarg/ncargC.h>
void c_pcmequ (float xpos, float ypos, char *chrs,
float size, float angd, float cntr)
- XPOS,YPOS
- (input expressions of type REAL) specify positioning coordinates for the
characters to be drawn. If the internal parameter ´MA´ has
the value 0, these are given in the current user coordinate system;
otherwise, they are given in an arbitrary X/Y coordinate system, as
implied by the value of ´MA´ and the nature of the routine
CPMPXY. (For example, if ´MA´ has the value 1 and the
default version of CPMPXY is being used, then XPOS is a longitude, in
degrees, and YPOS is a latitude, in degrees.) The argument CNTR (described
below) specifies how the characters are to be positioned relative to the
point (XPOS,YPOS).
- CHRS
- (an input constant or variable of type CHARACTER) contains a character
string to be drawn. The number of characters in CHRS is taken to be
LEN(CHRS); to use characters "m" through "n" from a
character variable CHRS, use the FORTRAN-77 substring notation
"CHRS(m:n)". The string may include any of the 95 characters
space, exclamation point, double quote, pound sign, dollar sign, percent
sign, ampersand, apostrophe, left parenthesis, right parenthesis,
asterisk, plus sign, comma, minus sign, period, slash, 0-9, colon,
semi-colon, less than sign, equals sign, greater than sign, question mark,
at sign, A-Z, left square bracket, backslash, right square bracket, hat,
underscore, backwards quote, a-z, left curly bracket, vertical bar, right
curly bracket, and tilde. Function codes, like those in calls to PCHIQU,
may not be used.
- SIZE
- (an input expression of type REAL) specifies the desired character size.
If the internal parameter ´MA´ is zero, then the following
comments apply:
- If SIZE is less than or equal to zero, its absolute value specifies the
size as a multiple of a default digitized size on a 1024x1024 grid, on
which blanks are 16 units wide.
- If SIZE is greater than zero, but less than one, it specifies the desired
width of a blank as a fraction of the distance across the plotter frame.
This is the recommended scheme.
- If SIZE is greater than or equal to one, it specifies the desired width of
a blank in plotter coordinates, as defined by default or by a
user´s call to the SPPS routine SETI. Note that use of the routine
SETI is now discouraged.
-
- If ´MA´ is nonzero, then SIZE is the desired width of a
blank as a value in the X/Y coordinate system in which XPOS and YPOS are
given.
Capital letters are 4/6 as wide as a blank and, by default,
7/4 as high as they are wide (the internal parameter ´HW´
may be used to change the latter value). The distance from the center of
each character to the center of the next is constant and is equal to one
blank width.
Note that, if the desired character height ("h") is
known, one should use SIZE = (6/7) * h.
SIZE is defined in such a way as to be consistent with PCHIQU.
If one changes a "CALL PCHIQU" to a "CALL PCMEQU"
(assuming that no function codes are used in the string, of course), the
results will be much the same, but the length of the string will be
different. If one uses SIZE less than zero and one has reset the PCHIQU
internal parameter ´PW´ to something other than 16, the
difference in the output of the two routines will be greater.
- ANGD
- (an input expression of type REAL) is the angle, in degrees
counterclockwise from the positive X axis, at which the character string
is to be written.
- CNTR
- (an input expression of type REAL) is the centering option, as
follows:
- CNTR = -1. means that (XPOS,YPOS) is the center of the left edge of the
first character.
- CNTR = 1. means that (XPOS,YPOS) is the center of the right edge of the
last character.
- CNTR = s means that (XPOS,YPOS) is a point obtained by linear
interpolation along the line joining the two points mentioned above (the
first point being associated with the value -1 and the second with the
value +1). The value "0." gives the midpoint of the line.
-
- Upon return from PCMEQU, all arguments are unchanged.
The C-binding argument descriptions are the same as the FORTRAN
argument descriptions.
Use the ncargex command to see the following relevant examples:
cbex01, epltch, spset1, spset2, tpltch.
To use PCMEQU or c_pcmequ, load the NCAR Graphics libraries ncarg,
ncarg_gks, and ncarg_c, preferably in that order.
Online: plotchar, pcdlsc, pcgetc, pcgeti, pcgetr, pchiqu, pcloqu,
pcmpxy, pcpnwi, pcrset, pcsetc, pcseti, pcsetr, ncarg_cbind.
Hardcopy: NCAR Graphics Fundamentals, UNIX Version
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.