1PWRZT(3NCARG) NCAR GRAPHICS PWRZT(3NCARG)
2
6 PWRZT - Draws the projections of character strings that are positioned
7 in a plane parallel to one of the three coordinate planes.
8
10 CALL PWRZT (U,V,W,CHRS,LCHRS,ISIZE,IDIR,ITOP,ICEN)
11
13 #include <ncarg/ncargC.h>
14 void c_pwrzt (float u, float v, float w, char *chrs, int lchrs,
16 int isize, int idir, int itop, int icen)
17
19 U,V,W (input expressions of type REAL) are the U, V, and W
20 coordinates of a point, in the user's 3-space, relative to
21 which the character string is to be positioned.
22 CHRS (an input constant or variable of type CHARACTER) is the
24 character string to be drawn. It may contain uppercase
25 alphabetic characters, the digits 0 through 9, and a small
26 set of "special" characters (plus, minus, asterisk, slash,
27 left and right parentheses, equals sign, blank, comma, and
28 period). Other characters are treated as blanks. (Note
29 especially that lowercase alphabetic characters are not
30 available.)
31 LCHRS (an input expression of type INTEGER) is the number of
33 characters in CHRS.
34 ISIZE (an input expression of type INTEGER) specifies the
36 character width to be used, defined in terms of the width
37 of the plotter frame. Because projected characters vary in
38 width depending on just where they are placed within the
39 box being viewed and the position from which that box is
40 viewed, ISIZE is interpreted as specifying the width of a
41 character when that character is positioned and viewed in
42 such a way as to make it as large as it could possibly be -
43 when the character is on the near side of the box and in a
44 plane perpendicular to the line of sight. Specifically,
45 If between 0 and 3, ISIZE is 1., 1.5, 2., or 3. times a
47 standard width equal to 1/128th of the screen width.
48 If greater than 3, ISIZE is the character width in
50 units of 1/1024th of the plotter frame.
51 One third of the "width" referred to here is white space.
53 What ISIZE really specifies is the distance between the
54 centers of adjacent characters in a string. Characters are
55 digitized to be 7/6 * ISIZE units high and 4/6 * ISIZE
56 units wide, excluding white space.
57 IDIR (an input expression of type INTEGER) is the direction in
59 which the character string is to be written, as follows:
60 1 = +U -1 = -U
62 2 = +V -2 = -V
64 3 = +W -3 = -W
66 ITOP (an input expression of type INTEGER) is the direction from
68 the center of the first character to the top of the first
69 character; possible values of ITOP are the same as those of
70 IDIR, above. ABS(ITOP) must not be equal to ABS(IDIR).
71 ICEN (an input expression of type INTEGER) is the centering
73 option, specifying where (U,V,W) is relative to the string
74 written, as follows:
75 -1 (U,V,W) is the center of the left edge of the first
77 character.
78 0 (U,V,W) is the center of the entire string.
80 1 (U,V,W) is the center of the right edge of the last
82 character.
83 Because characters drawn by PWRZT are stroked using the GKS polyline
85 primitive (so that they can be projected from 3-D to 2-D), they are
86 drawn in the current polyline color, as determined by the last call to
87 the GKS routine GSPLCI; by default, color index 1 is used. Line width
88 is determined by the last call to the GKS routine GSLWSC; by default,
89 the line width scale factor is 1.
90
92 The C-binding argument descriptions are the same as the FORTRAN
93 argument descriptions.
94
96 Use the ncargex command to see the following relevant examples: tpwrzt,
97 fthex01, fthex02, fthex03, fthex04, fthex05.
98
100 To use PWRZT or c_pwrzt, load the NCAR Graphics libraries ncarg,
101 ncarg_gks, and ncarg_c, preferably in that order.
102
104 Online: threed, curve3, fence3, frst3, line3, perim3, point3, psym3,
105 pwrz, set3, threed, tick3, tick43, vect3, ncarg_cbind.
106 Hardcopy: NCAR Graphics Fundamentals, UNIX Version
108
110 Copyright (C) 1987-2009
111 University Corporation for Atmospheric Research
112 The use of this Software is governed by a License Agreement.
113UNIX March 1993 PWRZT(3NCARG)