1Isosurface_params(3NCARG) NCAR GRAPHICS Isosurface_params(3NCARG)
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6 Isosurface_params - This document briefly describes all Isosurface
7 internal parameters.
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10 Parameter descriptions, in alphabetical order, of all Isosurface
11 internal parameters follow. Each description begins with a line giving
12 the parameter name and the intrinsic FORTRAN type of the parameter.
13 'IU' - Integer
15 Number of extra slabs to be interpolated between each pair of
16 slabs perpendicular to the U axis. Using a non-zero value takes
17 longer, but makes a better picture. Negate the value to
18 interpolate the extra slabs but not draw them, which has the
19 effect of reducing errors due to being able to see between
20 slabs. Attempting to give 'IU' a value less than -10 will give
21 it the value -10; similarly, trying to give it a value greater
22 than 10 will give it the value 10. The default value is 0.
23 'IV' - Integer
25 Like 'IU', but applies to extra slabs perpendicular to the V
26 axis. The default value is 0.
27 'IW' - Integer
29 Like 'IU', but applies to extra slabs perpendicular to the W
30 axis. The default value is 0.
31 'RF' - Integer
33 Controls drawing of reference planes and axes. Zero means "don't
34 draw them"; non-zero means "draw them". The default value is 1.
35 'RS' - Real
37 Zero turns off the "relative size" feature; the 3D grid box will
38 be scaled to fill almost the entire plotter frame. Give 'RS' a
39 non-zero value to turn on the "relative size" feature and to
40 specify that distance from which the box, when viewed from the
41 direction which makes its image largest, almost fills the frame.
42 Views from closer in will give a bigger image and views from
43 farther out will give a smaller image. This is useful when
44 making movies with the "camera" flying around the box. The
45 default value is 0.
46 'SL' - Real
48 Segment length. When contours are smoothed, this parameter
49 specifies the approximate length of the line segments used to
50 draw the smooth curves. Values outside the range from 0.0001 to
51 0.1 will be mapped to the nearer end of that range. The default
52 value is 0.01.
53 'SM' - Integer
55 Screen model selector. Zero selects the coarse screen model (128
56 x 128); non-zero selects a finer screen model (256 x 256). Using
57 the former is faster, but using the latter gives better
58 pictures. The default value is 0.
59 'ST' - Real
61 Spline tension. If zero, turns off the smoothing of contours. If
62 non-zero, turns the smoother on and determines the tension on
63 the splines used to do the smoothing. Use of values greater than
64 about 15. has been observed to cause overflow on some machines.
65 The default value is 0.
66 'SV' - Integer
68 Special value. The value zero turns off the special-value
69 feature. A non-zero value turns on the feature and specifies the
70 special value itself. Regions filled with this value are treated
71 as being outside the volume bounded by the isosurface.
72 Preliminary experiments seem to indicate that sometimes the use
73 of special values works well and sometimes it doesn't (depending
74 on the pattern of the special values in the field). The default
75 value is 0.
76 'VB' - Real
78 The position of the bottom edge of the viewport in which the
79 isosurface is to be displayed, expressed as a fraction between 0
80 (the bottom edge of the frame) and 1 (the top edge of the
81 frame). The default value is 0.
82 'VL' - Real
84 The position of the left edge of the viewport in which the
85 isosurface is to be displayed, expressed as a fraction between 0
86 (the left edge of the frame) and 1 (the right edge of the
87 frame). The default value is 0.
88 'VR' - Real
90 The position of the right edge of the viewport in which the
91 isosurface is to be displayed, expressed as a fraction between 0
92 (the left edge of the frame) and 1 (the right edge of the
93 frame). The default value is 1.
94 'VT' - Real
96 The position of the top edge of the viewport in which the
97 isosurface is to be displayed, expressed as a fraction between 0
98 (the bottom of the frame) and 1 (the top edge of the frame). The
99 default value is 1.
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102 Online: isgeti, isgetr, isseti, issetr
103 Hardcopy: NCAR Graphics Fundamentals, UNIX Version
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107 Copyright (C) 1987-2009
108 University Corporation for Atmospheric Research
109 The use of this Software is governed by a License Agreement.
110UNIX March 1993 Isosurface_params(3NCARG)