Isosurface_params - This document briefly describes all Isosurface
internal parameters.
Parameter descriptions, in alphabetical order, of all Isosurface
internal parameters follow. Each description begins with a line giving the
parameter name and the intrinsic FORTRAN type of the parameter.
- 'IU' - Integer
- Number of extra slabs to be interpolated between each pair of slabs
perpendicular to the U axis. Using a non-zero value takes longer, but
makes a better picture. Negate the value to interpolate the extra slabs
but not draw them, which has the effect of reducing errors due to being
able to see between slabs. Attempting to give 'IU' a value less than -10
will give it the value -10; similarly, trying to give it a value greater
than 10 will give it the value 10. The default value is 0.
- 'IV' - Integer
- Like 'IU', but applies to extra slabs perpendicular to the V axis. The
default value is 0.
- 'IW' - Integer
- Like 'IU', but applies to extra slabs perpendicular to the W axis. The
default value is 0.
- 'RF' - Integer
- Controls drawing of reference planes and axes. Zero means "don't draw
them"; non-zero means "draw them". The default value is
1.
- 'RS' - Real
- Zero turns off the "relative size" feature; the 3D grid box will
be scaled to fill almost the entire plotter frame. Give 'RS' a non-zero
value to turn on the "relative size" feature and to specify that
distance from which the box, when viewed from the direction which makes
its image largest, almost fills the frame. Views from closer in will give
a bigger image and views from farther out will give a smaller image. This
is useful when making movies with the "camera" flying around the
box. The default value is 0.
- 'SL' - Real
- Segment length. When contours are smoothed, this parameter specifies the
approximate length of the line segments used to draw the smooth curves.
Values outside the range from 0.0001 to 0.1 will be mapped to the nearer
end of that range. The default value is 0.01.
- 'SM' - Integer
- Screen model selector. Zero selects the coarse screen model (128 x 128);
non-zero selects a finer screen model (256 x 256). Using the former is
faster, but using the latter gives better pictures. The default value is
0.
- 'ST' - Real
- Spline tension. If zero, turns off the smoothing of contours. If non-zero,
turns the smoother on and determines the tension on the splines used to do
the smoothing. Use of values greater than about 15. has been observed to
cause overflow on some machines. The default value is 0.
- 'SV' - Integer
- Special value. The value zero turns off the special-value feature. A
non-zero value turns on the feature and specifies the special value
itself. Regions filled with this value are treated as being outside the
volume bounded by the isosurface. Preliminary experiments seem to indicate
that sometimes the use of special values works well and sometimes it
doesn't (depending on the pattern of the special values in the field). The
default value is 0.
- 'VB' - Real
- The position of the bottom edge of the viewport in which the isosurface is
to be displayed, expressed as a fraction between 0 (the bottom edge of the
frame) and 1 (the top edge of the frame). The default value is 0.
- 'VL' - Real
- The position of the left edge of the viewport in which the isosurface is
to be displayed, expressed as a fraction between 0 (the left edge of the
frame) and 1 (the right edge of the frame). The default value is 0.
- 'VR' - Real
- The position of the right edge of the viewport in which the isosurface is
to be displayed, expressed as a fraction between 0 (the left edge of the
frame) and 1 (the right edge of the frame). The default value is 1.
- 'VT' - Real
- The position of the top edge of the viewport in which the isosurface is to
be displayed, expressed as a fraction between 0 (the bottom of the frame)
and 1 (the top edge of the frame). The default value is 1.
Online: isgeti, isgetr, isseti, issetr
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.