NAME

       Isosurface_params - This document briefly describes all Isosurface internal parameters.

DESCRIPTION

       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.

SEE ALSO

       Online: isgeti, isgetr, isseti, issetr

       Hardcopy: NCAR Graphics Fundamentals, UNIX Version

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.