1Isosurface(3NCARG)               NCAR GRAPHICS              Isosurface(3NCARG)
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NAME

6       Isosurface - Allows the user to draw a perspective view of the surface
7       defined by the equation f(u,v,w)=fiso, where the function f is
8       approximated by a 3-dimensional array of data and fiso is a user-
9       specified "isovalue". Contours created by taking slices in any of three
10       directions through the surface are drawn with hidden portions of the
11       contour lines removed.
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SYNOPSIS

14       EZISOS - May be called to draw an isosurface.
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16       ISOSRF - May be called to draw an isosurface.
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18       ISGETI - Retrieves the current values of various internal parameters
19       affecting the behavior of ISOSRF.
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21       ISGETR - Retrieves the current values of various internal parameters
22       affecting the behavior of ISOSRF.
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24       ISSETI - Gives new values to internal parameters.
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26       ISSETR - Gives new values to internal parameters.
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28       PWRZI - Plots characters in three-space when using ISOSRF.
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C-BINDING SYNOPSIS

31       c_ezisos,
32       c_isosrf,
33       c_isgeti,
34       c_isgetr,
35       c_isseti,
36       c_issetr,
37       c_pwrzi
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USER-MODIFIABLE INTERNAL ROUTINES

40       None.
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ACCESS

43       To use Isosurface, load the NCAR Graphics libraries ncarg, ncarg_gks,
44       and ncarg_c, preferably in that order.
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MESSAGES

47       The error messages described below can be written to the output unit by
48       routines in the package Isosurface.  All of these errors are fatal and
49       cause the user's program to terminate execution (on the other hand, all
50       of the errors are easily avoided).
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52       ISGETI OR ISGETR - PARAMETER NAME TOO SHORT - x
53                   The argument "PNAM", in a call to ISGETI or ISGETR, is only
54                   one character long.
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56       ISGETI OR ISGETR - PARAMETER NAME NOT KNOWN - xx
57                   The argument "PNAM", in a call to ISGETI or ISGETR, begins
58                   with two characters that do not constitute one of the legal
59                   internal parameter names described in the man page
60                   isosurface_params.
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62       ISSETI OR ISSETR - PARAMETER NAME TOO SHORT - x
63                   The argument "PNAM", in a call to ISSETI or ISSETR, is only
64                   one character long.
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66       ISSETI OR ISSETR - PARAMETER NAME NOT KNOWN - xx
67                   The argument "PNAM", in a call to ISSETI or ISSETR, begins
68                   with two characters that do not constitute one of the legal
69                   internal parameter names described in the man page
70                   isosurface_params.
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72       ISINIT - INSTALLATION OF ISOSRF IMPROPERLY DONE
73                   This error message means that the screen models used to do
74                   hidden-line removal have been found to be improperly
75                   dimensioned for the system on which the code is being run.
76                   About the only way this can happen is if the distributed
77                   code is run on a a machine with sixteen-bit words or if the
78                   distributed code has been modified incorrectly.
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SEE ALSO

81       Online: isosurface_params, ezisos, isgeti, isgetr, isosrf, isseti,
82       issetr, pwrzi, ncarg_cbind
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84       Hardcopy: NCAR Graphics Fundamentals, UNIX Version
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87       Copyright (C) 1987-2009
88       University Corporation for Atmospheric Research
89       The use of this Software is governed by a License Agreement.
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93UNIX                              March 1993                Isosurface(3NCARG)
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