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

6       Isosrfhr - Draws a wireframe surface with hidden contours removed.
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STATUS

9       Isosrfhr is obsolete.  It was written to do one contour plane at a time
10       when computers had small memories.  It has been replaced by the
11       Isosurface utility.  For a description of Isosurface: type "man
12       isosurface".
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14       Isosrfhr continues to be provided for compatibility of early NCAR
15       Graphics codes.  If you are writing new code, we suggest that you use
16       Isosurface.
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SYNOPSIS

19       DANDR - Draws the contours represented by a single U plane.  The
20       calling program must loop over the number of U planes (NU) which
21       routine INIT3D has stored on a scratch file.
22       INIT3D - Transforms the VW grids (NU of them) into a series of 2-D
23       perspectives which are stored on a file.  Entry INIT3D must be called
24       before the entry DANDR is called for the first time.
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USAGE

27       Entries INIT3D and DANDR must be used in tandem to create a plot.
28       First call entry INIT3D to create a set of 2-D perspective planes which
29       are output to a scratch file.  Then, in the calling program you must
30       loop over the U dimension of UVW space starting at the last slab, NU,
31       and moving forward to slab 1.  Initially set all elements of IOBJS to
32       zeros.  Then, at all locations (J,K) where the surface of an object
33       would appear, set IOBJS(J,K) = 1.  When IOBJS(J,K) has been defined for
34       that VW slab (U = NU - I + 1), call the entry DANDR, which draws any
35       object contours based on the 2-D perspective defined for that slab.
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37       An Isosrfhr example of the logical structure of a program follows:
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39        C  Entry INIT3D writes NU 2-D perspective planes, ST1(NV,NW,2),
40        C   of the UVW grid, viewed from the position EYE, to a scratch file.
41        C
42             CALL INIT3D(EYE,NU,NV,NW,ST1,LX,NY,IS2,IU,S)
43        C
44        C NU is the extent of the U dimension.
45        C
46             DO 1 IBKWDS = 1,NU
47             I = NU+1-IBKWDS
48        C
49        C You must define the presence of the objects at each VW grid point for
50        C all slabs in the U direction. Ones are used to indicate the presence
51        C of an object.  Zeros indicate no object.
52        C
53        C      IF (OBJ.EQ.YES) IOBJS(J,K) = 1
54        C      IF (OBJ.EQ.NO)  IOBJS(J,K) = 0
55        C
56        C  DANDR reads ST1(NV,NW,2) for slab I.
57        C
58           1 CALL DANDR(NV,NW,ST1,LX,NX,NY,IS2,IU,S,IOBJS,MV)
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ACCESS

62       To use Isosrfhr, load the NCAR Graphics libraries ncarg, ncarg_gks, and
63       ncarg_c, preferably in that order.
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SEE ALSO

66       Online: init3d, dandr, isosurface, isosurface_params, ezisos, isgeti,
67       isgetr, isosrf, isseti, issetr, pwrzi, ncarg_cbind
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69       Hardcopy: NCAR Graphics Contouring and Mapping Tutorial; NCAR Graphics
70       Fundamentals, UNIX Version; User's Guide for NCAR GKS-0A Graphics
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73       Copyright (C) 1987-2009
74       University Corporation for Atmospheric Research
75       The use of this Software is governed by a License Agreement.
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79UNIX                              March 1993                  Isosrfhr(3NCARG)
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