1Isosrfhr(3NCARG) NCAR GRAPHICS Isosrfhr(3NCARG)
2
6 Isosrfhr - Draws a wireframe surface with hidden contours removed.
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9 Isosrfhr is obsolete.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 It has been replaced by the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".
13 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.
17
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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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.
36 An Isosrfhr example of the logical structure of a program follows:
38 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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62 To use Isosrfhr, load the NCAR Graphics libraries ncarg, ncarg_gks, and
63 ncarg_c, preferably in that order.
64
66 Online: init3d, dandr, isosurface, isosurface_params, ezisos, isgeti,
67 isgetr, isosrf, isseti, issetr, pwrzi, ncarg_cbind
68 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) 1987-2007
74 University Corporation for Atmospheric Research
75 This documentation is free software; you can redistribute it and/or
77 modify it under the terms of the GNU General Public License as
78 published by the Free Software Foundation; either version 2 of the
79 License, or (at your option) any later version.
80 This software is distributed in the hope that it will be useful, but
82 WITHOUT ANY WARRANTY; without even the implied warranty of
83 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
84 General Public License for more details.
85 You should have received a copy of the GNU General Public License along
87 with this software; if not, write to the Free Software Foundation,
88 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
89UNIX March 1993 Isosrfhr(3NCARG)