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

6       Surface_params - This document briefly describes the Surface internal
7       parameters.
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DESCRIPTION

10       There are no parameter access routines available for the Surface
11       utility.  Therefore, parameters must be set through the common blocks
12       SRFBLK and SRFIP1.
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14       In order to access the internal parameters, you must declare the
15       following common blocks for the Surface parameters in your code.
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17        COMMON /SRFBLK/ LIMU(1024) ,LIML(1024) ,CL(41)     ,NCL        ,
18       1                LL         ,FACT       ,IROT       ,NDRZ       ,
19       2                NUPPER     ,NRSWT      ,BIGD       ,UMIN       ,
20       3                UMAX       ,VMIN       ,VMAX       ,RZERO      ,
21       4                IOFFP      ,NSPVAL     ,SPVAL      ,BIGEST
22        COMMON /SRFIP1/ IFR        ,ISTP       ,IROTS      ,IDRX       ,
23       1                IDRY       ,IDRZ       ,IUPPER     ,ISKIRT     ,
24       2                NCLA       ,THETA      ,HSKIRT     ,CHI        ,
25       3                CLO        ,CINC       ,ISPVAL
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27       Note that not all of the variables declared above are considered user-
28       modifiable parameters.  Definitions of only user-modifiable parameters
29       follow:
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33       IFR         -1   Call FRAME first.
34                    0   Do not call FRAME.
35                   +1   Call FRAME when done (default).
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39       ISTP        -1   Draws alternating frames, slightly offset
40                        (For movies, IROTS = 0).
41                    0   Blank frame between for stereo slide (IROTS = 1)
42                        (default).
43                   +1   Both on same frame. (left picture to left
44                        side. IROTS = 0).
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48       IROTS
49                    0   +Z in vertical plotting direction (CINE mode)
50                        (default).
51                   +1   +Z in horizontal plotting direction (COMIC mode).
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55       IDRX        +1   Draw lines of constant X (default).
56                    0   Do not.
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59       IDRY        +1   Draw lines of constant Y (default).
60                    0   Do not.
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63       IDRZ        +1   Draw lines of constant Z (contour lines).
64                    0   Do not (default).
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67       IUPPER      +1   Draw upper side of surface.
68                    0   Draw both sides (default).
69                   -1   Draw lower side.
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72       ISKIRT      +1   Draw a skirt around the surface.
73                        BOTTOM = HSKIRT.
74                    0   Do not (default).
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77       NCLA
78                        Approximate number of levels of constant Z
79                        that are drawn if levels are not specified.
80                        40 is the maximum and 6 is the default.
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83       THETA
84                        The angle in radians between eyes for stereo pairs.
85                        The default is .02.
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88       HSKIRT
89                        Height of skirt (if ISKIRT = 1). The default is 0.
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92       CHI
93                        Highest level of constant Z. The default is 0.
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96       CLO
97                        Lowest level of constant Z. The default is 0.
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100       CINC
101                        Increment between levels. The default is 0.
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104       IOFFP
105                        Flag to control the use of the special value feature. Do
106                        not have both IOFFP=1 and ISKIRT=1.
107                    0   Feature not in use (default).
108                   +1   Feature in use.  No lines are drawn to data points
109                        that are equal to SPVAL.
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112       SPVAL
113                        Special value used to mark unknown data when
114                        IOFFP=1.  The default is 0.
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SEE ALSO

118       Online: surface, ezsrfc, pwrzs, setr, srface.  ncarg_cbind.
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120       Hardcopy: NCAR Graphics Fundamentals, UNIX Version
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123       Copyright (C) 1987-2009
124       University Corporation for Atmospheric Research
125       The use of this Software is governed by a License Agreement.
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129UNIX                              March 1993            Surface_params(3NCARG)
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