ncl_surface_params man page

Surface_params — This document briefly describes the Surface internal parameters.

Description

There are no parameter access routines available for the Surface utility. Therefore, parameters must be set through the common blocks SRFBLK and SRFIP1.

In order to access the internal parameters, you must declare the following common blocks for the Surface parameters in your code.

 COMMON /SRFBLK/ LIMU(1024) ,LIML(1024) ,CL(41)     ,NCL        ,
1                LL         ,FACT       ,IROT       ,NDRZ       ,
2                NUPPER     ,NRSWT      ,BIGD       ,UMIN       ,
3                UMAX       ,VMIN       ,VMAX       ,RZERO      ,
4                IOFFP      ,NSPVAL     ,SPVAL      ,BIGEST
 COMMON /SRFIP1/ IFR        ,ISTP       ,IROTS      ,IDRX       ,
1                IDRY       ,IDRZ       ,IUPPER     ,ISKIRT     ,
2                NCLA       ,THETA      ,HSKIRT     ,CHI        ,
3                CLO        ,CINC       ,ISPVAL

Note that not all of the variables declared above are considered user-modifiable parameters. Definitions of only user-modifiable parameters follow:

IFR
    -1   Call FRAME first.

 0   Do not call FRAME.

+1   Call FRAME when done (default).

ISTP
    -1   Draws alternating frames, slightly offset 

     (For movies, IROTS = 0).
 0   Blank frame between for stereo slide (IROTS = 1)

     (default).

+1   Both on same frame. (left picture to left 

     side. IROTS = 0).
     

IROTS
     0   +Z in vertical plotting direction (CINE mode)

     (default).

+1   +Z in horizontal plotting direction (COMIC mode).

IDRX
    +1   Draw lines of constant X (default).

 0   Do not.

IDRY
    +1   Draw lines of constant Y (default).

 0   Do not.

IDRZ
    +1   Draw lines of constant Z (contour lines).

 0   Do not (default).

IUPPER
    +1   Draw upper side of surface.

 0   Draw both sides (default).

-1   Draw lower side.

ISKIRT
    +1   Draw a skirt around the surface.

     BOTTOM = HSKIRT.

 0   Do not (default).

NCLA
         Approximate number of levels of constant Z

     that are drawn if levels are not specified.

     40 is the maximum and 6 is the default.

THETA
         The angle in radians between eyes for stereo pairs.

     The default is .02.

HSKIRT
         Height of skirt (if ISKIRT = 1). The default is 0.

CHI
         Highest level of constant Z. The default is 0.

CLO
         Lowest level of constant Z. The default is 0.

CINC
         Increment between levels. The default is 0.

IOFFP
         Flag to control the use of the special value feature. Do

     not have both IOFFP=1 and ISKIRT=1.

 0   Feature not in use (default).

+1   Feature in use.  No lines are drawn to data points

     that are equal to SPVAL.

SPVAL
         Special value used to mark unknown data when 

     IOFFP=1.  The default is 0.

See Also

Online: surface, ezsrfc, pwrzs, setr, srface. ncarg_cbind.

Hardcopy: NCAR Graphics Fundamentals, UNIX Version

Info

March 1993 UNIX NCAR GRAPHICS