ncl_gsvp man page

GSVP (Set viewport) — establishes a rectangular subspace of  normalized device coordinates space. Calls to GSVP are  discouraged with NCAR Graphics. Instead, use the SET  subroutine because SET also supports mirror imaging and log  scaling of axes.

Synopsis

CALL GSVP (TRNUM, XMIN, XMAX, YMIN, YMAX)

C-Binding Synopsis

#include <ncarg/gks.h>

void gset_vp(Gint tran_num, const Glimit *vp_limits);

Description

TRNUM

(Integer, Input) - A normalization transformation  number. The number of available transformations is implementation  specific. In the case of NCAR GKS-0A, two normalization  transformations are provided:

0

Selects the identity transformation in which both the  window and viewport have the range of 0. to 1. in both  coordinate directions.  This is the default normalization transformation for  GKS. It is also fixed within GKS; that is, it is illegal to call GSVP  with TRNUM = 0.

1

A normalization transformation in which the viewport is defined  by XMIN to XMAX and YMIN to YMAX.

XMIN

(Real, Input) - The left horizontal coordinate of  the viewport.

XMAX

(Real, Input) - The right horizontal coordinate of  the viewport. 0. ≤ XMIN < XMAX ≤ 1.

YMIN

(Real, Input) - The bottom vertical coordinate of  the viewport.

YMAX

(Real, Input) - The top vertical coordinate of the  viewport. 0. ≤ YMIN < YMAX ≤ 1.

Defaults:

TRNUM = 0, XMIN = 0.0, XMAX = 1.0, YMIN = 0.0, YMAX = 1.0

Access

To use GKS routines, load the NCAR GKS-0A library  ncarg_gks.

See Also

Online:  set, gswn, gselnt, gqclip, gset_vp

Hardcopy: NCAR Graphics Fundamentals, UNIX Version; User's Guide for NCAR GKS-0A Graphics

Info

14 January 1992 UNIX NCAR GRAPHICS