Name:         GRTXY0

Purpose:      convert world coordinates to device coordinates

Category:     GRAPHICS

File:         pgplot.src

Author:       T.J. Pearson

Use:          see description below.

Description:

            SUBROUTINE GRTXY0 (ABSXY,X,Y,XT,YT)
      
       GRPCKG (internal routine): Convert scaled position to absolute
       position.
      
       Arguments:
      
       ABSXY (input, logical): if FALSE, convert world coordinates to
             absolute device coordinates; if TRUE, return the input
             coordinates unchanged.
       X, Y (input, real): input coordinates (absolute or world, depending
             on setting of ABSXY).
       XT, YT (output, real): output absolute device coordinates.

Updates:      Oct 16, 1998: JPT automatically extracted from source.