Name:         GRCLIP

Purpose:      clip a point against clipping rectangle

Category:     GRAPHICS

File:         pgplot.src

Author:       T.J. Pearson

Use:          see description below.

Description:

            SUBROUTINE GRCLIP (X,Y,XMIN,XMAX,YMIN,YMAX,C)
            REAL X,Y
            REAL XMIN,XMAX,YMIN,YMAX
            INTEGER C
      
       GRPCKG (internal routine): support routine for the clipping algorithm;
       called from GRLIN0 only. C is a 4 bit code indicating the relationship
       between point (X,Y) and the window boundaries; 0 implies the point is
       within the window.
      
       Arguments:

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