Name: GRSYXD Purpose: obtain the polyline representation of a given symbol Category: GRAPHICS File: pgplot.src Author: T.J. Pearson Use: see description below. Description: SUBROUTINE GRSYXD (SYMBOL, XYGRID, UNUSED) INTEGER SYMBOL INTEGER XYGRID(300) LOGICAL UNUSED Return the digitization coordinates of a character. Each character is defined on a grid with X and Y coordinates in the range (-49,49), with the origin (0,0) at the center of the character. The coordinate system is right-handed, with X positive to the right, and Y positive upward. Arguments: SYMBOL (input) : symbol number in range (1..3000). XYGRID (output) : height range, width range, and pairs of (x,y) coordinates returned. Height range = (XYGRID(1), XYGRID(3)). Width range = (XYGRID(4),XYGRID(5)). (X,Y) = (XYGRID(K),XYGRID(K+1)) (K=6,8,...). UNUSED (output) : receives .TRUE. if SYMBOL is an unused symbol number. A character of normal height and zero width is returned. Receives .FALSE. if SYMBOL is a valid symbol number. The height range consists of 3 values: (minimum Y, baseline Y, maximum Y). The first is reached by descenders on lower-case g, p, q, and y. The second is the bottom of upper-case letters. The third is the top of upper-case letters. A coordinate pair (-64,0) requests a pen raise, and a pair (-64,-64) terminates the coordinate list. It is assumed that movement to the first coordinate position will be done with the pen raised - no raise command is explicitly included to do this. Updates: Oct 16, 1998: JPT automatically extracted from source.