usr/src/lib/libplot/dumb/dumb.h

/*      dumb.h  4.1     83/11/10        */
/*
 * This accepts plot file formats and produces the appropriate plots
 * for dumb terminals.  It can also be used for printing terminals and
 * lineprinter listings, although there is no way to specify number of
 * lines and columns different from your terminal.  This would be easy
 * to change, and is left as an exercise for the reader.
 */

#include <math.h>

#define scale(x,y) y = LINES-1-(LINES*y/rangeY +minY); x = COLS*x/rangeX + minX

extern int minX, rangeX;        /* min and range of x */
extern int minY, rangeY;        /* min and range of y */
extern int currentx, currenty;
extern int COLS, LINES;

/* A very large screen! (probably should use malloc) */
#define MAXCOLS         132
#define MAXLINES        90

extern char screenmat[MAXCOLS][MAXLINES];