1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)aed.h 5.1 (Berkeley) 04/30/85 7 */ 8 9 /* 10 * Displays plot files on an AED512 graphics terminal. 11 */ 12 13 #include <stdio.h> 14 #include <sgtty.h> 15 16 extern char dbuf[BUFSIZ]; /* Used to buffer display characters */ 17 extern struct sgttyb sgttyb; /* Used to save terminal control bits */ 18 extern curx, cury; /* Current screen position */ 19 extern int xbot, ybot; /* Coordinates of screen lower-left corner */ 20 extern int scale; /* The number of pixels per 2**12 units 21 * of world coordinates. 22 */ 23 24 /* The following variables describe the screen. */ 25 26 #define GRXMAX 511 /* Maximum x-coordinate of screen */ 27 #define GRYMAX 482 /* Maximum y-coordinate of screen */ 28