1 /* aed.h 4.1 83/11/11 */ 2 /* 3 * Displays plot files on an AED512 graphics terminal. 4 */ 5 6 #include <stdio.h> 7 #include <sgtty.h> 8 9 extern char dbuf[BUFSIZ]; /* Used to buffer display characters */ 10 extern struct sgttyb sgttyb; /* Used to save terminal control bits */ 11 extern curx, cury; /* Current screen position */ 12 extern int xbot, ybot; /* Coordinates of screen lower-left corner */ 13 extern int scale; /* The number of pixels per 2**12 units 14 * of world coordinates. 15 */ 16 17 /* The following variables describe the screen. */ 18 19 #define GRXMAX 511 /* Maximum x-coordinate of screen */ 20 #define GRYMAX 482 /* Maximum y-coordinate of screen */ 21