# 2.11BSD#431 - /usr/src/usr.lib/libplot/aed/space.c

##### Functions

    space             X

       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:
       7: #ifndef lint
       8: static char sccsid[] = "@(#)space.c	5.2 (Berkeley) 4/30/85";
       9: #endif not lint
      10:
      11:
      12: #include "aed.h"
      13:
      14: /*---------------------------------------------------------
      15:  *	Space sets up the world-to-screen transformation so
      16:  *	that the rectangular area described by (x0, y0) and
      17:  *	(x1, y1) will all be on-screen.
      18:  *
      19:  *	Results:	None.
      20:  *
      21:  *	Side Effects:
      22:  *	Our own variables scale, xbot, and ybot are changed.
      23:  *---------------------------------------------------------
      24:  */
      25: space(x0, y0, x1, y1)
      26: int x0, y0, x1, y1;
      27: {
      28:     int xscale, yscale, xsize, ysize;
      29:     xscale = (GRXMAX<<12)/(x1-x0);
      30:     yscale = (GRYMAX<<12)/(y1-y0);
      31:     if (xscale > yscale) scale = yscale;
      32:     else scale = xscale;
      33:     scale = (scale*9)/10 - 1;
      34:     if (scale<1) scale = 1;
      35:     xsize = (2048*GRXMAX)/scale + 1;
      36:     xbot = (x1+x0)/2 - xsize;
      37:     ysize = (2048*GRYMAX)/scale + 1;
      38:     ybot = (y1+y0)/2 - ysize;
      39: }

#### Defined functions

space defined in line 25; never used

#### Defined variables

sccsid defined in line 8; never used

Last modified: 1987-02-18 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 421 |