Return to space.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / usr.lib / libplot / aed

Annotation of 43BSDTahoe/usr.lib/libplot/aed/space.c, revision 1.1.1.1

1.1       root        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: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.