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greg |
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#ifndef lint
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schorsch |
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static const char RCSid[] = "$Id: gentree.c,v 1.1 2003/02/22 02:07:26 greg Exp $";
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greg |
1.1 |
#endif
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/*
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* gentree.c - program to generate 2-D Christmas trees.
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*
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* 12/4/85
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*
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* cc gentree.c libmeta.a
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*/
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#include "meta.h"
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#define ratio 1/3
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char *progname;
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int nbranch;
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main(argc, argv)
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int argc;
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char *argv[];
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{
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progname = argv[0];
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if (argc != 7) {
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sprintf(errmsg, "Usage: %s x0 y0 x1 y1 nbranch depth", progname);
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error(USER, errmsg);
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}
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nbranch = atoi(argv[5]);
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gentree(atoi(argv[1]), atoi(argv[2]),
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atoi(argv[3]), atoi(argv[4]), atoi(argv[6]));
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pglob(PEOP, 0200, NULL);
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writeof(stdout);
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exit(0);
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}
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gentree(x0, y0, x1, y1, depth)
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int x0, y0, x1, y1, depth;
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{
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int xstart, ystart;
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int xend, yend;
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register int i;
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plseg(0, x0, y0, x1, y1);
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if (depth <= 0)
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return;
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for (i = 1; i < nbranch+1; i++) {
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xstart = (x1-x0)*(long)i/(nbranch+2)+x0;
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ystart = (y1-y0)*(long)i/(nbranch+2)+y0;
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xend = xstart+(x1-x0)/(nbranch+2);
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yend = ystart+(y1-y0)/(nbranch+2);
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gentree(xstart, ystart,
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xend+(y1-yend)*ratio, yend+(xend-x1)*ratio,
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depth-1);
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gentree(xstart, ystart,
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xend+(yend-y1)*ratio, yend+(x1-xend)*ratio,
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depth-1);
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}
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}
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