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#ifndef lint |
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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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#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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|
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|
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#include "meta.h" |
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|
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|
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#define ratio 1/3 |
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|
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|
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char *progname; |
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|
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int nbranch; |
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|
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|
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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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|
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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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|
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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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} |
