晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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/* computes the bounding box of a graph based on its nodes
taking into account clusters and node sizes.
*/
BEGIN {
double x, y, w2, h2;
double llx, lly, urx, ury;
double llx0, lly0, urx0, ury0;
graph_t clustBB (graph_t G) {
graph_t sg;
for (sg = fstsubg(G); sg; sg = nxtsubg(sg)) {
sg = clustBB(sg);
}
if (G.name == "cluster*") {
sscanf (G.bb, "%lf,%lf,%lf,%lf", &llx0, &lly0, &urx0, &ury0);
if (llx0 < llx) llx = llx0;
if (lly0 < lly) lly = lly0;
if (urx0 > urx) urx = urx0;
if (ury0 > ury) ury = ury0;
}
return G;
}
}
BEG_G {
llx = 1000000; lly = 1000000; urx = -1000000; ury = -1000000;
}
N {
sscanf ($.pos, "%lf,%lf", &x, &y);
w2 = (36.0*(double)$.width);
h2 = (36.0*(double)$.height);
if ((x - w2) < llx) llx = x - w2;
if ((x + w2) > urx) urx = x + w2;
if ((y - h2) < lly) lly = y - h2;
if ((y + h2) > ury) ury = y + h2;
}
END_G {
clustBB ($);
$.bb = sprintf ("%lf,%lf,%lf,%lf", llx, lly, urx, ury);
}