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Editing: addranks
/* Assuming nodes have been positioned by dot, this adds a rank * attribute by placing all nodes with the same y value on a specific * integer rank. * If the graph has rankdir=LR, x and y are flipped. */ BEG_G { double x,y; int lv[double]; int r, rk[double]; int flip; if (isAttr($,"G","rankdir") && $.rankdir=="LR") flip = 1; } N { sscanf($.pos,"%f,%f",&x,&y); if (flip) lv[x] = 1; else lv[y] = 1; } BEG_G { r = 0; if (flip) forr (lv[x]) { rk[x] = r++; /* printf (2, "rk[%f] = %d\n", y, rk[y]); */ } else forr (lv[y]) { rk[y] = r++; /* printf (2, "rk[%f] = %d\n", y, rk[y]); */ } } N { sscanf($.pos,"%f,%f",&x,&y); /* printf(2, "node %s y %f rk %d\n", $.name, y, rk[y]); */ if (flip) $.rank = sprintf("%d", rk[x]); else $.rank = sprintf("%d", rk[y]); }
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