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Code Issues Releases Wiki Activity

in fix_distances, also fix parent_dir

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This commit is contained in:
Zeno Rogue 2021-12-25 01:35:48 +01:00
parent 5115a379ee
commit d1043152dc
1 changed files with 53 additions and 18 deletions
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71
rulegen.cpp
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@ -608,28 +608,63 @@ EX void fix_distances(tcell *c) {
for(int qi=0; qi<isize(q); qi++) {
c = q[qi];
auto& d = c->dist;
restart:
for(int i=0; i<c->type; i++) {
if(!c->move(i)) continue;
tcell *c1 = c->cmove(i);
ufindc(c);
c1 = c->cmove(i);
auto& d1 = c1->dist;
if(d > d1+1) {
if(c->is_solid)
find_new_shortcuts(c, d1+1, c, i, 0);
d = d1+1; c->any_nearer = i; remove_parentdir(c); goto restart;
}
if(d1 > d+1) {
int i1 = c->c.spin(i);
if(c1->is_solid)
find_new_shortcuts(c1, d+1, c1, i1, 0);
d1 = d+1;
c1->any_nearer = i1;
remove_parentdir(c1);
q.push_back(c1);
}
auto process_edge = [&] (twalker tgtw, twalker srcw) {
tcell *tgt = tgtw.at;
tcell *src = srcw.at;
auto& tgt_d = tgt->dist;
int new_d = src->dist + 1;
if(tgt_d > new_d) {
if(tgt->is_solid)
find_new_shortcuts(tgt, new_d, tgt, tgtw.spin, 0);
ufind(tgtw); tgt = tgtw.at;
tgt_d = new_d;
sidecache.clear();
tgt->any_nearer = tgtw.spin;
tgt->parent_dir = MYSTERY;
if(tgt->is_solid) tgt->parent_dir = tgtw.spin;
tgt->code = MYSTERY;
return true;
}
if(tgt_d == new_d && tgt->parent_dir != MYSTERY && tgt->parent_dir != tgtw.spin) {
auto& sh = arb::current.shapes[tgt->id];
auto k = sh.cycle_length;
int dif = tgtw.spin % k - tgt->parent_dir % k;
auto oldp = get_parent_dir(tgtw);
if(dif == 0) {
tgtw.at->parent_dir = MYSTERY;
auto newp = get_parent_dir(tgtw);
if(oldp != newp) {
if(newp != tgtw) throw rulegen_retry("parent_dir confusion should not happen");
dif = -1;
}
}
if(dif < 0) {
tgtw.at->parent_dir = tgtw.spin;
tgtw.at->code = MYSTERY;
ufind(oldp);
indenter ind(2);
tgtw.at->any_nearer = oldp.spin;
find_new_shortcuts(tgtw.at, new_d, tgtw.at, tgtw.spin, 0);
sidecache.clear();
}
}
return false;
};
twalker ci1(c->cmove(i), c->c.spin(i));
twalker ci(c, i);
if(process_edge(ci, ci1)) goto restart;
if(process_edge(ci1, ci)) q.push_back(ci1.at);
}
}
}