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rulegen3:: faster get_roadsign

This commit is contained in:
Zeno Rogue 2022-08-17 17:31:32 +02:00
parent eb4af6c584
commit 7f0bbcfef3
1 changed files with 16 additions and 13 deletions
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29
rulegen3.cpp
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@ -110,30 +110,33 @@ EX int get_roadsign(twalker what) {
tail.push_back(t->c.spin(t->parent_dir));
t = t->move(t->parent_dir);
}
map<tcell*, int> visited;
queue<tcell*> vqueue;
/* we reuse known_sides */
vector<tcell*> vqueue;
auto visit = [&] (tcell *c, int dir) {
if(visited.count(c)) return;
visited[c] = dir;
vqueue.push(c);
if(c->known_sides) return;
c->known_sides = dir + 1;
vqueue.push_back(c);
};
visit(s, MYSTERY);
while(true) {
if(vqueue.empty()) throw hr_exception("vqueue empty");
tcell *c = vqueue.front();
for(int i=0;; i++) {
if(i == isize(vqueue)) throw hr_exception("vqueue empty");
tcell *c = vqueue[i];
if(c == t) break;
vqueue.pop();
for(int i=0; i<c->type; i++)
if(c->move(i) && c->move(i)->dist <= dlimit)
visit(c->move(i), c->c.spin(i));
for(int i=0; i<c->type; i++) {
tcell *c1 = c->move(i);
if(c1 && c1->dist <= dlimit)
visit(c1, c->c.spin(i));
if(c1 == t) break;
}
}
while(t != s) {
add_road_shortcut(s, t);
int d = visited.at(t);
int d = t->known_sides-1;
tail.push_back(t->dist - dlimit);
tail.push_back(t->c.spin(d));
t = t->move(d);
}
for(auto c: vqueue) c->known_sides = 0;
reverse(tail.begin(), tail.end());
for(auto t: tail) result.push_back(t);
if(roadsign_id.count(result)) return roadsign_id[result];