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rulegen:: optimized smart shortcuts

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This commit is contained in:
Zeno Rogue 2021-12-25 21:32:08 +01:00
parent d74edf07db
commit 71fd8eccf5
1 changed files with 9 additions and 4 deletions
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13
rulegen.cpp
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@ -433,6 +433,7 @@ struct shortcut {
vector<int> post;
tcell *sample;
int delta;
int last_dir;
};
#endif
@ -490,6 +491,7 @@ EX void shortcut_found(tcell *c, tcell *alt, vector<twalker> &walkers, vector<tw
sh->post = post;
sh->sample = c;
sh->delta = delta;
sh->last_dir = c->any_nearer;
auto& sh1 = *sh;
if(debugflags & DF_GEOM) println(hlog, "exhaustive search:");
@ -719,25 +721,28 @@ EX void look_for_shortcuts(tcell *c, shortcut& sh) {
calc_distances(tw.at);
}
int expected_dist = c->dist - isize(sh.pre);
int more_steps = isize(sh.post);
int d = arb::current.shapes[c->id].cycle_length;
if(sh.last_dir % d < c->any_nearer % d) more_steps--;
tw += sh.delta;
for(auto it = sh.post.rbegin(); it != sh.post.rend(); it++) {
auto& v = *it;
if(tw.at->dist > expected_dist && !tw.peek() && !(flags & w_less_smart_advance)) return;
ufind(tw);
if(!tw.peek() && tw.at->dist + more_steps > c->dist && !(flags & w_less_smart_advance)) return;
tw += wstep;
calc_distances(tw.at);
expected_dist++;
more_steps--;
tw -= v;
}
process_fix_queue();
if(tw.at->dist < c->dist) {
if(debugflags & DF_GEOM)
println(hlog, "smart shortcut updated ", c->dist, " to ", tw.at->dist);
push_unify(tw, tw0);
}
push_unify(tw, tw0);
process_fix_queue();
}