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Code Issues Releases Wiki Activity

rulegen:: some fixes in get_parent_dir

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This commit is contained in:
Zeno Rogue 2021-08-17 00:24:38 +02:00
parent f19ba00324
commit 48b91ddafb
1 changed files with 22 additions and 6 deletions
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28
rulegen.cpp
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@ -379,6 +379,15 @@ void check_solid(tcell *c, int d) {
}
}
EX void remove_parentdir(tcell *c) {
c->parent_dir = MYSTERY;
c->code = MYSTERY;
for(int i=0; i<c->type; i++) if(c->move(i)) {
c->move(i)->parent_dir = MYSTERY;
c->move(i)->code = MYSTERY;
}
}
void fix_distances(tcell *c) {
c->distance_fixed = true;
vector<tcell*> q = {c};
@ -393,13 +402,14 @@ void fix_distances(tcell *c) {
c1 = c->cmove(i);
if(c1->dist == MYSTERY) continue;
auto& d1 = c1->dist;
if(d > d1+1) { d = d1+1; goto restart; }
if(d > d1+1) { d = d1+1; remove_parentdir(c); goto restart; }
if(d1 > d+1) {
if(c1->is_solid) {
check_solid(c1, d+1);
solid_errors++;
}
d1 = d+1;
remove_parentdir(c1);
q.push_back(c1);
}
}
@ -422,6 +432,7 @@ void unify_distances(tcell *c1, tcell *c2) {
if(c2->is_solid && d != d2) solid_errors++;
c1->distance_fixed = c1->distance_fixed || c2->distance_fixed;
c1->is_solid = c1->is_solid || c2->is_solid;
remove_parentdir(c1);
if(c1->dist < MYSTERY)
fix_distances(c1);
}
@ -503,7 +514,7 @@ EX void look_for_shortcuts(tcell *c) {
/** which neighbor will become the parent of c */
int get_parent_dir(tcell *c) {
EX int get_parent_dir(tcell *c) {
if(c->parent_dir != MYSTERY) return c->parent_dir;
int bestd = -1;
vector<int> bestrootpath;
@ -520,8 +531,8 @@ int get_parent_dir(tcell *c) {
auto beats = [&] (int i, int old) {
if(old == -1) return true;
if(i%k != old%k) return i%k < old%k;
if(i < (n+1)/2) return i < old && old < i+n/2;
return i < old || old < i-(n+1)/2;
if(old < i) old += n;
return old < i+(n+1)/2;
};
int d = c->dist;
@ -532,7 +543,10 @@ int get_parent_dir(tcell *c) {
if(c1->dist < d) nearer.push_back(i);
}
ufindc(c); if(d != c->dist) return get_parent_dir(c);
auto oc = c;
ufindc(c); if(d != c->dist || oc != c) {
return get_parent_dir(c);
}
// celebrity identification problem
@ -541,8 +555,10 @@ int get_parent_dir(tcell *c) {
bestd = ne;
for(auto ne: nearer)
if(ne != bestd && beats(ne, bestd))
if(ne != bestd && beats(ne, bestd)) {
debuglist = { c };
throw rulegen_failure("still confused");
}
if(bestd == -1) {
throw rulegen_failure("should not happen");