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rulegen:: fixed a possible crash with generating altmaps due to a consistent lack of left or right

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Zeno Rogue 2025-03-11 00:39:09 +01:00
parent 75ecbe4e85
commit d99001d39a
1 changed files with 26 additions and 0 deletions
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26
rulegen.cpp
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@ -1640,6 +1640,32 @@ void find_possible_parents() {
ts.is_possible_parent = false;
changes++;
}
if(!changes) for(auto& ts: treestates)
if(ts.is_possible_parent) {
set<int> visited;
vector<int> vis;
auto visit = [&] (int v) { if(visited.count(v)) return; visited.insert(v); vis.push_back(v); };
bool left_found = false, right_found = false;
visit(ts.id);
for(int i=0; i<isize(vis); i++) {
auto at = vis[i];
for(auto p: treestates[at].possible_parents) {
int at1 = p.first, ppar = p.second;
visit(at1);
auto& r = treestates[at1].rules;
for(int j=1; j<isize(r); j++) if(r[j] >= 0 && treestates[r[j]].is_live) {
if(j < ppar) left_found = true;
if(j > ppar) right_found = true;
}
}
if(left_found && right_found) break;
}
if(!left_found || !right_found) {
ts.is_possible_parent = false;
changes++;
}
}
if(!changes) break;
}