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Fix: Encountering two-way red signals could prune unrelated branches. 

The intermediate node branch is now only pruned if the node is on the
path leading to the two-way red signal.
This commit is contained in:
Vít Šefl 2021-05-15 17:23:23 +02:00 committed by rubidium42
parent 97722931a9
commit 33d99d27f4
2 changed files with 7 additions and 4 deletions
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9
src/pathfinder/yapf/yapf_base.hpp
View File

@ -207,11 +207,14 @@ public:
* remain the best intermediate node, and thus the vehicle would still
* go towards the red EOL signal.
*/
void PruneIntermediateNodeBranch()
void PruneIntermediateNodeBranch(Node *n)
{
while (Yapf().m_pBestIntermediateNode != nullptr && (Yapf().m_pBestIntermediateNode->m_segment->m_end_segment_reason & ESRB_CHOICE_FOLLOWS) == 0) {
Yapf().m_pBestIntermediateNode = Yapf().m_pBestIntermediateNode->m_parent;
bool intermediate_on_branch = false;
while (n != nullptr && (n->m_segment->m_end_segment_reason & ESRB_CHOICE_FOLLOWS) == 0) {
if (n == Yapf().m_pBestIntermediateNode) intermediate_on_branch = true;
n = n->m_parent;
}
if (intermediate_on_branch) Yapf().m_pBestIntermediateNode = n;
}
/**

2
src/pathfinder/yapf/yapf_costrail.hpp
View File

@ -199,7 +199,7 @@ public:
* was it first signal which is two-way? */
if (!IsPbsSignal(sig_type) && Yapf().TreatFirstRedTwoWaySignalAsEOL() && n.flags_u.flags_s.m_choice_seen && has_signal_against && n.m_num_signals_passed == 0) {
/* yes, the first signal is two-way red signal => DEAD END. Prune this branch... */
Yapf().PruneIntermediateNodeBranch();
Yapf().PruneIntermediateNodeBranch(&n);
n.m_segment->m_end_segment_reason |= ESRB_DEAD_END;
Yapf().m_stopped_on_first_two_way_signal = true;
return -1;