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(svn r25609) -Fix [FS#5216]: under certain circumstances a track type change would make the end-of-line-is-red setting ineffective

This commit is contained in:
rubidium 2013-07-14 09:21:46 +00:00
parent 740643f2b2
commit f178899609
2 changed files with 17 additions and 1 deletions
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15
src/pathfinder/yapf/yapf_base.hpp
View File

@ -223,6 +223,21 @@ public:
}
}
/**
* In some cases an intermediate node branch should be pruned.
* The most prominent case is when a red EOL signal is encountered, but
* there was a segment change (e.g. a rail type change) before that. If
* the branch would not be pruned, the rail type change location would
* remain the best intermediate node, and thus the vehicle would still
* go towards the red EOL signal.
*/
void PruneIntermediateNodeBranch()
{
while (Yapf().m_pBestIntermediateNode != NULL && (Yapf().m_pBestIntermediateNode->m_segment->m_end_segment_reason & ESRB_CHOICE_FOLLOWS) == 0) {
Yapf().m_pBestIntermediateNode = Yapf().m_pBestIntermediateNode->m_parent;
}
}
/**
* AddNewNode() - called by Tderived::PfFollowNode() for each child node.
* Nodes are evaluated here and added into open list

3
src/pathfinder/yapf/yapf_costrail.hpp
View File

@ -212,7 +212,8 @@ public:
/* we have a red signal in our direction
* 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 */
/* yes, the first signal is two-way red signal => DEAD END. Prune this branch... */
Yapf().PruneIntermediateNodeBranch();
n.m_segment->m_end_segment_reason |= ESRB_DEAD_END;
Yapf().m_stopped_on_first_two_way_signal = true;
return -1;