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(svn r25909) -Fix (r25906): That simplification was a bit too much.

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This commit is contained in:
fonsinchen 2013-10-23 17:11:34 +00:00
parent 6c4e7ab51d
commit b5dd83e84f
2 changed files with 16 additions and 4 deletions
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19
src/linkgraph/refresh.cpp
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@ -146,18 +146,26 @@ void LinkRefresher::ResetRefit()
const Order *LinkRefresher::PredictNextOrder(const Order *cur, const Order *next, uint8 flags)
{
int num_hops = 0; // Count hops to catch infinite loops without station or implicit orders.
while (next != NULL && (next->IsType(OT_CONDITIONAL) || cur == next)) {
/* next is good if it's either NULL (then the caller will stop the
* evaluation) or if it's not conditional and the caller allows it to be
* chosen (by setting USE_NEXT). */
while (next != NULL && (!HasBit(flags, USE_NEXT) || next->IsType(OT_CONDITIONAL))) {
/* After the first step any further non-conditional order is good,
* regardless of previous USE_NEXT settings. The case of cur and next or
* their respective stations being equal is handled elsewhere. */
SetBit(flags, USE_NEXT);
if (next->IsType(OT_CONDITIONAL)) {
const Order *skip_to = this->vehicle->orders.list->GetNextDecisionNode(
this->vehicle->orders.list->GetOrderAt(next->GetConditionSkipToOrder()), num_hops++);
if (skip_to != NULL) {
/* Make copies of capacity tracking lists. There is potential
* for optimization here. If the vehicle never refits we don't
* for optimization here: If the vehicle never refits we don't
* need to copy anything. Also, if we've seen the branched link
* before we don't need to branch at all. */
LinkRefresher branch(*this);
/* If skip_to points back to the original order, use the next one.
* Otherwise do use it. */
branch.RefreshLinks(cur, skip_to, flags);
}
}
@ -234,6 +242,9 @@ void LinkRefresher::RefreshLinks(const Order *cur, const Order *next, uint8 flag
this->seen_hops->insert(hop);
}
/* Don't use the same order again, but choose a new one in the next round. */
ClrBit(flags, USE_NEXT);
/* Skip resetting and link refreshing if next order won't do anything with cargo. */
if (!next->IsType(OT_GOTO_STATION) && !next->IsType(OT_IMPLICIT)) continue;

1
src/linkgraph/refresh.h
View File

@ -31,6 +31,7 @@ protected:
* an influence on the next one.
*/
enum RefreshFlags {
USE_NEXT, ///< There was a conditional jump. Try to use the given next order when looking for a new one.
HAS_CARGO, ///< Consist could leave the last stop where it could interact with cargo carrying cargo (i.e. not an "unload all" + "no loading" order).
WAS_REFIT, ///< Consist was refit since the last stop where it could interact with cargo.
RESET_REFIT ///< Consist had a chance to load since the last refit and the refit capacities can be reset.