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(svn r14362) -Fix (r3403): Also connect multiheaded parts in free wagon chains.

This commit is contained in:
frosch 2008-09-20 10:53:08 +00:00
parent c3c58c95b9
commit 07418cbf7f
1 changed files with 44 additions and 8 deletions
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52
src/train_cmd.cpp
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@ -4434,8 +4434,23 @@ void ConnectMultiheadedTrains()
}
FOR_ALL_VEHICLES(v) {
if (v->type == VEH_TRAIN && IsFrontEngine(v)) {
for (Vehicle *u = v; u != NULL; u = u->Next()) {
if (v->type == VEH_TRAIN) {
/* Two ways to associate multiheaded parts to each other:
* sequential-matching: Trains shall be arranged to look like <..>..<..>..<..>..
* bracket-matching: Free vehicle chains shall be arranged to look like ..<..<..>..<..>..>..
*
* Note: Old savegames might contain chains which do not comply with these rules, e.g.
* - the front and read parts have invalid orders
* - different engine types might be combined
* - there might be different amounts of front and rear parts.
*
* Note: The multiheaded parts need to be matched exactly like they are matched on the server, else desyncs will occur.
* This is why two matching strategies are needed.
*/
bool sequential_matching = IsFrontEngine(v);
for (Vehicle *u = v; u != NULL; u = GetNextVehicle(u)) {
if (u->u.rail.other_multiheaded_part != NULL) continue; // we already linked this one
if (IsMultiheaded(u)) {
@ -4445,14 +4460,35 @@ void ConnectMultiheadedTrains()
u->spritenum--;
}
/* Find a matching back part */
EngineID eid = u->engine_type;
Vehicle *w;
for (w = u->Next(); w != NULL && (w->engine_type != u->engine_type || w->u.rail.other_multiheaded_part != NULL); w = GetNextVehicle(w)) {}
if (w != NULL) {
/* we found a car to partner with this engine. Now we will make sure it face the right way */
if (IsTrainEngine(w)) {
ClearTrainEngine(w);
w->spritenum++;
if (sequential_matching) {
for (w = GetNextVehicle(u); w != NULL; w = GetNextVehicle(w)) {
if (w->engine_type != eid || w->u.rail.other_multiheaded_part != NULL || !IsMultiheaded(w)) continue;
/* we found a car to partner with this engine. Now we will make sure it face the right way */
if (IsTrainEngine(w)) {
ClearTrainEngine(w);
w->spritenum++;
}
break;
}
} else {
uint stack_pos = 0;
for (w = GetNextVehicle(u); w != NULL; w = GetNextVehicle(w)) {
if (w->engine_type != eid || w->u.rail.other_multiheaded_part != NULL || !IsMultiheaded(w)) continue;
if (IsTrainEngine(w)) {
stack_pos++;
} else {
if (stack_pos == 0) break;
stack_pos--;
}
}
}
if (w != NULL) {
w->u.rail.other_multiheaded_part = u;
u->u.rail.other_multiheaded_part = w;
} else {