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Fixes issue #83. The bug was caused by improper retrieval of the packed

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DennisOSRM 2012-02-09 17:53:09 +01:00
parent bb8645dd18
commit 96f2358d28
1 changed files with 36 additions and 19 deletions
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35
DataStructures/SearchEngine.h
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@ -124,15 +124,14 @@ public:
if(searchFrom1stStartNode) {
_forwardHeap->Insert(phantomNodePair.startPhantom.edgeBasedNode, -phantomNodePair.startPhantom.weight1, phantomNodePair.startPhantom.edgeBasedNode);
_forwardHeap2->Insert(phantomNodePair.startPhantom.edgeBasedNode, -phantomNodePair.startPhantom.weight1, phantomNodePair.startPhantom.edgeBasedNode);
// INFO("1,2)forw insert " << phantomNodePair.startPhantom.edgeBasedNode << " with weight " << phantomNodePair.startPhantom.weight1);
// INFO("a 1,2)forw insert " << phantomNodePair.startPhantom.edgeBasedNode << " with weight " << phantomNodePair.startPhantom.weight1);
// } else {
// INFO("Skipping first start node");
}
if(phantomNodePair.startPhantom.isBidirected() && searchFrom2ndStartNode) {
_forwardHeap->Insert(phantomNodePair.startPhantom.edgeBasedNode+1, -phantomNodePair.startPhantom.weight2, phantomNodePair.startPhantom.edgeBasedNode+1);
_forwardHeap2->Insert(phantomNodePair.startPhantom.edgeBasedNode+1, -phantomNodePair.startPhantom.weight2, phantomNodePair.startPhantom.edgeBasedNode+1);
// INFO("1)forw insert " << phantomNodePair.startPhantom.edgeBasedNode+1 << " with weight " << distance1-phantomNodePair.startPhantom.weight1);
// INFO("2)forw insert " << phantomNodePair.startPhantom.edgeBasedNode+1 << " with weight " << distance2-phantomNodePair.startPhantom.weight1);
// INFO("b 1,2)forw insert " << phantomNodePair.startPhantom.edgeBasedNode+1 << " with weight " << -phantomNodePair.startPhantom.weight1);
// } else if(!searchFrom2ndStartNode) {
// INFO("Skipping second start node");
}
@ -212,20 +211,24 @@ public:
std::deque<NodeID> temporaryPackedPath1;
std::deque<NodeID> temporaryPackedPath2;
if(INT_MAX != _localUpperbound1) {
_RetrievePackedPathFromHeap(_forwardHeap, _backwardHeap, phantomNodePair, middle1, temporaryPackedPath1);
_RetrievePackedPathFromHeap(_forwardHeap, _backwardHeap, middle1, temporaryPackedPath1);
// INFO("temporaryPackedPath1 ends with " << *(temporaryPackedPath1.end()-1) );
}
// INFO("middle2: " << middle2);
if(INT_MAX != _localUpperbound2) {
_RetrievePackedPathFromHeap(_forwardHeap2, _backwardHeap2, phantomNodePair, middle2, temporaryPackedPath2);
_RetrievePackedPathFromHeap(_forwardHeap2, _backwardHeap2, middle2, temporaryPackedPath2);
// INFO("temporaryPackedPath2 ends with " << *(temporaryPackedPath2.end()-1) );
}
//if one of the paths was not found, replace it with the other one.
if(0 == temporaryPackedPath1.size()) {
// INFO("Deleting path 1");
temporaryPackedPath1.insert(temporaryPackedPath1.end(), temporaryPackedPath2.begin(), temporaryPackedPath2.end());
_localUpperbound1 = _localUpperbound2;
}
if(0 == temporaryPackedPath2.size()) {
// INFO("Deleting path 2");
temporaryPackedPath2.insert(temporaryPackedPath2.end(), temporaryPackedPath1.begin(), temporaryPackedPath1.end());
_localUpperbound2 = _localUpperbound1;
}
@ -234,21 +237,28 @@ public:
//Plug paths together, s.t. end of packed path is begin of temporary packed path
if(0 < packedPath1.size() && 0 < packedPath2.size() ) {
// INFO("Both paths are non-empty");
if( *(temporaryPackedPath1.begin()) == *(temporaryPackedPath2.begin())) {
// INFO("both paths start with the same node:" << *(temporaryPackedPath1.begin()));
//both new route segments start with the same node, thus one of the packedPath must go.
assert( (packedPath1.size() == packedPath2.size() ) || (*(packedPath1.end()-1) != *(packedPath2.end()-1)) );
if( *(packedPath1.end()-1) == *(temporaryPackedPath1.begin())) {
// INFO("Deleting packedPath2 that ends with " << *(packedPath2.end()-1) << ", other ends with " << *(packedPath1.end()-1));
packedPath2.clear();
packedPath2.insert(packedPath2.end(), packedPath1.begin(), packedPath1.end());
distance2 = distance1;
// INFO("packedPath2 now ends with " << *(packedPath2.end()-1));
} else {
// INFO("Deleting path1 that ends with " << *(packedPath1.end()-1) << ", other ends with " << *(packedPath2.end()-1));
packedPath1.clear();
packedPath1.insert(packedPath1.end(), packedPath2.begin(), packedPath2.end());
distance1 = distance2;
// INFO("Path1 now ends with " << *(packedPath1.end()-1));
}
} else {
//packed paths 1 and 2 may need to switch.
if(*(packedPath1.end()-1) != *(temporaryPackedPath1.begin())) {
// INFO("Switching");
packedPath1.swap(packedPath2);
std::swap(distance1, distance2);
}
@ -328,7 +338,7 @@ public:
return _upperbound;
}
std::deque<NodeID> packedPath;
_RetrievePackedPathFromHeap(_forwardHeap, _backwardHeap, phantomNodes, middle, packedPath);
_RetrievePackedPathFromHeap(_forwardHeap, _backwardHeap, middle, packedPath);
// std::cout << "0: ";
// for(unsigned i = 0; i < packedPath.size(); ++i)
// std::cout << packedPath[i] << " ";
@ -369,17 +379,22 @@ public:
return GetEscapedNameForNameID(nameID);
}
private:
inline void _RetrievePackedPathFromHeap(HeapPtr & _fHeap, HeapPtr & _bHeap, PhantomNodes & phantomNodePair, const NodeID middle, std::deque<NodeID>& packedPath) {
inline void _RetrievePackedPathFromHeap(HeapPtr & _fHeap, HeapPtr & _bHeap, const NodeID middle, std::deque<NodeID>& packedPath) {
NodeID pathNode = middle;
while(phantomNodePair.startPhantom.edgeBasedNode != pathNode && (!phantomNodePair.startPhantom.isBidirected() || phantomNodePair.startPhantom.edgeBasedNode+1 != pathNode) ) {
if(_fHeap->GetData(pathNode).parent != middle) {
do {
pathNode = _fHeap->GetData(pathNode).parent;
packedPath.push_front(pathNode);
}while(pathNode != _fHeap->GetData(pathNode).parent);
}
packedPath.push_back(middle);
pathNode = middle;
while(phantomNodePair.targetPhantom.edgeBasedNode != pathNode && (!phantomNodePair.targetPhantom.isBidirected() || phantomNodePair.targetPhantom.edgeBasedNode+1 != pathNode)) {
if(_bHeap->GetData(pathNode).parent != middle) {
do{
pathNode = _bHeap->GetData(pathNode).parent;
packedPath.push_back(pathNode);
} while (pathNode != _bHeap->GetData(pathNode).parent);
}
// std::cout << "unpacking: ";
// for(std::deque<NodeID>::iterator it = packedPath.begin(); it != packedPath.end(); ++it)
@ -476,6 +491,7 @@ private:
for(typename GraphT::EdgeIterator eit = _graph->BeginEdges(edge.first);eit < _graph->EndEdges(edge.first);++eit){
const int weight = _graph->GetEdgeData(eit).distance;
if(_graph->GetTarget(eit) == edge.second && weight < smallestWeight && _graph->GetEdgeData(eit).forward){
// INFO("1smallest " << eit << ", " << weight);
smallestEdge = eit;
smallestWeight = weight;
}
@ -485,6 +501,7 @@ private:
for(typename GraphT::EdgeIterator eit = _graph->BeginEdges(edge.second);eit < _graph->EndEdges(edge.second);++eit){
const int weight = _graph->GetEdgeData(eit).distance;
if(_graph->GetTarget(eit) == edge.first && weight < smallestWeight && _graph->GetEdgeData(eit).backward){
// INFO("2smallest " << eit << ", " << weight);
smallestEdge = eit;
smallestWeight = weight;
}