void
NBRampsComputer::buildOffRamp(NBNode* cur, NBNodeCont& nc, NBEdgeCont& ec, NBDistrictCont& dc, SUMOReal rampLength, bool dontSplit, std::set<NBEdge*>& incremented) {
NBEdge* potHighway, *potRamp, *prev;
getOffRampEdges(cur, &potHighway, &potRamp, &prev);
// compute the number of lanes to append
const unsigned int firstLaneNumber = prev->getNumLanes();
int toAdd = (potRamp->getNumLanes() + potHighway->getNumLanes()) - firstLaneNumber;
NBEdge* first = prev;
NBEdge* last = prev;
NBEdge* curr = prev;
if (toAdd > 0 && find(incremented.begin(), incremented.end(), prev) == incremented.end()) {
SUMOReal currLength = 0;
while (curr != 0 && currLength + curr->getGeometry().length() - POSITION_EPS < rampLength) {
if (find(incremented.begin(), incremented.end(), curr) == incremented.end()) {
curr->incLaneNo(toAdd);
curr->invalidateConnections(true);
incremented.insert(curr);
moveRampRight(curr, toAdd);
currLength += curr->getLength(); // !!! loaded length?
last = curr;
}
NBNode* prevN = curr->getFromNode();
if (prevN->getIncomingEdges().size() == 1) {
curr = prevN->getIncomingEdges()[0];
if (curr->getNumLanes() != firstLaneNumber) {
// the number of lanes changes along the computation; we'll stop...
curr = 0;
} else if (last->isTurningDirectionAt(curr)) {
// turnarounds certainly should not be included in a ramp
curr = 0;
} else if (curr == potHighway || curr == potRamp) {
// circular connectivity. do not split!
curr = 0;
}
} else {
// ambigous; and, in fact, what should it be? ...stop
curr = 0;
}
}
// check whether a further split is necessary
if (curr != 0 && !dontSplit && currLength - POSITION_EPS < rampLength && curr->getNumLanes() == firstLaneNumber && find(incremented.begin(), incremented.end(), curr) == incremented.end()) {
// there is enough place to build a ramp; do it
bool wasFirst = first == curr;
Position pos = curr->getGeometry().positionAtOffset(curr->getGeometry().length() - (rampLength - currLength));
NBNode* rn = new NBNode(curr->getID() + "-AddedOffRampNode", pos);
if (!nc.insert(rn)) {
throw ProcessError("Ups - could not build on-ramp for edge '" + curr->getID() + "' (node could not be build)!");
}
std::string name = curr->getID();
bool ok = ec.splitAt(dc, curr, rn, curr->getID(), curr->getID() + "-AddedOffRampEdge", curr->getNumLanes(), curr->getNumLanes() + toAdd);
if (!ok) {
WRITE_ERROR("Ups - could not build on-ramp for edge '" + curr->getID() + "'!");
return;
}
curr = ec.retrieve(name + "-AddedOffRampEdge");
incremented.insert(curr);
last = curr;
moveRampRight(curr, toAdd);
if (wasFirst) {
first = curr;
}
}
if (curr == prev && dontSplit) {
WRITE_WARNING("Could not build off-ramp for edge '" + curr->getID() + "' due to option '--ramps.no-split'");
return;
}
}
// set connections from added ramp to ramp/highway
if (!first->addLane2LaneConnections(potRamp->getNumLanes(), potHighway, 0, MIN2(first->getNumLanes() - 1, potHighway->getNumLanes()), NBEdge::L2L_VALIDATED, true)) {
throw ProcessError("Could not set connection!");
}
if (!first->addLane2LaneConnections(0, potRamp, 0, potRamp->getNumLanes(), NBEdge::L2L_VALIDATED, false)) {
throw ProcessError("Could not set connection!");
}
// patch ramp geometry
PositionVector p = potRamp->getGeometry();
p.pop_front();
p.push_front(first->getLaneShape(0)[-1]);
potRamp->setGeometry(p);
}
