WayLocation PertyWaySplitVisitor::_calcSplitPoint(ConstWayPtr way) const
{
//create a way location that is the minimum node spacing distance from the beginning of the way
WayLocation splitWayStart(_map->shared_from_this(), way, _minNodeSpacing);
//create a way location that is the minimum node spacing from the end of the way
WayLocation splitWayEnd = WayLocation::createAtEndOfWay(_map->shared_from_this(), way).
move(-1 * _minNodeSpacing);
//if the length between the way locations is greater than zero, then then a way location can be
//selected that doesn't violate the min node spacing
const double splitWayLength =
splitWayEnd.calculateDistanceOnWay() - splitWayStart.calculateDistanceOnWay();
LOG_VART(splitWayLength);
if (splitWayLength > 0)
{
boost::uniform_real<> randomSplitPointDistribution(0.0, splitWayLength);
const double splitPoint = randomSplitPointDistribution(*_rng);
LOG_VART(splitPoint);
return splitWayStart.move(splitPoint);
}
//otherwise, return an empty location
else
{
return WayLocation();
}
}
void MaximalSubline::_snapToTerminal(WayLocation& wl, bool startOfLines, double thresh)
{
Meters d1 = wl.calculateDistanceOnWay();
// if we're not at the start of the line
if (!startOfLines)
{
// calculate the distance from the end to this way location.
d1 = ElementConverter(wl.getMap()).convertToLineString(wl.getWay())->getLength() - d1;
}
if (thresh == -1)
{
thresh = _minSplitSize;
}
// if we should snap the end points
if (d1 <= thresh)
{
// if we're at the start of the line
if (startOfLines)
{
// snap to the beginning
wl = WayLocation(wl.getMap(), wl.getWay(), 0, 0.0);
}
// if we're at the end of the line
else
{
// snap to the end
wl = WayLocation(wl.getMap(), wl.getWay(), wl.getWay()->getNodeCount(), 0.0);
}
}
}
