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Fix overflow on zero duration segments, fixes #4283.

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As a form of smoothing we use the previous speed value instead.
This makes sense because the zero duration segments have to be very
short, potentially also zero length.
This commit is contained in:
Patrick Niklaus
2018-01-18 11:08:16 +00:00
committed by Patrick Niklaus
parent 72a23645a8
commit 6eb4247484
2 changed files with 46 additions and 13 deletions
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include/engine/api/route_api.hpp
+22 -13
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@@ -88,11 +88,12 @@ class RouteAPI : public BaseAPI
{
util::json::Array annotations_store;
annotations_store.values.reserve(leg.annotations.size());
std::for_each(leg.annotations.begin(),
leg.annotations.end(),
[Get, &annotations_store](const auto &step) {
annotations_store.values.push_back(Get(step));
});
for (const auto& step : leg.annotations)
{
annotations_store.values.push_back(Get(step));
}
return annotations_store;
}
@@ -255,10 +256,19 @@ class RouteAPI : public BaseAPI
// AnnotationsType uses bit flags, & operator checks if a property is set
if (parameters.annotations_type & RouteParameters::AnnotationsType::Speed)
{
double prev_speed = 0;
annotation.values["speed"] = GetAnnotations(
leg_geometry, [](const guidance::LegGeometry::Annotation &anno) {
auto val = std::round(anno.distance / anno.duration * 10.) / 10.;
return util::json::clamp_float(val);
leg_geometry, [&prev_speed](const guidance::LegGeometry::Annotation &anno) {
if (anno.duration < std::numeric_limits<double>::min())
{
return prev_speed;
}
else
{
auto speed = std::round(anno.distance / anno.duration * 10.) / 10.;
prev_speed = speed;
return util::json::clamp_float(speed);
}
});
}
@@ -293,11 +303,10 @@ class RouteAPI : public BaseAPI
{
util::json::Array nodes;
nodes.values.reserve(leg_geometry.osm_node_ids.size());
std::for_each(leg_geometry.osm_node_ids.begin(),
leg_geometry.osm_node_ids.end(),
[this, &nodes](const OSMNodeID &node_id) {
nodes.values.push_back(static_cast<std::uint64_t>(node_id));
});
for (const auto node_id : leg_geometry.osm_node_ids)
{
nodes.values.push_back(static_cast<std::uint64_t>(node_id));
}
annotation.values["nodes"] = std::move(nodes);
}