Function getCurveSections

getCurveSections(
route: Route,
options?: CurveSectionsOptions,
): CurveSectionProps[]
Finds the curves of a route: the stretches where the road keeps turning the same way.
Parameters
- route: Route
  The route, with its geometry, and its guidance instructions when it has them.
- options: CurveSectionsOptions = {}
  The thresholds a stretch has to reach to count as a curve.
Returns CurveSectionProps[]
The curves, in order along the route.
Remarks
- calculateRoute fills sections.curve when its sectionTypes names curve, with these thresholds from its curveDetection.curve. Call this, or withCurveSections, to find them again with others.
- A curve ends at a straight longer than maxStraightInMeters, or where the road turns the other way, so an S-bend is two curves.
- A sharp corner between two straights, as at most junctions, is no curve: the road doesn't bend there. A roundabout is, and on a route with guidance a curve at a junction names its maneuver, as CurveSectionProps sets out.
- Where a route turns back at a waypoint, as at the end of a dead-end road, it makes no curve.
- Each curve's severity reads the route's speedLimit sections, when it has them.
Example
```
// Only the hard curves, to warn a passenger prone to motion sickness
const hard = getCurveSections(route, { maxRadiusInMeters: 50, minHeadingChangeInDegrees: 60 });
```