API Reference › core-geometry› Curve › CurvePrimitive › ClosestPoint

closestPoint Method

Search for a point on the curve that is closest to the spacePoint.

  • If the space point is exactly on the curve, this is the reverse of fractionToPoint.
  • Since CurvePrimitive should always have start and end available as candidate points, this method should always succeed.

closestPoint(spacePoint: Point3d, extend?: VariantCurveExtendParameter, result?: CurveLocationDetail): undefined | CurveLocationDetail

@returns details of the closest point.

Parameter Type Description
spacePoint Point3d point in space.
extend VariantCurveExtendParameter (optional) compute the closest point to the curve extended according to variant type (default false)
result CurveLocationDetail (optional) pre-allocated detail to populate and return.

Returns - undefined | CurveLocationDetail

details of the closest point.

Defined in

Last Updated: 27 June, 2025