An abstract base class for creating a [name] object that contains methods for interpolation. For an array of [name]s see [page:CurvePath].

This constructor creates a new [name].

This value determines the amount of divisions when calculating the cumulative segment lengths of a curve via [page:.getLengths]. To ensure precision when using methods like [page:.getSpacedPoints], it is recommended to increase [page:.arcLengthDivisions] if the curve is very large. Default is 200.

[page:Float t] - A position on the curve. Must be in the range [ 0, 1 ].

[page:Vector optionalTarget] — (optional) If specified, the result will be copied into this Vector,
otherwise a new Vector will be created.

Returns a vector for a given position on the curve.

[page:Float u] - A position on the curve according to the arc length. Must be in the range [ 0, 1 ].

[page:Vector optionalTarget] — (optional) If specified, the result will be copied into this Vector,
otherwise a new Vector will be created.

Returns a vector for a given position on the curve according to the arc length.

divisions -- number of pieces to divide the curve into. Default is *5*.

Returns a set of divisions + 1 points using getPoint( t ).

divisions -- number of pieces to divide the curve into. Default is *5*.

Returns a set of divisions + 1 equi-spaced points using getPointAt( u ).

Get total curve arc length.

Get list of cumulative segment lengths.

Update the cumlative segment distance cache.

Given u in the range ( 0 .. 1 ), returns [page:Float t] also in the range ( 0 .. 1 ). u and t can then be used to give you points which are equidistant from the ends of the curve, using [page:.getPoint].

[page:Float t] - A position on the curve. Must be in the range [ 0, 1 ].

[page:Vector optionalTarget] — (optional) If specified, the result will be copied into this Vector,
otherwise a new Vector will be created.

Returns a unit vector tangent at t. If the derived curve does not implement its
tangent derivation, two points a small delta apart will be used to find its gradient
which seems to give a reasonable approximation.

[page:Float u] - A position on the curve according to the arc length. Must be in the range [ 0, 1 ].

[page:Vector optionalTarget] — (optional) If specified, the result will be copied into this Vector,
otherwise a new Vector will be created.

Returns tangent at a point which is equidistant to the ends of the curve from the
point given in [page:.getTangent].

Generates the Frenet Frames. Requires a curve definition in 3D space. Used in geometries like [page:TubeGeometry] or [page:ExtrudeGeometry].

Creates a clone of this instance.

Copies another [name] object to this instance.

Returns a JSON object representation of this instance.

Copies the data from the given JSON object to this instance.

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]