Class QuadraticBezierCurve2

An extensible curve object which contains methods for interpolation

Hierarchy

Constructors

constructor

Properties

arcLengthDivisions cacheArcLengths needsUpdate v0 v1 v2

Methods

computeFrenetFrames getLength getLengths getPoint getPointAt getPoints getResolution getSpacedPoints getTangent getTangentAt getUtoTmapping updateArcLengths

Constructors

constructor

Properties

arcLengthDivisions

arcLengthDivisions: number

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

cacheArcLengths

cacheArcLengths: number[]

needsUpdate

needsUpdate: boolean

v0

v0: Vector2

v1

v1: Vector2

v2

v2: Vector2

Methods

computeFrenetFrames

  • Parameters

    • segments: number
    • closed: boolean

    Returns {
        binormals: Vector3[];
        normals: Vector3[];
        tangents: Vector3[];
    }

getLength

  • Get total curve arc length

    Returns number

getLengths

  • Get list of cumulative segment lengths

    Parameters

    • Optional divisions: number

    Returns number[]

getPoint

  • Virtual base class method to overwrite and implement in subclasses

    • t [0 .. 1] Returns a vector for point t of the curve where t is between 0 and 1

    Parameters

    • t: number
    • Optional optionalTarget: Vector2

    Returns Vector2

getPointAt

  • Get point at relative position in curve according to arc length Returns a vector for point at relative position in curve according to arc length

    Parameters

    • u: number

      [0 .. 1]

    • Optional optionalTarget: Vector2

    Returns Vector2

getPoints

  • Get sequence of points using getPoint( t )

    Parameters

    • Optional divisions: number

    Returns Vector2[]

getResolution

  • Parameters

    • divisions: number

    Returns number

getSpacedPoints

  • Get sequence of equi-spaced points using getPointAt( u )

    Parameters

    • divisions: number

    Returns any[]

getTangent

  • Returns a unit vector tangent at t. If the subclassed curve do not implement its tangent derivation, 2 points a small delta apart will be used to find its gradient which seems to give a reasonable approximation getTangent(t: number, optionalTarget?: T): T;

    Parameters

    Returns Vector2

getTangentAt

  • Returns tangent at equidistance point u on the curve getTangentAt(u: number, optionalTarget?: T): T;

    Parameters

    Returns Vector2

getUtoTmapping

  • Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equi distance

    Parameters

    • u: number
    • Optional distance: number

    Returns number

updateArcLengths

  • Update the cumlative segment distance cache

    Returns void

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