Class Arc

constructor

• new Arc(
      plane: Plane,
      angle: number,
      radius: number,
      initialSurfaceNormal?: Vec3,
  ): Arc

  Constructor.

  Parameters

  • plane: Plane

    The plane in which the arc lies.
  • angle: number

    The angle for the arc.
  • radius: number

    The uniform radius for the arc.
  • initialSurfaceNormal: Vec3 = Vec3.zero

    The (optional) initial surface normal for the arc.

  Returns Arc

Readonlyangle

ReadonlyinitialSurfaceNormal

Readonlyplane

Readonlyradius

closed

• get closed(): boolean

  Whether the arc is a complete circle.

  Returns boolean

length

• get length(): number

  The arc length.

  Returns number

type

• get type(): CurveType

  The type of the curve.

  Returns CurveType

frame

• frame(s: number): Frame

  Evaluates the frame at the specified distance.

  Parameters

  • s: number

    The distance.

  Returns Frame

  The frame.

normal

• normal(s: number): Vec3

  Evaluates the normal to the arc at the specified arc-length.

  Parameters

  • s: number

    The arc-length.

  Returns Vec3

  The normal to the arc.

  Remarks

  Uses the supplied initial surface normal when it is non-zero; otherwise uses the geometric normal.

point

• point(s: number): Vec3

  Evaluates the point on the arc at the specified arc-length.

  Parameters

  • s: number

    The arc-length.

  Returns Vec3

  The point on the arc.

projectedAngle

• projectedAngle(point: IVec3): number

  Calculates the angle for the specified point when projected onto the arc.

  Parameters

  • point: IVec3

    The point.

  Returns number

  The angle for the projected point.

projectedLength

• projectedLength(point: IVec3): number

  Calculates the arc-length for the specified point when projected onto the arc.

  Parameters

  • point: IVec3

    The point.

  Returns number

  The arc-length for the projected point.

tangent

• tangent(s: number): Vec3

  Evaluates the tangent to the arc at the specified arc-length.

  Parameters

  • s: number

    The arc-length.

  Returns Vec3

  The tangent to the arc.

trim

• trim(s0: number, s1: number): Arc

  Returns the portion of the arc between two arc-length distances.

  Parameters

  • s0: number

    The start arc-length.
  • s1: number

    The end arc-length.

  Returns Arc

  The trimmed arc.

Staticequals

• equals(lhs: Arc, rhs: Arc): boolean

  Determines whether two arcs are exactly equal.

  Parameters

  • lhs: Arc

    The first arc.
  • rhs: Arc

    The second arc.

  Returns boolean

  True if the two arcs are exactly equal, false otherwise.

StaticnotEquals

• notEquals(lhs: Arc, rhs: Arc): boolean

  Determines whether two arcs are not exactly equal.

  Parameters

  • lhs: Arc

    The first arc.
  • rhs: Arc

    The second arc.

  Returns boolean

  True if the two arcs are different, false otherwise.