Class Arc

constructor

• new Arc(...args): Arc

• Parameters

  • Rest...args: [] | [Point, number, number, number, boolean] | [Point, number, number, number]

    Arc may be constructed [pc, r, startAngle, endAngle, counterClockWise]. pc - arc center r - arc radius startAngle - start angle in radians from 0 to 2PI endAngle - end angle in radians from 0 to 2PI counterClockwise - arc direction, true - clockwise, false - counterclockwise

  Returns Arc

counterClockwise

endAngle

pc

r

startAngle

box

• get box(): Box

• Get bounding box of the arc

  Returns Box

  bounding box of the arc

center

• get center(): Point

• Get center of arc

  Returns Point

  center of arc

end

• get end(): Point

• Get end point of arc

  Returns Point

  end point of arc

length

• get length(): number

• Get arc length

  Returns number

  arc length

name

• get name(): string

• Shape name

  Returns string

  name of the shape

start

• get start(): Point

• Get start point of arc

  Returns Point

  start point of arc

sweep

• get sweep(): number

• Get sweep angle in radians. Sweep angle is non-negative number from 0 to 2*PI

  Returns number

  sweep angle in radians

vertices

• get vertices(): [Point, Point]

• Returns [Point, Point]

breakToFunctional

• breakToFunctional(): Arc[]

• Breaks arc in extreme point 0, pi/2, pi, 3*pi/2 and returns array of sub-arcs

  Returns Arc[]

chordHeight

• chordHeight(): number

• Returns chord height ("sagitta") of the arc

  Returns number

circularSegmentArea

• circularSegmentArea(): number

• Returns number

circularSegmentDefiniteIntegral

• circularSegmentDefiniteIntegral(ymin): number

• Parameters

  • ymin: number

  Returns number

clone

• clone(): Arc

• Return new cloned instance of arc

  Returns Arc

  cloned arc

contains

• contains(pt): boolean

• Returns true if arc contains point, false otherwise

  Parameters

  • pt: Point

    point to test

  Returns boolean

  true if arc contains point, false otherwise

definiteIntegral

• definiteIntegral(ymin?): number

• Parameters

  • ymin: number = 0

  Returns number

distanceTo

• distanceTo(shape): [number, Segment]

• Calculate distance and shortest segment from arc to shape and return array [distance, shortest segment]

  Parameters

  • shape: Shape<any> | Polygon

    Shape of the one of supported types Point, Line, Circle, Segment, Arc, Polygon or Planar Set

  Returns [number, Segment]

  distance from arc to shape abd shortest segment between arc and shape (started at arc, ended at shape)

intersect

• intersect(shape): Point[]

• Get array of intersection points between arc and other shape

  Parameters

  • shape: Shape<any>

    Shape of the one of supported types
    

  Returns Point[]

  array of intersection points between arc and other shape

middle

• middle(): Point

• Get middle point of the arc

  Returns Point

  middle point of the arc

pointAtLength

• pointAtLength(length): Point

• Get point at given length

  Parameters

  • length: number

    The length along the arc

  Returns Point

  point at given length

reverse

• reverse(): Arc

• Get reversed arc, arc with swapped start and end angles and reversed direction

  Returns Arc

  reversed arc

sortPoints

• sortPoints(pts): Point[]

• Sort given array of points from arc start to end, assuming all points lay on the arc

  Parameters

  • pts: Point[]

    array of points

  Returns Point[]

  new array sorted

split

• split(pt): [] | [Arc, Arc] | [Arc]

• When given point belongs to arc, return array of two arcs split by this point. If points is incident to start or end point of the arc, return clone of the arc. If point does not belong to the arcs, return empty array.

  Parameters

  • pt: Point

    Query point

  Returns [] | [Arc, Arc] | [Arc]

tangentInEnd

• tangentInEnd(): Vector

• Get tangent unit vector on the end point

  Returns Vector

  tangent unit vector in the end point in the direction from end to start

tangentInStart

• tangentInStart(): Vector

• Get tangent unit vector on the start point

  Returns Vector

  tangent unit vector in the start point in the direction from start to end

transform

• transform(matrix?): Arc

• Get new arc transformed using affine transformation matrix
  

  Parameters

  • matrix: Matrix = ...

    affine transformation matrix

  Returns Arc

  transformed arc

StaticarcSE

• arcSE(center, start, end, counterClockwise): Arc

• Get new arc with center, start, end points and direction

  Parameters

  • center: Point

    center point
  • start: Point

    start point
  • end: Point

    end point
  • counterClockwise: boolean

    direction

  Returns Arc

  new arc