Class Intersection

constructor

• new Intersection(status?): Intersection

• Parameters

  • Optional status: IntersectionType

  Returns Intersection

points

Optional status

Static intersectLineLine

• intersectLineLine(a1, a2, b1, b2, aInfinite?, bInfinite?): Intersection

• Checks if a line intersects another

  Parameters

  • a1: Point

  • a2: Point

  • b1: Point

  • b2: Point

  • Optional aInfinite: boolean = true

    check segment intersection by passing false

  • Optional bInfinite: boolean = true

    check segment intersection by passing false

  Returns Intersection

  See

  • line intersection
  • Cramer's rule

  Static

Static intersectLinePolygon

• intersectLinePolygon(a1, a2, points, infinite?): Intersection

• Checks if line intersects polygon

  Parameters

  • a1: Point

    point on line

  • a2: Point

    other point on line

  • points: Point[]

    polygon points

  • Optional infinite: boolean = true

    check segment intersection by passing false

  Returns Intersection

  Todo

  account for stroke

  Static

  See

  intersectSegmentPolygon for segment intersection

Static intersectPolygonPolygon

• intersectPolygonPolygon(points1, points2): Intersection

• Checks if polygon intersects another polygon

  Parameters

  • points1: Point[]

  • points2: Point[]

  Returns Intersection

  Todo

  account for stroke

  Static

Static intersectPolygonRectangle

• intersectPolygonRectangle(points, r1, r2): Intersection

• Checks if polygon intersects rectangle

  Parameters

  • points: Point[]

    polygon points

  • r1: Point

    top left point of rect

  • r2: Point

    bottom right point of rect

  Returns Intersection

  Static

  See

  intersectPolygonPolygon for polygon intersection

Static intersectSegmentLine

• intersectSegmentLine(s1, s2, l1, l2): Intersection

• Checks if a segment intersects a line

  Parameters

  • s1: Point

    boundary point of segment

  • s2: Point

    other boundary point of segment

  • l1: Point

    point on line

  • l2: Point

    other point on line

  Returns Intersection

  See

  intersectLineLine for line intersection

  Static

Static intersectSegmentPolygon

• intersectSegmentPolygon(a1, a2, points): Intersection

• Checks if segment intersects polygon

  Parameters

  • a1: Point

    boundary point of segment

  • a2: Point

    other boundary point of segment

  • points: Point[]

    polygon points

  Returns Intersection

  Static

  See

  intersectLinePolygon for line intersection

Static intersectSegmentSegment

• intersectSegmentSegment(a1, a2, b1, b2): Intersection

• Checks if a segment intersects another

  Parameters

  • a1: Point

    boundary point of segment

  • a2: Point

    other boundary point of segment

  • b1: Point

    boundary point of segment

  • b2: Point

    other boundary point of segment

  Returns Intersection

  See

  intersectLineLine for line intersection

  Static

Static isPointContained

• isPointContained(T, A, B, infinite?): boolean

• check if point T is on the segment or line defined between A and B

  Parameters

  • T: Point

    the point we are checking for

  • A: Point

    one extremity of the segment

  • B: Point

    the other extremity of the segment

  • Optional infinite: boolean = false

    if true checks if T is on the line defined by A and B

  Returns boolean

  true if T is contained

Static isPointInPolygon

• isPointInPolygon(point, points): boolean

• Use the ray casting algorithm to determine if point is in the polygon defined by points

  Parameters

  • point: Point

  • points: Point[]

    polygon points

  Returns boolean

  See

  https://en.wikipedia.org/wiki/Point_in_polygon