Intersection

Element

A point intersecting two 1-dimensional elements.

It is one point of the set consisting of the intersection points of the two elements. The following element types can be (mutually) intersected: line, circle, curve, polygon, polygonal chain.

Usage (signatures)

board.create('intersection', [el1, el2, iopt]);

Intersect two elements el1 and el2. The optional parameter i determines the intersection point if two points are available:

i==0: use the positive square root,
i==1: use the negative square root.

Parameters

Name	Type	Attributes	Default
`el1`	Circle \| Curve \| Line \| Polygon \| PolygonalChain
`el2`	Circle \| Curve \| Line \| Polygon \| PolygonalChain
`i`	NumberLike	<optional>	`0`

Example

Create an intersection point of circle and line

var p1 = board.create('point', [4.0, 4.0]);
var c1 = board.create('circle', [p1, 2.0]);

var p2 = board.create('point', [1.0, 1.0]);
var p3 = board.create('point', [5.0, 3.0]);
var l1 = board.create('line', [p2, p3]);

var i = board.create('intersection', [c1, l1, 0]);

Attributes

Own

alwaysIntersect

Description

Used in JXG.Intersection. This flag sets the behaviour of intersection points of a segment with another object. If true, the segment is treated as an (infinte) line. If false the intersection point exists if the segment intersects the other object setwise.

Here, JSXGraph distinguishes whether the object is a segment or a line wlement that is displayed as a segment (with staightFirst = straightLast = true). In the latter case, the object is always treated like an infinite line, regardless if it appears like a segment or an infinite line.

Intersection

Parameters

Example

Own

alwaysIntersect

Inherited

Own

(private, static) intersectionNumbers : Array

Inherited

Own

Inherited

Own

Inherited

Throws

Details

Extends