Element Intersection
JXG.GeometryElement,JXG.CoordsElement
↳ JXG.Point
↳ Intersection
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.
Defined in: point.js.
Extends
JXG.Point.
| Constructor Attributes | Constructor Name and Description |
|---|---|
| Field Attributes | Field Name and Description |
|---|---|
| <static> |
Intersection.alwaysIntersect
Used in JXG.Intersection.
|
| Field Attributes | Field Name and Description |
|---|---|
| <private> <static> |
Intersection.intersectionNumbers
Array of length 2 containing the numbers i and j.
|
- Methods borrowed from class JXG.Point:
- face, hasPoint, isOn, makeIntersection, normalizeFace, setStyle, size, update, updateRenderer, updateTransform
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, bounds, clearTrace, clearTransforms, cloneToBackground, countChildren, createGradient, createLabel, draggable, eval, evalVisProp, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, removeTransform, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, toTopOfLayer, updateVisibility, useLocale
- Methods borrowed from class JXG.CoordsElement:
- _anim, addAnchor, addConstraint, Coords, Dist, findClosestSnapValue, free, handleAttractors, handleSnapToPoints, makeGlider, moveAlong, moveAlongES6, moveTo, moveToES6, popSlideObject, setGliderPosition, setPositionByTransform, updateConstraint, updateCoords, updateGlider, updateGliderFromParent, visit, visitES6, X, XEval, Y, YEval, Z, ZEval
- Events borrowed from class JXG.GeometryElement:
- attribute, attribute:key, down, drag, keydrag, mousedown, mousedrag, mousemove, mouseout, mouseover, mouseup, move, out, over, pendown, pendrag, penup, touchdown, touchdrag, touchup, up
Element Detail
Intersection
-
This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create
with type "intersection".
- Possible parent array combinations are:
-
{JXG.Line|JXG.Circle} el1
{JXG.Line|JXG.Circle} el2
{Number|Function} i
- The result will be a intersection point on el1 and el2. i determines the
intersection point if two points are available:
- i==0: use the positive square root,
- i==1: use the negative square root.
- Throws:
- {Exception}
- If the element cannot be constructed with the given parent objects an exception is thrown.
- Examples:
// 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]);
Attribute Detail
<static>
{Boolean}
Intersection.alwaysIntersect
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.
Defined in: options.js.
- Default Value:
- true
Field Detail
<private> <static>
{Array}
Intersection.intersectionNumbers
Array of length 2 containing the numbers i and j.
The intersection point is i-th intersection point.
j is unused.
Attributes borrowed from other Elements
- Attributes borrowed from class JXG.GeometryElement:
- aria, clip, cssClass, dash, dashScale, draft, dragToTopOfLayer, element3D, fillColor, fillOpacity, fixed, frozen, gradient, gradientAngle, gradientCX, gradientCY, gradientEndOffset, gradientFR, gradientFX, gradientFY, gradientR, gradientSecondColor, gradientSecondOpacity, gradientStartOffset, highlight, highlightCssClass, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, ignoreForLabelAutoposition, isLabel, layer, lineCap, needsRegularUpdate, nonnegativeOnly, precision, priv, rotatable, scalable, shadow, snapToGrid, strokeColor, strokeOpacity, strokeWidth, tabindex, trace, traceAttributes, transitionDuration, transitionProperties, visible, withLabel
Fields borrowed from other Elements
- Fields borrowed from class JXG.GeometryElement:
- _org_type, _pos, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, hasLabel, highlighted, id, inherits, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, stdform, subs, symbolic, traces, transformations, type, visProp, visPropCalc
- Fields borrowed from class JXG.CoordsElement:
- coords, groups, isConstrained, needsUpdateFromParent, onPolygon, position, slideObject, slideObjects
Methods borrowed from other Elements
- Methods borrowed from class JXG.Point:
- face, hasPoint, isOn, makeIntersection, normalizeFace, setStyle, size, update, updateRenderer, updateTransform
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, bounds, clearTrace, clearTransforms, cloneToBackground, countChildren, createGradient, createLabel, draggable, eval, evalVisProp, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, removeTransform, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, toTopOfLayer, updateVisibility, useLocale
- Methods borrowed from class JXG.CoordsElement:
- _anim, addAnchor, addConstraint, Coords, Dist, findClosestSnapValue, free, handleAttractors, handleSnapToPoints, makeGlider, moveAlong, moveAlongES6, moveTo, moveToES6, popSlideObject, setGliderPosition, setPositionByTransform, updateConstraint, updateCoords, updateGlider, updateGliderFromParent, visit, visitES6, X, XEval, Y, YEval, Z, ZEval
Events borrowed from other Elements