JSXGraph Reference
ElementsElement Line
JXG.GeometryElement
↳ JXG.Line
↳ Line
This element is used to provide a constructor for a general line. A general line is given by two points. By setting additional properties
a line can be used as an arrow and/or axis.
Defined in: Line.js.
Extends
JXG.Line.
| Constructor Attributes | Constructor Name and Description |
|---|---|
Element Detail
Line
-
This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create
with type "line".
- Possible parent array combinations are:
-
{JXG.Point|array|function} point1
{JXG.Point|array|function} point2
- Parent elements can be two elements either of type JXG.Point or array of numbers describing the coordinates of a point. In the latter case the point will be constructed automatically as a fixed invisible point. It is possible to provide a function returning an array or a point, instead of providing an array or a point.
-
{Number|function} a
{Number|function} b
{Number|function} c
- A line can also be created providing three numbers. The line is then described by the set of solutions of the equation a*x+b*y+c*z = 0. It is possible to provide three functions returning numbers, too.
-
{function} f
- This function must return an array containing three numbers forming the line's homogeneous coordinates.
- Throws:
- {Exception}
- If the element cannot be constructed with the given parent objects an exception is thrown.
- Examples:
// Create a line using point and coordinates/
// The second point will be fixed and invisible.
var p1 = board.create('point', [4.5, 2.0]);
var l1 = board.create('line', [p1, [1.0, 1.0]]);
// Create a line using three coordinates
var l1 = board.create('line', [1.0, -2.0, 3.0]);
Attributes borrowed from other Elements
- Attributes borrowed from class JXG.GeometryElement:
- dash, draft, fillColor, fillOpacity, fixed, frozen, highlight, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, needsRegularUpdate, shadow, strokeColor, strokeOpacity, strokeWidth, trace, traceAttributes, visible, withLabel
Fields borrowed from other Elements
- Fields borrowed from class JXG.Line:
- defaultTicks, parentPolygon, point1, point2, ticks
- Fields borrowed from class JXG.GeometryElement:
- addEvent, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, eventHandlers, getAttribute, hasLabel, highlighted, id, isDraggable, isReal, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, quadraticform, removeEvent, stdform, subs, symbolic, traces, transformations, type, visProp
Methods borrowed from other Elements
- Methods borrowed from class JXG.Line:
- addTicks, addTransform, generatePolynomial, getAngle, getRise, getSlope, hasPoint, maxX, minX, removeAllTicks, removeTicks, setLabelRelativeCoords, setPosition, setPositionDirectly, setStraight, update, updateRenderer, updateSegmentFixedLength, updateStdform, X, Y, Z
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, getAttributes, getLabelAnchor, getName, getParents, getProperty, getTextAnchor, getType, hideElement, labelColor, noHighlight, normalize, off, on, prepareUpdate, remove, resolveShortcuts, setArrow, setAttribute, setDash, setLabelText, setProperty, showElement, triggerEventHandlers