JSXGraph Reference
ElementsElement Parabola
JXG.GeometryElement
↳ JXG.Curve
↳ Parabola
This element is used to provide a constructor for a parabola. A parabola is given by one point (the focus) and a line (the directrix).
Defined in: conic.js.
Extends
JXG.Curve.
| Constructor Attributes | Constructor Name and Description |
|---|---|
- Methods borrowed from class JXG.Curve:
- addTransform, allocatePoints, checkReal, generateTerm, hasPoint, interpolationFunctionFromArray, isDistOK, isSegmentOutside, maxX, minX, notifyParents, setPosition, setPositionDirectly, update, updateCurve, updateDataArray, updateParametricCurve, updateParametricCurveNaive, updateRenderer, updateTransform, Z
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addRotation, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getTextAnchor, getType, hideElement, labelColor, noHighlight, normalize, off, on, prepareUpdate, remove, removeChild, removeDescendants, resolveShortcuts, setArrow, setAttribute, setDash, setLabelText, showElement, triggerEventHandlers
- Events borrowed from class JXG.GeometryElement:
- attribute, attribute:<attribute><attribute>, down, drag, mousedown, mousedrag, mousemove, mouseout, mouseover, mouseup, move, out, over, touchdown, touchdrag, touchup, up
Element Detail
Parabola
-
This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create
with type "parabola".
- Possible parent array combinations are:
-
{JXG.Point|array} point
{JXG.Line} line
- Parent elements are a point and a line. Optional parameters three and four are numbers which define the curve length (e.g. start/end). Default values are -pi and pi.
- Throws:
- {Exception}
- If the element cannot be constructed with the given parent objects an exception is thrown.
- Examples:
// Create a parabola by a point C and a line l.
var A = board.create('point', [-1,4]);
var B = board.create('point', [-1,-4]);
var l = board.create('line', [A,B]);
var C = board.create('point', [1,1]);
var el = board.create('parabola',[C,l]);
Attributes borrowed from other Elements
- Attributes borrowed from class JXG.Curve:
- curveType, handDrawing
- Attributes borrowed from class JXG.GeometryElement:
- dash, draft, fillColor, fillOpacity, fixed, frozen, highlight, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, needsRegularUpdate, scalable, shadow, snapToGrid, strokeColor, strokeOpacity, strokeWidth, trace, traceAttributes, visible, withLabel
Fields borrowed from other Elements
- Fields borrowed from class JXG.Curve:
- numberPoints
- Fields borrowed from class JXG.GeometryElement:
- _pos, addEvent, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, eventHandlers, getProperty, hasLabel, highlighted, id, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, quadraticform, removeEvent, rendNode, setProperty, stdform, subs, symbolic, traces, transformations, type, visProp
Methods borrowed from other Elements
- Methods borrowed from class JXG.Curve:
- addTransform, allocatePoints, checkReal, generateTerm, hasPoint, interpolationFunctionFromArray, isDistOK, isSegmentOutside, maxX, minX, notifyParents, setPosition, setPositionDirectly, update, updateCurve, updateDataArray, updateParametricCurve, updateParametricCurveNaive, updateRenderer, updateTransform, Z
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addRotation, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getTextAnchor, getType, hideElement, labelColor, noHighlight, normalize, off, on, prepareUpdate, remove, removeChild, removeDescendants, resolveShortcuts, setArrow, setAttribute, setDash, setLabelText, showElement, triggerEventHandlers
Events borrowed from other Elements