Class Parabola
JXG.GeometryElement
↳ JXG.Curve
↳ Conic
↳ 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
Conic.
Constructor Attributes | Constructor Name and Description |
---|---|
Parabola(point,line)
|
- Fields borrowed from class Conic:
- foci
- Fields borrowed from class JXG.Curve:
- dataX, dataY, numberPoints, qdt
- Fields borrowed from class JXG.GeometryElement:
- _org_type, _pos, ancestors, baseElement, board, childElements, dash, descendants, draft, dump, elementClass, elType, fillColor, fillOpacity, fixed, frozen, hasLabel, highlight, highlighted, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, id, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsRegularUpdate, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, scalable, shadow, snapToGrid, stdform, strokeColor, strokeOpacity, strokeWidth, subs, symbolic, trace, traceAttributes, traces, transformations, type, visible, visProp, withLabel
- Fields borrowed from class Conic:
- foci
- Fields borrowed from class JXG.Curve:
- dataX, dataY, numberPoints, qdt
- Fields borrowed from class JXG.GeometryElement:
- _org_type, _pos, ancestors, baseElement, board, childElements, dash, descendants, draft, dump, elementClass, elType, fillColor, fillOpacity, fixed, frozen, hasLabel, highlight, highlighted, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, id, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsRegularUpdate, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, scalable, shadow, snapToGrid, stdform, strokeColor, strokeOpacity, strokeWidth, subs, symbolic, trace, traceAttributes, traces, transformations, type, visible, visProp, withLabel
- Methods borrowed from class JXG.Curve:
- _borderCase, _insertPoint, _intersectWithBorder, _isOutside, _isUndefined, _plotRecursive, _triangleDists, addTransform, allocatePoints, checkReal, generateTerm, hasPoint, interpolationFunctionFromArray, isDistOK, isSegmentDefined, isSegmentOutside, maxX, minX, notifyParents, update, updateCurve, updateDataArray, updateParametricCurve, updateParametricCurveNaive, updateParametricCurveOld, updateRenderer, updateTransform, X, Y, Z
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addParents, addRotation, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getTextAnchor, getType, handleSnapToGrid, hideElement, labelColor, noHighlight, normalize, prepareUpdate, remove, removeChild, removeDescendants, resolveShortcuts, setArrow, setAttribute, setDash, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, showElement, snapToPoints
- 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
Class Detail
Parabola(point,line)
- Parameters:
- {JXG.Point|array_JXG.Line} point,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]);