Class Parabola
Extends
JXG.Curve.
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.
Constructor Attributes | Constructor Name and Description |
---|---|
Parabola(point,line)
|
- Fields borrowed from class JXG.Curve:
- curveType, handDrawing, numberPoints
- Fields borrowed from class JXG.GeometryElement:
- addEvent, ancestors, board, childElements, descendants, draft, dump, elementClass, elType, eventHandlers, fillOpacity, fixed, frozen, getAttribute, hasLabel, highlighted, highlightFillOpacity, highlightStrokeOpacity, highlightStrokeWidth, id, isDraggable, isReal, methodMap, mouseover, name, needsRegularUpdate, needsUpdate, notExistingParents, numTraces, quadraticform, removeEvent, scalable, stdform, strokeOpacity, subs, symbolic, trace, traceAttributes, traces, transformations, type, visProp, withLabel
- Methods borrowed from class JXG.Curve:
- addTransform, allocatePoints, generateTerm, hasPoint, isDistOK, isSegmentOutside, maxX, minX, notifyParents, setPosition, setPositionDirectly, update, updateCurve, updateDataArray, updateParametricCurve, updateParametricCurveNaive, updateRenderer, updateTransform, Z
- Methods borrowed from class JXG.GeometryElement:
- addChild, addRotation, animate, bounds, clearTrace, cloneToBackground, createLabel, dash, fillColor, getAttributes, getLabelAnchor, getName, getParents, getProperty, getTextAnchor, getType, hideElement, highlight, highlightFillColor, highlightStrokeColor, labelColor, noHighlight, off, on, remove, resolveShortcuts, setArrow, setAttribute, setLabelText, setProperty, shadow, showElement, snapToGrid, strokeColor, strokeWidth, triggerEventHandlers, visible
- 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)
// 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]);
- 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.