JavaScript must be enabled in order for you to use JSXGraph and JSXGraph reference. However, it seems JavaScript is either disabled or not supported by your browser.

Class Index | File Index

Elements

Classes


Element Curve

JXG.GeometryElement
   ↳ JXG.Curve
         ↳ Curve

This element is used to provide a constructor for curve, which is just a wrapper for element Curve. A curve is a mapping from R to R^2. t mapsto (x(t),y(t)). The graph is drawn for t in the interval [a,b].

The following types of curves can be plotted:



Defined in: curve.js.
Extends JXG.Curve.

Element Summary
Constructor Attributes Constructor Name and Description
 
Attributes Summary
Field Attributes Field Name and Description
 
The curveType is set in JXG.Curve#generateTerm and used in JXG.Curve#updateCurve.
 
If true use a recursive bisection algorithm.
 
If true use the algorithm by Gillam and Hohenwarter, which was default until version 0.98.
 
The data points of the curve are not connected with straight lines but with bezier curves.
 
Number of points used for plotting triggered by up events in case Curve#doAdvancedPlot is false.
 
Number of points used for plotting triggered by move events in case Curve#doAdvancedPlot is false.
 
Apply Ramer-Douglas-Peuker smoothing.
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
Element Detail
Curve
This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create with type "curve".

Possible parent array combinations are:
{function|number} x
{function|number} y
{function|number} a   Optional
{function|number} b   Optional

Parent elements for Parametric Curves.

x describes the x-coordinate of the curve. It may be a function term in one variable, e.g. x(t). In case of x being of type number, x(t) is set to a constant function. this function at the values of the array.

y describes the y-coordinate of the curve. In case of a number, y(t) is set to the constant function returning this number.

Further parameters are an optional number or function for the left interval border a, and an optional number or function for the right interval border b.

Default values are a=-10 and b=10.



{array} x
{array|function|number} y

Parent elements for Data Plots.

x and y are arrays contining the x and y coordinates of the data points which are connected by line segments. The individual entries of x and y may also be functions. In case of x being an array the curve type is data plot, regardless of the second parameter and if additionally the second parameter y is a function term the data plot evaluates.



{function} r
{array|function|number} offset   Optional
{function|number} a   Optional
{function|number} b   Optional

Parent elements for Polar Curves.

The first parameter is a function term r(phi) describing the polar curve.

The second parameter is the offset of the curve. It has to be an array containing numbers or functions describing the offset. Default value is the origin [0,0].

Further parameters are an optional number or function for the left interval border a, and an optional number or function for the right interval border b.

Default values are a=-10 and b=10.



See:
JXG.Curve
Examples:
// Parametric curve
// Create a curve of the form (t-sin(t), 1-cos(t), i.e.
// the cycloid curve.
  var graph = board.create('curve',
                       [function(t){ return t-Math.sin(t);},
                        function(t){ return 1-Math.cos(t);},
                        0, 2*Math.PI]
                    );

				
				
// Data plots
// Connect a set of points given by coordinates with dashed line segments.
// The x- and y-coordinates of the points are given in two separate
// arrays.
  var x = [0,1,2,3,4,5,6,7,8,9];
  var y = [9.2,1.3,7.2,-1.2,4.0,5.3,0.2,6.5,1.1,0.0];
  var graph = board.create('curve', [x,y], {dash:2});

				
				
// Polar plot
// Create a curve with the equation r(phi)= a*(1+phi), i.e.
// a cardioid.
  var a = board.create('slider',[[0,2],[2,2],[0,1,2]]);
  var graph = board.create('curve',
                       [function(phi){ return a.Value()*(1-Math.cos(phi));},
                        [1,0],
                        0, 2*Math.PI]
                    );

				
				
 // Draggable Bezier curve
 var col, p, c;
 col = 'blue';
 p = [];
 p.push(board.create('point',[-2, -1 ], {size: 5, strokeColor:col, fillColor:col}));
 p.push(board.create('point',[1, 2.5 ], {size: 5, strokeColor:col, fillColor:col}));
 p.push(board.create('point',[-1, -2.5 ], {size: 5, strokeColor:col, fillColor:col}));
 p.push(board.create('point',[2, -2], {size: 5, strokeColor:col, fillColor:col}));

 c = board.create('curve', JXG.Math.Numerics.bezier(p),
             {strokeColor:'red', name:"curve", strokeWidth:5, fixed: false}); // Draggable curve
 c.addParents(p);

				
                
Attribute Detail
{String} curveType
The curveType is set in JXG.Curve#generateTerm and used in JXG.Curve#updateCurve. Possible values are Only parameter and plot are set directly. Polar is set with JXG.GeometryElement#setAttribute only.
Defined in: options.js.
Default Value:
null

{Boolean} doAdvancedPlot
If true use a recursive bisection algorithm. It is slower, but usually the result is better. It tries to detect jumps and singularities.
Defined in: options.js.
Default Value:
true

{Boolean} doAdvancedPlotOld
If true use the algorithm by Gillam and Hohenwarter, which was default until version 0.98.
Defined in: options.js.
See:
Curve#doAdvancedPlot
Default Value:
false

{Boolean} handDrawing
The data points of the curve are not connected with straight lines but with bezier curves.
Defined in: options.js.
Default Value:
false

{Number} numberPointsHigh
Number of points used for plotting triggered by up events in case Curve#doAdvancedPlot is false.
Defined in: options.js.
See:
Curve#doAdvancedPlot
Default Value:
1600

{Number} numberPointsLow
Number of points used for plotting triggered by move events in case Curve#doAdvancedPlot is false.
Defined in: options.js.
See:
Curve#doAdvancedPlot
Default Value:
400

{Boolean} RDPsmoothing
Apply Ramer-Douglas-Peuker smoothing.
Defined in: options.js.
Default Value:
false

Attributes borrowed from other Elements
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:
dataX, dataY, numberPoints, qdt
Fields borrowed from class JXG.GeometryElement:
_org_type, _pos, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, hasLabel, highlighted, id, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, stdform, subs, symbolic, traces, transformations, type, visProp

Methods borrowed from other Elements
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 other Elements
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
Documentation generated by JsDoc Toolkit 2.4.0 on Tue Jul 05 2016 11:01:12 GMT+0200 (CEST)