Element Reflection
JXG.GeometryElement
↳ Reflection
This element is used to construct reflected elements (points, lines, circles, curves, polygons).
Defined in: composition.js.
Extends
JXG.GeometryElement.
| Constructor Attributes | Constructor Name and Description |
|---|---|
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A reflected element (point, polygon, line or curve) is given by a given
object of the same type and a line of reflection.
|
| Field Attributes | Field Name and Description |
|---|---|
|
Attributes of circle center, i.e.
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Type of transformation.
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- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hasPoint, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, update, updateRenderer, updateVisibility, useLocale
- Events borrowed from class JXG.GeometryElement:
- attribute, attribute:key, down, drag, keydrag, mousedown, mousedrag, mousemove, mouseout, mouseover, mouseup, move, out, over, pendown, pendrag, penup, touchdown, touchdrag, touchup, up
Element Detail
Reflection
A reflected element (point, polygon, line or curve) is given by a given
object of the same type and a line of reflection.
It is determined by the reflection of the given element
across the given line.
-
This element has no direct constructor. To create an instance of this element you have to call JXG.Board#create
with type "reflection".
- Possible parent array combinations are:
-
{JXG.Point|JXG.Line|JXG.Curve|JXG.Polygon} p
{JXG.Line} l
- The reflection element is the reflection of p across the line l.
- Throws:
- {Error}
- If the element cannot be constructed with the given parent objects an exception is thrown.
- Examples:
var p1 = board.create('point', [0.0, 4.0]);
var p2 = board.create('point', [6.0, 1.0]);
var l1 = board.create('line', [p1, p2]);
var p3 = board.create('point', [3.0, 3.0]);
var rp1 = board.create('reflection', [p3, l1]);
// Reflection of more elements
// reflection line
var li = board.create('line', [1,1,1], {strokeColor: '#aaaaaa'});
var p1 = board.create('point', [-3,-1], {name: "A"});
var q1 = board.create('reflection', [p1, li], {name: "A'"});
var l1 = board.create('line', [1,-5,1]);
var l2 = board.create('reflection', [l1, li]);
var cu1 = board.create('curve', [[-3, -3, -2.5, -3, -3, -2.5], [-3, -2, -2, -2, -2.5, -2.5]], {strokeWidth:3});
var cu2 = board.create('reflection', [cu1, li], {strokeColor: 'red', strokeWidth:3});
var pol1 = board.create('polygon', [[-6,-3], [-4,-5], [-5,-1.5]]);
var pol2 = board.create('reflection', [pol1, li]);
var c1 = board.create('circle', [[-2,-2], [-2, -1]]);
var c2 = board.create('reflection', [c1, li]);
var a1 = board.create('arc', [[1, 1], [0, 1], [1, 0]], {strokeColor: 'red'});
var a2 = board.create('reflection', [a1, li], {strokeColor: 'red'});
var s1 = board.create('sector', [[-3.5,-3], [-3.5, -2], [-3.5,-4]], {
anglePoint: {visible:true}, center: {visible: true}, radiusPoint: {visible: true},
fillColor: 'yellow', strokeColor: 'black'});
var s2 = board.create('reflection', [s1, li], {fillColor: 'yellow', strokeColor: 'black', fillOpacity: 0.5});
var an1 = board.create('angle', [[-4,3.9], [-3, 4], [-3, 3]]);
var an2 = board.create('reflection', [an1, li]);
Attribute Detail
{center}
center
Attributes of circle center, i.e. the center of the circle,
if a circle is the mirror element and the transformation type is 'Euclidean'
Defined in: options.js.
Defined in: options.js.
{String}
type
Type of transformation. Possible values are 'Euclidean', 'projective'.
If the value is 'Euclidean', the reflected element of a circle is again a circle,
otherwise it is a conic section.
Defined in: options.js.
Defined in: options.js.
- Default Value:
- 'Euclidean'
Attributes borrowed from other Elements
- Attributes borrowed from class JXG.GeometryElement:
- dash, dashScale, draft, dragToTopOfLayer, fillColor, fillOpacity, fixed, frozen, gradient, gradientAngle, gradientCX, gradientCY, gradientEndOffset, gradientFR, gradientFX, gradientFY, gradientR, gradientSecondColor, gradientSecondOpacity, gradientStartOffset, highlight, highlightFillColor, highlightFillOpacity, highlightStrokeColor, highlightStrokeOpacity, highlightStrokeWidth, isLabel, layer, lineCap, needsRegularUpdate, nonnegativeOnly, precision, priv, rotatable, scalable, shadow, snapToGrid, strokeColor, strokeOpacity, strokeWidth, tabindex, trace, traceAttributes, transitionDuration, transitionProperties, viewport, visible, withLabel
Fields borrowed from other Elements
- Fields borrowed from class JXG.GeometryElement:
- _org_type, _pos, ancestors, baseElement, board, childElements, descendants, dump, elementClass, elType, hasLabel, highlighted, id, inherits, isDraggable, isReal, lastDragTime, methodMap, mouseover, name, needsUpdate, notExistingParents, numTraces, parents, quadraticform, rendNode, stdform, subs, symbolic, traces, transformations, visProp, visPropCalc
Methods borrowed from other Elements
- Methods borrowed from class JXG.GeometryElement:
- _set, addChild, addDescendants, addParents, addParentsFromJCFunctions, addRotation, addTicks, addTransform, animate, bounds, clearTrace, cloneToBackground, countChildren, createGradient, createLabel, draggable, formatNumberLocale, fullUpdate, generatePolynomial, getAttribute, getAttributes, getLabelAnchor, getName, getParents, getProperty, getSnapSizes, getTextAnchor, getType, handleSnapToGrid, hasPoint, hide, hideElement, noHighlight, normalize, prepareUpdate, remove, removeAllTicks, removeChild, removeDescendants, removeTicks, resolveShortcuts, setArrow, setAttribute, setDash, setDisplayRendNode, setLabel, setLabelText, setName, setParents, setPosition, setPositionDirectly, setProperty, show, showElement, snapToPoints, update, updateRenderer, updateVisibility, useLocale
Events borrowed from other Elements