Add custom methods to objects: Difference between revisions
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Latest revision as of 19:39, 25 June 2015
JSXGraph objects can be extended to support your own custom method. For example, to add a method called isAlmostOrigin() to the Point objects, write the following code :
JXG.extend(JXG.Point.prototype, {
isAlmostOrigin: function () {
return Math.abs(this.X()) < 0.5 && Math.abs(this.Y()) < 0.5
}
})
board = JXG.JSXGraph.initBoard('box', { axis:true })
A = board.create('point', [1, 0], {name:'A'});
alert(A.isAlmostOrigin()) // false
