openseadragon/src/point.js

(function( $ ){

$.Point = function(x, y) {
    this.x = typeof (x) == "number" ? x : 0;
    this.y = typeof (y) == "number" ? y : 0;
};

$.Point.prototype = {

    plus: function( point ) {
        return new $.Point(
            this.x + point.x, 
            this.y + point.y
        );
    },

    minus: function( point ) {
        return new $.Point(
            this.x - point.x, 
            this.y - point.y
        );
    },

    times: function( factor ) {
        return new $.Point(
            this.x * factor, 
            this.y * factor
        );
    },

    divide: function( factor ) {
        return new $.Point(
            this.x / factor, 
            this.y / factor
        );
    },

    negate: function() {
        return new $.Point( -this.x, -this.y );
    },

    distanceTo: function( point ) {
        return Math.sqrt(
            Math.pow( this.x - point.x, 2 ) +
            Math.pow( this.y - point.y, 2 )
        );
    },

    apply: function( func ) {
        return new $.Point( func(this.x), func(this.y) );
    },

    equals: function( point ) {
        return  ( point instanceof $.Point ) &&
                ( this.x === point.x ) && 
                ( this.y === point.y );
    },

    toString: function() {
        return "(" + this.x + "," + this.y + ")";
    }
};

}( OpenSeadragon ));