obelisk.js/src/dimensions/SlopeDimension.js

JavaScript Library for Building Pixel Isometric Element with HTML5 Canvas

/*jslint node: true*/

'use strict';

var AbstractDimension = require('./AbstractDimension');

var SlopeDimension, p;
SlopeDimension = function (xAxis, yAxis) {
    this.initialize(xAxis, yAxis);
};
p = SlopeDimension.prototype = new AbstractDimension();

// constructor
p.initialize = function (xAxis, yAxis) {
    this.xAxis = xAxis || 30;
    this.yAxis = yAxis || 30;

    if (this.xAxis % 2 === 1 || this.yAxis % 2 === 1) {
        throw new Error('xAxis and yAxis must be even number');
    }

    if (this.xAxis <= 4 || this.yAxis <= 4) {
        throw new Error('dimension is too small');
    }

    return this;
};

p.toString = function () {
    return '[SlopeDimension]';
};

module.exports = SlopeDimension;