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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | 7x 3182x 2x 2x 2x 2x 5x 5x 5x 1x 3180x 3176x 4x 1x 7x | const Point = require('./Point');
/**
* Create a line object represnting a set of two points in 2D space.
*
* Line objects can be constructed by passing in either 4 numbers (startX, startY, endX, endY) - or
* two {@link Point} objects representing `start` and `end` respectively
*
* @class Line
*/
class Line {
/**
* Construct a Line using two {@link Point} objects
* .
* @param {Point} start An instance of {@link Point} containing X and Y co-ordinates
* @param {Point} end An instance of {@link Point} containing X and Y co-ordinates
* @memberof Line
*/
/**
* Construct a Line using 4 {@link number}s
*
* @param {number} startX Starting position on the X axis
* @param {number} startY Starting position on the Y axis
* @param {number} endX Ending position on the X axis
* @param {number} endY Ending position on the Y acis
* @memberof Line
*/
constructor (){
if (arguments.length === 4) {
/**
* @type {Point}
*/
this.start = {};
/**
* @type {Point}
*/
this.end = {};
[this.start.x, this.start.y, this.end.x, this.end.y] = arguments;
for(let argument_index in arguments) {
Eif(arguments.hasOwnProperty(argument_index)) {
let argument = arguments[argument_index];
if(typeof argument !== 'number'){
throw TypeError('When passing 4 arguments, only numbers may be passed');
}
}
}
} else if(arguments.length === 2) {
[this.start, this.end] = arguments;
} else {
throw Error('Please pass either two Point objects, or 4 integers to the constructor');
}
}
/**
* Get the line length
*
* @returns {number}
*
* @memberof Line
*/
getLength() {
return Math.sqrt(
Math.pow(this.start.x - this.end.x, 2) + Math.pow(this.start.y - this.end.y, 2)
);
}
}
/** @ignore */
module.exports = Line;
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