You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
22 lines
683 B
22 lines
683 B
'use strict'
|
|
|
|
/* A simple π estimation function using a Monte Carlo method
|
|
* For 0 to `points`, take 2 random numbers < 1, square and add them to
|
|
* find the area under that point in a 1x1 square. If that area is <= 1
|
|
* then it's *within* a quarter-circle, otherwise it's outside.
|
|
* Take the number of points <= 1 and multiply it by 4 and you have an
|
|
* estimate!
|
|
* Do this across multiple processes and average the results to
|
|
* increase accuracy.
|
|
*/
|
|
|
|
module.exports = function (points, callback) {
|
|
let inside = 0
|
|
, i = points
|
|
|
|
while (i--)
|
|
if (Math.pow(Math.random(), 2) + Math.pow(Math.random(), 2) <= 1)
|
|
inside++
|
|
|
|
callback(null, (inside / points) * 4)
|
|
}
|
|
|