https://github.com/mikolalysenko/rsqrt

Quake style 1.0/sqrt(x)
https://github.com/mikolalysenko/rsqrt

Last synced: 6 days ago
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Quake style 1.0/sqrt(x)

• Host: GitHub
• URL: https://github.com/mikolalysenko/rsqrt
• Owner: mikolalysenko
• License: mit
• Created: 2013-04-04T16:31:42.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-05-14T00:13:30.000Z (over 11 years ago)
• Last Synced: 2024-12-16T22:35:36.831Z (9 days ago)
• Language: JavaScript
• Size: 105 KB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
rsqrt

=====

An attempt to port [Quake's fast inverse square root](http://en.wikipedia.org/wiki/Fast_inverse_square_root) to JS.  Do not ever use this.

## Install:

    npm install rsqrt

## Example:

```javascript

console.log(require("rsqrt")(100.0))  //Prints out approximately 0.1

```

## `require("rsqrt")(number)`

Computes an approximation for `1.0 / Math.sqrt(number)`

## Should I ever use this?

No.  `1.0 / Math.sqrt` is at least twice as fast.

## Why did you publish this?

To warn others.

## Credits

(c) 2013 Mikola Lysenko. MIT License