https://github.com/hughsk/face-normals

Given an array of triangles' vertices, return a `Float32Array` of their normal vectors.
https://github.com/hughsk/face-normals

Last synced: 12 days ago
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Given an array of triangles' vertices, return a `Float32Array` of their normal vectors.

• Host: GitHub
• URL: https://github.com/hughsk/face-normals
• Owner: hughsk
• Created: 2013-11-14T02:36:13.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2013-11-14T02:38:10.000Z (almost 11 years ago)
• Last Synced: 2024-10-17T16:40:30.528Z (22 days ago)
• Language: JavaScript
• Size: 184 KB
• Stars: 5
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# face-normals [![experimental](http://hughsk.github.io/stability-badges/dist/experimental.svg)](http://github.com/hughsk/stability-badges) #

Given an array of triangles' vertices, return a `Float32Array` of their normal

vectors. Helpful for quickly calculating the the normals of a mesh (assuming

it's made up of triangles).

[see the demo](http://hughsk.github.io/face-normals), and how it compares to

[`heightmap-mesher`](http://hughsk.github.io/heightmap-mesher)'s, for some

example usage.

## Installation ##

[![face-normals](https://nodei.co/npm/face-normals.png?mini=true)](https://nodei.co/npm/face-normals)

## Usage ##

### `require('face-normals')(triangles, [output])` ###

Takes an array-like list of `triangles`. Each vertex should take up 3 elements,

combined into groups of 3 to make each triangle. Optionally, you can pass in

an array-like `output` object to set the values directly. If not, a

`Float32Array` will be created for you - either way, the new/updated array will

be returned.