https://github.com/hughsk/triangle-normal

Get a 3D triangle's normal vector
https://github.com/hughsk/triangle-normal

Last synced: 12 days ago
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Get a 3D triangle's normal vector

• Host: GitHub
• URL: https://github.com/hughsk/triangle-normal
• Owner: hughsk
• License: other
• Created: 2013-09-07T06:02:48.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2013-09-07T06:02:56.000Z (about 11 years ago)
• Last Synced: 2024-10-17T16:38:56.244Z (22 days ago)
• Language: JavaScript
• Size: 102 KB
• Stars: 4
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

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

Takes a list of vertices in a triangle, and returns the normal vector for that

triangle. Doesn't handle degenerate triangles.

## Installation ##

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

## Usage ##

### `require('triangle-normal')(vertices..., [output])` ###

The first 9 arguments are for the points on your triangle, with an optional

`output` array to set the resulting parameters. If an `ouput` is not supplied,

a new array will be created, and either way this array will be returned as the

result of the function, e.g.:

``` javascript

var normal = require('triangle-normal')

var output = [0, 0, 0]

var vectors = [

    { x: 0, y: 0, z: 0 }

  , { x: 1, y: 0, z: 0 }

  , { x: 0, y: 1, z: 0 }

]

normal(

  vectors[0].x, vectors[0].y, vectors[0].z,

  vectors[1].x, vectors[1].y, vectors[1].z,

  vectors[2].x, vectors[2].y, vectors[2].z,

  output

)

```