https://github.com/mikolalysenko/extract-frustum-planes

Extracts the planes for a WebGL viewing frustum
https://github.com/mikolalysenko/extract-frustum-planes

Last synced: about 2 months ago
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Extracts the planes for a WebGL viewing frustum

• Host: GitHub
• URL: https://github.com/mikolalysenko/extract-frustum-planes
• Owner: mikolalysenko
• License: mit
• Created: 2013-10-10T23:28:43.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2014-06-19T15:22:01.000Z (over 10 years ago)
• Last Synced: 2024-10-20T14:26:11.445Z (2 months ago)
• Language: JavaScript
• Size: 117 KB
• Stars: 6
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
extract-frustum-planes

======================

Returns a list of frustum planes from a given WebGL matrix (assuming the matrix is stored in the same format as used by [gl-matrix](https://github.com/toji/gl-matrix)).

## Install

    npm install extract-frustum-planes

## Example

```javascript

var getPlanes = require("extract-frustum-planes")

var glm = require("gl-matrix")

var m = glm.mat4.perspective()

```

## API

### `require("extract-frustum-planes")(worldToClip[, zNear, zFar])`

Extracts the frustum planes of the combined world to clip coordinate matrix for WebGL

* `worldToClip` is the concatenated model-view-projection matrix in the same format as expected by WebGL (ie compatible with gl-matrix)

* `zNear` is the near clip plane distance as set by `gl.depthRange` (default 0.0)

* `zFar` is the far clip plane distance as set by `gl.depthRange`

**Returns** An array of 6 planes encoding the view frustum stored in the order:

* `left`

* `right`

* `top`

* `bottom`

* `near`

* `far`

## Credits

(c) 2013 Mikola Lysenko. MIT License