https://github.com/hughsk/webgl-texture3d

Workaround GLSL function for using 3D textures in WebGL
https://github.com/hughsk/webgl-texture3d

Last synced: 7 days ago
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Workaround GLSL function for using 3D textures in WebGL

• Host: GitHub
• URL: https://github.com/hughsk/webgl-texture3d
• Owner: hughsk
• Created: 2013-02-16T04:54:51.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-02-16T05:21:46.000Z (over 11 years ago)
• Last Synced: 2024-10-17T16:37:42.751Z (22 days ago)
• Language: JavaScript
• Size: 95.7 KB
• Stars: 5
• Watchers: 4
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# webgl-texture3d

Workaround for the lack of `sampler3D` (3D textures) in WebGL -

sourced from [this example](https://code.google.com/p/webglsamples/source/browse/color-adjust/color-adjust.html),

and modified for use with [browserify](http://browserify.org/).

## Installation ##

``` bash

npm install webgl-texture3d

```

## Usage ##

**texture3d(name, resolution)**

Returns a GLSL method string, with the size cached at `resolution` pixels wide/high/deep.

**texture3d.dynamic**

Plain `sampleAs3DTexture` method string.

``` javascript

var texture3d = require('webgl-texture3d')

  , sampleAs3DTexture = texture3d('sampleAs3DTexture', 33)

var vertexShader = [

  'uniform sampler2D colorTable;'

, 'uniform sampler2D source;'

, 'uniform vec2 pixel;'

, sampleAs3DTexture

, 'void main() {'

  , 'vec4 texel = texture2D(source, pixel);'

  , 'gl_FragColor = sampleAs3DTexture(colorTable, texel.rgb);'

, '}'

].join('\n')

```

## License ##

Copyright 2011, Google Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are

met:

    * Redistributions of source code must retain the above copyright

notice, this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above

copyright notice, this list of conditions and the following disclaimer

in the documentation and/or other materials provided with the

distribution.

    * Neither the name of Google Inc. nor the names of its

contributors may be used to endorse or promote products derived from

this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.