Workaround GLSL function for using 3D textures in WebGL
npm install webgl-texture3dWorkaround for the lack of sampler3D (3D textures) in WebGL -
sourced from this example,
and modified for use with browserify.
`` bash`
npm install webgl-texture3d
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')
``
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