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Saqoosha/keyframebin.js

Last active November 16, 2015 02:18
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  1. Saqoosha revised this gist Nov 16, 2015. 1 changed file with 12 additions and 0 deletions.
    12 changes: 12 additions & 0 deletions output
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,12 @@
    position
    quaternion
    scale
    face_vertices
    eyemouth_vertices
    length 3223692
    min -1.729493 max 663.247126
    0
    65535
    -1.729493
    663.247126
    MAE 0.002579241523183628
  2. Saqoosha created this gist Nov 16, 2015.
    56 changes: 56 additions & 0 deletions keyframebin.js
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    Original file line number Diff line number Diff line change
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    var fs = require('fs')
    var data = JSON.parse(fs.readFileSync('keyframes.json'))
    for (var key in data.user.property) {
    console.log(key)
    }

    // console.log(data.user.property.position)
    var position = data.user.property.position
    var vertices = []
    data.user.property.face_vertices.forEach((v) => {
    vertices.push.apply(vertices, v)
    })
    console.log('length', vertices.length)

    var min = Number.MAX_VALUE
    var max = Number.MIN_VALUE
    for (var i = 0; i < vertices.length; i++) {
    var v = vertices[i]
    if (v < min) min = v
    if (v > max) max = v
    }
    console.log('min', min, 'max', max)

    function mapToShort(v, imin, imax) {
    return Math.round((v - imin) / (imax - imin) * 0xffff)
    }

    console.log(mapToShort(min, min, max))
    console.log(mapToShort(max, min, max))

    function mapToFloat(v, imin, imax) {
    return (imax - imin) * (v / 0xffff) + imin
    }

    console.log(mapToFloat(mapToShort(min, min, max), min, max))
    console.log(mapToFloat(mapToShort(max, min, max), min, max))


    var sum = 0
    var buffer = new Buffer(vertices.length * 2)
    for (var i = 0; i < vertices.length; i++) {
    var v = mapToShort(vertices[i], min, max)
    buffer.writeUInt16LE(mapToShort(vertices[i], min, max), i * 2)
    var d = vertices[i] - mapToFloat(v, min, max)
    sum += Math.abs(d)
    }
    sum /= vertices.length
    console.log('MAE', sum)

    // var buffer = new Buffer(vertices.length * 4)
    // for (var i = 0; i < vertices.length; i++) {
    // buffer.writeFloatLE(vertices[i], i * 4)
    // }

    // fs.writeFileSync('position.json', JSON.stringify(vertices))
    fs.writeFileSync('position16.bin', buffer)