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const commandLineArgs = require('command-line-args');
const commandLineUsage = require('command-line-usage');
const fs = require('fs');
// usage:
// node glavatar-pipeline.js foo.gltf [-S|--skeleton|-s|--skin]
const optionDefinitions = [
{
name: 'help',
alias: 'h',
type: Boolean,
description: 'Display this usage guide.'
},
{
name: 'gltf',
type: String,
defaultOption: true,
description: 'The input gltf file to process',
typeLabel: '<file>'
},
{
name: 'skeleton',
alias: 'S',
type: Boolean,
description: 'if this gltf file is a skeleton file'
},
{
name: 'skin',
alias: 's',
type: Boolean,
defaultValue: true,
description: 'if this gltf file is a skin file'
},
{
name: 'outputFilename',
alias: 'o',
type: String,
description: 'output filename'
}
];
const options = commandLineArgs(optionDefinitions);
if (options.help) {
const usage = commandLineUsage([
{
header: 'glAvatar Pipeline',
content: 'Handful tool to modify glTF files with ones with glAvatar extensions'
},
{
header: 'Options',
optionList: optionDefinitions
}
]);
console.log(usage);
} else {
let gltf = JSON.parse(fs.readFileSync(options.gltf));
if (Array.isArray(gltf.extensionsUsed)) {
gltf.extensionsUsed.push('gl_avatar');
} else {
gltf.extensionsUsed = ['gl_avatar'];
}
let outputFilename = options.outputFilename || 'output.gltf';
if (options.skeleton) {
// console.log('skeleton');
gltf.extensionsUsed = gltf.extensionsUsed || {};
gltf.extensionsUsed.push('gl_avatar');
gltf.extensions = gltf.extensions || {};
// sort of hard coded
gltf.extensions.gl_avatar = {
type: 'skeleton',
skins: {
main: 0
}
};
// add bodyidlut
} else if (options.skin) {
// console.log('skin');
// gltf.extensionsUsed = gltf.extensionsUsed || {};
// gltf.extensionsUsed.push('gl_avatar');
// root extensions
gltf.extensions = gltf.extensions || {};
gltf.extensions.gl_avatar = {
visibility: [
0,
1, 1, 1, 1, 1,
1, 1, 1, 1, 1,
1, 1, 1, 1, 1,
1, 1, 1, 1, 1,
1, 1, 1, 1, 1,
1, 1, 1, 1, 1
],
type: 'skin'
};
// parse mesh and primitive, move JOINT and WEIGHT to extensions
for (let i = 0, leni = gltf.meshes.length; i < leni; i++) {
let mesh = gltf.meshes[i];
for (let j = 0, lenj = mesh.primitives.length; j < lenj; j++) {
let primitive = mesh.primitives[j];
if (primitive.attributes.JOINTS_0 !== undefined) {
if (!primitive.extensions) {
primitive.extensions = {};
}
primitive.extensions.gl_avatar = {
'attributes': {
'JOINTS_0': primitive.attributes.JOINTS_0
}
};
delete primitive.attributes.JOINTS_0;
if (primitive.attributes.WEIGHTS_0 !== undefined) {
primitive.extensions.gl_avatar.attributes.WEIGHTS_0 = primitive.attributes.WEIGHTS_0;
delete primitive.attributes.WEIGHTS_0;
}
if (primitive.attributes.JOINTS_1 !== undefined) {
primitive.extensions.gl_avatar.attributes.JOINTS_1 = primitive.attributes.JOINTS_1;
delete primitive.attributes.JOINTS_1;
}
if (primitive.attributes.WEIGHTS_1 !== undefined) {
primitive.extensions.gl_avatar.attributes.WEIGHTS_1 = primitive.attributes.WEIGHTS_1;
delete primitive.attributes.WEIGHTS_1;
}
}
}
}
// parse nodes, move skin to extensions
// assume only one joint array (skeleton)
for (let i = 0, leni = gltf.nodes.length; i < leni; i++) {
let node = gltf.nodes[i];
if (node.skin !== undefined) {
if (!node.extensions) {
node.extensions = {};
}
node.extensions.gl_avatar = {
// 'skin': {
// 'name': 'main', //temp
// 'inverseBindMatrices': gltf.skins[node.skin].inverseBindMatrices
// }
'skin': 0 //temp
}
delete node.skin;
}
}
// put skin info in root extensions
var ls = gltf.extensions.gl_avatar.linkedSkeletons = gltf.skins;
// for (let i = 0, leni = ls.length; i < leni; i++) {
var i = 0;
ls[i].skeleton = 'main';
// }
// TODO: remove skin related nodes
delete gltf.skins;
// delete ls.joints;
fs.writeFileSync(outputFilename, JSON.stringify(gltf));
} else {
console.error('A glTF file must either be a skeleton file or skin file.');
}
}
// console.log(gltf);
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