gltf-pipeline/lib/removeDefaults.js

Content pipeline tools for optimizing glTF assets.

'use strict';
const Cesium = require('cesium');
const ForEach = require('./ForEach');

const defined = Cesium.defined;
const Matrix4 = Cesium.Matrix4;

module.exports = removeDefaults;

/**
 * Remove default values from the glTF. Not exhaustive.
 *
 * @param {Object} gltf A javascript object containing a glTF asset.
 * @returns {Object} glTF with default values removed.
 *
 * @private
 */
function removeDefaults(gltf) {
    ForEach.node(gltf, function(node) {
        if (defined(node.matrix) && Matrix4.equals(Matrix4.fromArray(node.matrix), Matrix4.IDENTITY)) {
            delete node.matrix;
        }
    });
    ForEach.accessor(gltf, function(accessor) {
        if (accessor.normalized === false) {
            delete accessor.normalized;
        }
    });
    return gltf;
}