Conversion of Cesium's 3D tiles' geolocation transform to Readable data!!

compute_transform.js

var cesium = require("cesium")

var tileset1 = {
    "asset": {
        "version": "1.0",
        "extras": {
            "ion": {
                "georeferenced": true,
                "movable": true,
                "terrainId": 1
            }
        }
    },
    "geometricError": 9266.661987012843,
    "root": {
        "children": [
            {
                "boundingVolume": {
                    "box": [
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                },
                "geometricError": 49.75228617113487,
                "content": {
                    "uri": "0/0.b3dm"
                },
                "children": [
                    {
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                        "geometricError": 49.75228617113487,
                        "content": {
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                        "children": [
                            {
                                "boundingVolume": {
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                                },
                                "geometricError": 0,
                                "content": {
                                    "uri": "2/000.b3dm"
                                }
                            },
                            {
                                "boundingVolume": {
                                    "box": [
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                                "geometricError": 0,
                                "content": {
                                    "uri": "2/001.b3dm"
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                            }
                        ]
                    },
                    {
                        "boundingVolume": {
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                        },
                        "geometricError": 0,
                        "content": {
                            "uri": "1/01.b3dm"
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                    }
                ],
                "transform": [
                    1,
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            }
        ],
        "refine": "REPLACE",
        "boundingVolume": {
            "box": [
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        },
        "geometricError": 9266.661987012843,
        "transform": [
            -0.008993544815786991,
            -0.00032500738052799034,
            0.004360105715351338,
            0,
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            -0.004782249422879397,
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            0,
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            0,
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    }
}

computeTransforms(tileset1);

function computeTransforms(tileset) {
    var t = tileset.root;
    var transformToRoot = cesium.defined(t.transform) ? cesium.Matrix4.fromArray(t.transform) : cesium.Matrix4.IDENTITY;
    var abc = new cesium.Cartesian3();
    cesium.Matrix4.getTranslation(transformToRoot, abc)
    
    var cartographic = cesium.Cartographic.fromCartesian(abc);
console.log(
    'lon ' + cesium.Math.toDegrees(cartographic.longitude) + ', ' +
    'lat ' + cesium.Math.toDegrees(cartographic.latitude) + ', ' +
    'alt ' + cartographic.height);
    
    
    var resp = cesium.Transforms.fixedFrameToHeadingPitchRoll(transformToRoot, cesium.Ellipsoid.WGS84, cesium.Transforms.eastNorthUpToFixedFrame);
    console.log("HEADING PITCH ROLL below : ")
    console.log(cesium.Math.toDegrees(resp.heading));
    console.log(cesium.Math.toDegrees(resp.pitch));
    console.log(cesium.Math.toDegrees(resp.roll));
}