How to change the color of sphere objects dynamically (used SceneBuilder in Autodesk forge) - autodesk-forge

Question

I am working on the example from Custom models in Forge Viewer blog by Petr Broz. I am facing issue in updating the color of sphere objects dynamically. I am getting the value of sphere's color from a json file like this "color": "#FF0000". I have created 3 spheres and I am getting the color of first sphere for the rest also. Why the color is not updating for the other spheres? If the problem is on using same material then I tried giving the sphereMaterial in array also as shown below. Is that wrong or how can i update the color?
var spherecolor='';
var sphereMaterial = [];
const button = document.getElementById('button-geometry');
button.addEventListener('click', async function () {
const sceneBuilder = await viewer.loadExtension('Autodesk.Viewing.SceneBuilder');
const modelBuilder = await sceneBuilder.addNewModel({ conserveMemory: true, modelNameOverride: 'My Custom Model' });
for (var i = 0; i < numOfSphere;i++) {
addGeometry(modelBuilder, jsonGeomConfig.geom[i].dbId, i);
}
});
function addGeometry(modelBuilder, dbId, i) {
const sphereGeometry = new THREE.BufferGeometry().fromGeometry(new THREE.SphereGeometry(0.05, 8, 10));
//Getting spherecolor from json file
spherecolor = jsonGeomConfig.geom[i].color;
sphereMaterial[i] = new THREE.MeshPhongMaterial({ color: spherecolor });
const sphereTransform = new THREE.Matrix4().compose(
new THREE.Vector3(jsonGeomConfig.geom[i].Position.posX, jsonGeomConfig.geom[i].Position.posY, jsonGeomConfig.geom[i].Position.posZ),
new THREE.Quaternion(0, 0, 0, 1),
new THREE.Vector3(2,2,2)
);
modelBuilder.addMaterial('MyCustomMaterial', sphereMaterial[i]);
const sphereGeomId = modelBuilder.addGeometry(sphereGeometry);
const sphereFragId = modelBuilder.addFragment(sphereGeomId, 'MyCustomMaterial', sphereTransform);
modelBuilder.changeFragmentsDbId(sphereFragId, dbId);
}

Answer 1

Be sure to give the materials with different colors different names ... otherwise it'd get overridden - see this live environment:
modelBuilder.addMaterial('MyCustomMaterial'+i, sphereMaterial[i]);
const sphereGeomId = modelBuilder.addGeometry(sphereGeometry);
const sphereFragId = modelBuilder.addFragment(sphereGeomId, 'MyCustomMaterial'+i, sphereTransform);