Formation of trails / ribbons that follow 3d shapes -- Three.js + WebARonARKit

WebXR_Shoe_RibbonGroup.js

function NurbsRibbonGroup() {
  this.ribbons = [];
  this.RIBBONCOUNT = 17;
  this.ribbonGroup = new THREE.Group();
  this.isInited = false;
  scene.add(this.ribbonGroup);
}

NurbsRibbonGroup.prototype.init = function(strokeTexture) {
  console.log("strokeTexture.length: " + strokeTexture.length );
    for (var i = 0; i < this.RIBBONCOUNT; i++) {

      this.ribbons.push(new NurbsRibbon(this));
      this.ribbons[i].init(strokeTexture[i%(strokeTexture.length)]);
      this.ribbonGroup.add(this.ribbons[i].lineGroup);
      this.isInited= true;
    }
};

NurbsRibbonGroup.prototype.TriggerDrawCurvesFromData = function() {
  for (var i = 0; i < this.RIBBONCOUNT; i++) {
    this.ribbons[i].drawLoadedCurve = !this.ribbons[i].drawLoadedCurve;
  }
};

NurbsRibbonGroup.prototype.update = function() {
  for (var i = 0; i < this.RIBBONCOUNT; i++) {
    this.ribbons[i].update();
  }
};

//NurbsRibbonGroup.prototype = Object.create(NurbsRibbon.prototype);