How to use the cesium.Transforms.eastNorthUpToFixedFrame function in cesium

viewModel.orbitTickFunction = undefined

  viewModel.isOrbiting = true
  viewModel.orbitLastTimestamp = getTimestamp()

  var camera = scene.camera

  if (defined(viewModel.terria.trackedEntity)) {
    // when tracking an entity simply use that reference frame
    viewModel.orbitFrame = undefined
    viewModel.orbitIsLook = false
  } else {
    var center = Utils.getCameraFocus(viewModel.terria, true, centerScratch)

    if (!defined(center)) {
      viewModel.orbitFrame = Transforms.eastNorthUpToFixedFrame(camera.positionWC, scene.globe.ellipsoid, newTransformScratch)
      viewModel.orbitIsLook = true
    } else {
      viewModel.orbitFrame = Transforms.eastNorthUpToFixedFrame(center, scene.globe.ellipsoid, newTransformScratch)
      viewModel.orbitIsLook = false
    }
  }

  viewModel.orbitTickFunction = function (e) {
    var timestamp = getTimestamp()
    var deltaT = timestamp - viewModel.orbitLastTimestamp
    var rate = (viewModel.orbitCursorOpacity - 0.5) * 2.5 / 1000
    var distance = deltaT * rate

    var angle = viewModel.orbitCursorAngle + CesiumMath.PI_OVER_TWO
    var x = Math.cos(angle) * distance
    var y = Math.sin(angle) * distance

viewModel.isRotating = true
  viewModel.rotateInitialCursorAngle = Math.atan2(-cursorVector.y, cursorVector.x)

  if (defined(viewModel.terria.trackedEntity)) {
    // when tracking an entity simply use that reference frame
    viewModel.rotateFrame = undefined
    viewModel.rotateIsLook = false
  } else {
    var viewCenter = Utils.getCameraFocus(viewModel.terria, true, centerScratch)

    if (!defined(viewCenter) || (scene.mode === SceneMode.COLUMBUS_VIEW && !sscc.enableLook && !sscc.enableTranslate)) {
      viewModel.rotateFrame = Transforms.eastNorthUpToFixedFrame(camera.positionWC, scene.globe.ellipsoid, newTransformScratch)
      viewModel.rotateIsLook = true
    } else {
      viewModel.rotateFrame = Transforms.eastNorthUpToFixedFrame(viewCenter, scene.globe.ellipsoid, newTransformScratch)
      viewModel.rotateIsLook = false
    }
  }

  var oldTransform
  if (defined(viewModel.rotateFrame)) {
    oldTransform = Matrix4.clone(camera.transform, oldTransformScratch)
    camera.lookAtTransform(viewModel.rotateFrame)
  }

  viewModel.rotateInitialCameraAngle = -camera.heading

  if (defined(viewModel.rotateFrame)) {
    camera.lookAtTransform(oldTransform)
  }

viewModel.rotateMouseMoveFunction = undefined
  viewModel.rotateMouseUpFunction = undefined

  viewModel.isRotating = true
  viewModel.rotateInitialCursorAngle = Math.atan2(-cursorVector.y, cursorVector.x)

  if (defined(viewModel.terria.trackedEntity)) {
    // when tracking an entity simply use that reference frame
    viewModel.rotateFrame = undefined
    viewModel.rotateIsLook = false
  } else {
    var viewCenter = Utils.getCameraFocus(viewModel.terria, true, centerScratch)

    if (!defined(viewCenter) || (scene.mode === SceneMode.COLUMBUS_VIEW && !sscc.enableLook && !sscc.enableTranslate)) {
      viewModel.rotateFrame = Transforms.eastNorthUpToFixedFrame(camera.positionWC, scene.globe.ellipsoid, newTransformScratch)
      viewModel.rotateIsLook = true
    } else {
      viewModel.rotateFrame = Transforms.eastNorthUpToFixedFrame(viewCenter, scene.globe.ellipsoid, newTransformScratch)
      viewModel.rotateIsLook = false
    }
  }

  var oldTransform
  if (defined(viewModel.rotateFrame)) {
    oldTransform = Matrix4.clone(camera.transform, oldTransformScratch)
    camera.lookAtTransform(viewModel.rotateFrame)
  }

  viewModel.rotateInitialCameraAngle = -camera.heading

  if (defined(viewModel.rotateFrame)) {

viewModel.orbitLastTimestamp = getTimestamp()

  var camera = scene.camera

  if (defined(viewModel.terria.trackedEntity)) {
    // when tracking an entity simply use that reference frame
    viewModel.orbitFrame = undefined
    viewModel.orbitIsLook = false
  } else {
    var center = Utils.getCameraFocus(viewModel.terria, true, centerScratch)

    if (!defined(center)) {
      viewModel.orbitFrame = Transforms.eastNorthUpToFixedFrame(camera.positionWC, scene.globe.ellipsoid, newTransformScratch)
      viewModel.orbitIsLook = true
    } else {
      viewModel.orbitFrame = Transforms.eastNorthUpToFixedFrame(center, scene.globe.ellipsoid, newTransformScratch)
      viewModel.orbitIsLook = false
    }
  }

  viewModel.orbitTickFunction = function (e) {
    var timestamp = getTimestamp()
    var deltaT = timestamp - viewModel.orbitLastTimestamp
    var rate = (viewModel.orbitCursorOpacity - 0.5) * 2.5 / 1000
    var distance = deltaT * rate

    var angle = viewModel.orbitCursorAngle + CesiumMath.PI_OVER_TWO
    var x = Math.cos(angle) * distance
    var y = Math.sin(angle) * distance

    var oldTransform

.add("Basic", () => (
    
      

.add("Events", () => (
    
      

.add("Events", () => (