Create DashLine with Three and Cesium

Hey, everybody. I am creating a project on Cesium + Three, and I have a question of creating a DashLine. The problem is that I’m trying to do the following example: three.js examples.

I have lines are not displayed or behave unpredictably, for example, just in the scene as a grid and constantly moving. And I need just a small vertical dotted line. Here’s how I get the coordinates for it:

 let positionUp = Cartesian3.fromDegrees(37.0, 125.0, 10000.0);
 let positionBottom = Cartesian3.fromDegrees(37.0, 125.0, 0);

                    let positions = [positionBottom, positionUp].map(cartesian => {
                      let cartographic = Cartographic.fromCartesian(cartesian);
                      return new Vector3(
                  const positionsArray = [];
        positions.forEach(pos => {
            positionsArray.push(pos.x, pos.y, pos.z);
                    // Create the geometry and material for the dashed line
                    const geometry = new LineGeometry()
				            geometry.setPositions( positionsArray );
                    const matLineDashed = new LineMaterial( {

                      color: 0xffffff,
                      linewidth: 5, // in world units with size attenuation, pixels otherwise
                      vertexColors: true,
                      dashed: true,
                      dashSize: 10,
            gapSize: 5,
                      alphaToCoverage: true,
                    } );
                    // Create the line
                    const line = new Line2(geometry, matLineDashed);
                    line.scale.set( 1, 1, 1 );

Why doesn’t it work?