How to use

getTransformedVertices

method

in

com.badlogic.gdx.math.Polyline

shapeRenderer.begin(ShapeRenderer.ShapeType.Line);
Polyline polyline = ((PolylineMapObject)mapObject).getPolyline();
shapeRenderer.polyline(polyline.getTransformedVertices());
shapeRenderer.end();

  private Shape getPolyline(PolylineMapObject polylineObject) {
    float[] vertices = polylineObject.getPolyline().getTransformedVertices();
    Vector2[] worldVertices = new Vector2[vertices.length / 2];

    for (int i = 0; i < vertices.length / 2; ++i) {
      worldVertices[i] = new Vector2();
      worldVertices[i].x = vertices[i * 2] / units;
      worldVertices[i].y = vertices[i * 2 + 1] / units;
    }

    ChainShape chain = new ChainShape(); 
    chain.createChain(worldVertices);
    return chain;
  }
}