Cesium primitive绘制折线和多边形

drawContour() {

    console.log("正在执行");

    let rectangleInstanceArr = [];

    //定义折线几何

    let polyline = new Cesium.PolylineGeometry({

      positions: Cesium.Cartesian3.fromDegreesArray([

        119.7,

        30.2,

        119.8,

        30.2,

        119.85,

        30.3

      ]),

      width: 10.0,

      vertexFormat:Cesium.PolylineColorAppearance.VERTEX_FORMAT

    });

    //定义多边形几何

    // let polygon = new Cesium.PolygonGeometry({

    //   polygonHierarchy: new Cesium.PolygonHierarchy(

    //     Cesium.Cartesian3.fromDegreesArray([

    //       119.7,

    //       30.2,

    //       119.8,

    //       30.2,

    //       119.85,

    //       30.3,

    //     ])

    //   ),

    //   vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,

    // });

    var rectangleInstance = new Cesium.GeometryInstance({

      geometry: polyline,

      attributes: {

        color: Cesium.ColorGeometryInstanceAttribute.fromColor(

          Cesium.Color.RED

        ),

      },

    });

    rectangleInstanceArr.push(rectangleInstance);

    this.viewer.scene.primitives.add(

      new Cesium.Primitive({

        geometryInstances: rectangleInstanceArr,

        //多边形外观

        // appearance: new Cesium.PerInstanceColorAppearance({

        //   translucent: true,

        //   closed: false,

        // }),

        //折线外观

        appearance:new Cesium.PolylineColorAppearance({

            translucent:false

        }),

        asynchronous: false,

      })

    );

  }