cesium entity类

 //1、box盒子，dimensions为尺寸（长宽高），outline为边界（默认false不显示）

    var redBox = myviewer.entities.add({

            show:false,

            id:"0204",

            name:"盒子",

            description:"一个长条盒子......................",

            position:Cesium.Cartesian3.fromDegrees(113,31,10000),

            

            box:{

            dimensions: new Cesium.Cartesian3(400,300,100000),

            material:Cesium.Color.RED,

            outline:true,

            outlineColor:Cesium.Color.BLUE,

             //shadows          //阴影还没有尝试成功

            }

        });

 //2、旋转的圆形或者椭圆

    var xza = new Cesium.EllipseGraphics({

        semiMinorAxis:100000,

        semiMajorAxis:300000,

        height:100000,

        extrudedHeight:10000,//拉升，拔高，单位米

        rotation:Cesium.Math.toRadians(30),//一种数字属性，指定从北逆时针方向椭圆的旋转。

        material:Cesium.Color.BLUE.withAlpha(0.5),

        outline:true        

      })

    var greencircle = myviewer.entities.add({

        show:false,

        name:"一个圆",

        position:Cesium.Cartesian3.fromDegrees(113,31,10000),

        ellipse:xza

      })

//3、走廊形状    

    var redCorr =myviewer.entities.add({

         name:"走廊形状",

         corridor:{

                positions:Cesium.Cartesian3.fromDegreesArray([113,31,114,36,115,33]),

                1000,         

                extrudedHeight:1000,//实体的拉升高度

                height:0,//实体的海拔高度

                material:Cesium.Color.RED.withAlpha(0.5),

                outline:true,

                outlineColor:Cesium.Color.BLACK

                //granularity:Cesium.Math.RADIANS_PER_DEGREE(30)

            }

       });

//4、polygon 

    var myPolygon1 = new Cesium.PolygonGraphics({

        extrudedHeight:10000,

        //height:1000,

        closeTop:false,

        closeButton:false,

        //fromDegreesArrayHeights(113,31,高程)，则直接显示高程，按照西-北-东-南的逆时针方向，否则形状会出乎想象

        hierarchy : Cesium.Cartesian3.fromDegreesArray([114, 31.0,

                                                        114,33,

                                                        113.0, 33.0,

                                                        113.0, 31.0]),

        material : Cesium.Color.RED

    });

    var polygonshow = myviewer.entities.add({

        name:"polygon01",

        polygon:myPolygon1

    })；

    //5、polyline

    var mypolyline = new Cesium.PolylineGraphics({

      positions:Cesium.Cartesian3.fromDegreesArray([123,31,103,31]),

      10,

      material:Cesium.Color.BLACK,

      clampToGround:true,

      material: new Cesium.PolylineArrowMaterialProperty(Cesium.Color.PURPLE), //体会编码，下面的覆盖上面,material对应了一个实例

      arcType:Cesium.ArcType.GEODESIC //这种是测地线，另一种 arcType:Cesium.ArcType.RHUMB是航海线

    })

    var polylineshow = myviewer.entities.add({

      name:"mypolyine",

      polyline :mypolyline

    });

      myviewer.flyTo(polylineshow);

6、entity实现的一些辅助功能

6.1加载或生成entity的朝向:orientation 

例如：
    var position = Cesium.Cartesian3.fromDegrees(118.6265572,32.0642026, 0.0);
    //x,y,z轴的倾斜角度
    var hpr = new Cesium.HeadingPitchRoll(Cesium.Math.toRadians(135), 0.0, 0.0);
    //确定目标x,y,z轴方向
    var orientation = Cesium.Transforms.headingPitchRollQuaternion(position, hpr);

6.2entity的属性

        properties: {
            Latitude: 32.0642026,
            Longitude: 118.6265572,
            "车主": "张三",
            "车牌号": "鄂A 0000"
        },