Cesium entity画各种图（十六）

      var square = this.viewer.entities.add({         id:8,         position:new Cesium.Cartesian3.fromDegrees(103.8621, 30.7065,495),         polygon:{             show: true,//是否可见             hierarchy: Cesium.Cartesian3.fromDegreesArray([                 110.0,                 30.0,                 120.0,                 30.0,                 115.0,                 40.0,             ]),//多边形的点坐标             height: 50000,//相对于椭球的高度，多边形的高程，单位米             //即便hierarchy设置了高程，只要perPositionHeight: false(默认)，多边形都会以height作为高程值，默认值为0             // perPositionHeight: false,//是否使用hierarchy中的高度             extrudedHeight: 0,//挤出高度,多边形的外扩高程，默认值为0，当值不为0时，可形成多边形棱柱，即polygon可用来绘制几何体             //这里不知道为什么extrudedHeight为0的时候还是有高度,只有将其注释掉才没高度             material: Cesium.Color.CYAN,             outline: true,//是否显示轮廓线             outlineColor: Cesium.Color.RED,//轮廓线颜色             outlineWidth: 5.0,//轮廓宽度             closeTop: false,//如果为false，则挤出多边形的顶部将保持打开状态             closeBottom: true,//如果为false，则挤出多边形的底部将保持打开状态             distanceDisplayCondition: new Cesium.DistanceDisplayCondition(100.0)//基于到摄影机的距离确定可见性,在100-2000000米的距离范围内可见         },       })

const redTube = viewer.entities.add({   name: "Red tube with rounded corners",   polylineVolume: {//管道线坐标     positions: Cesium.Cartesian3.fromDegreesArray([       -85.0,       32.0,       -85.0,       36.0,       -89.0,       36.0,     ]),     shape: [//决定如何挤出，也就是管道的形状       //因为是Cartesian2，所以只能往上下两个方向挤出，也就决定了不能生成竖直的管道，否则是没厚度的       new Cesium.Cartesian2(-50000, -50000),       new Cesium.Cartesian2(50000, -50000),       new Cesium.Cartesian2(50000, 50000),       new Cesium.Cartesian2(-50000, 50000),     ],     material: Cesium.Color.RED.withAlpha(0.5),//材料颜色     cornerType: Cesium.CornerType.BEVELED,//转角形状，默认是圆转角     fill:true,//是否中心有材料，也就是是否不是中空     outline: true,     outlineColor: Cesium.Color.BLACK,   }, });

function computeCircle(radius) {   const positions = [];   for (let i = 0; i < 360; i++) {     const radians = Cesium.Math.toRadians(i);     positions.push(       new Cesium.Cartesian3(         radius * Math.cos(radians),         0,         radius * Math.sin(radians),       )     );   }   return positions; }  const line = viewer.entities.add({   name: "Red tube with rounded corners",   polyline: {     positions: computeCircle(10000000),     wodth:5,     material:new Cesium.PolylineDashMaterialProperty({//虚线       color: Cesium.Color.YELLOW,       dashLength: 20, //短划线长度pixel       gapColor:Cesium.Color.TRANSPARENT,//空隙颜色        }),   } }); viewer.zoomTo(viewer.entities);

const blueBox = viewer.entities.add({   name: "Blue box",   position: Cesium.Cartesian3.fromDegrees(-114.0, 40.0, 300000.0),//中心点位置   box: {     dimensions: new Cesium.Cartesian3(400000.0, 300000.0, 600000.0),//指定长宽高     material: Cesium.Color.BLUE,     outline: true,//是否显示轮廓线     fill: true,//是否填充   }, });

const redCorridor = viewer.entities.add({   name: "Red corridor on surface with rounded corners",   corridor: {     //fromDegreesArrayHeights的高度无效，只能用height属性     positions: Cesium.Cartesian3.fromDegreesArray([       -100.0,       40.0,       -105.0,       40.0,       -105.0,       35.0,     ]),     height:100000,//高度     width: 200000.0,//宽度     extrudedHeight:10000,//挤出高度,也就是通道的高度     cornerType: Cesium.CornerType.ROUNDED,//转角样式     material: Cesium.Color.RED.withAlpha(0.5),     heightReference:Cesium.HeightReference.NONE//贴地或是其他   }, });

const redCorridor = viewer.entities.add({   name: "Red corridor on surface with rounded corners",   position: new Cesium.Cartesian3.fromDegrees(119.999, 30, 200),   cylinder: {     topRadius:80000,//顶部半径     bottomRadius:80000,//底部半径     length:100000,//高度     slices:10,//圆柱体周长周围的边数     numberOfVerticalLines:5,//指定沿轮廓周长绘制的垂直线的数量     material: Cesium.Color.RED.withAlpha(0.5),     heightReference:Cesium.HeightReference.RELATIVE_TO_GROUND,//贴地或是其他     outline:true,//是否显示轮廓     outlineColor:Cesium.Color.BLUE,     outlineWidth:100,   }, });