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,
  },
});