Circles and Ellipses【译】

原文链接及内容

原文链接：https://sandcastle.cesium.com/?src=Circles%20and%20Ellipses.html&label=All

效果如下图：

示例代码如下：

const viewer = new Cesium.Viewer("cesiumContainer");

const greenCircle = viewer.entities.add({
  position: Cesium.Cartesian3.fromDegrees(-111.0, 40.0, 150000.0),
  name: "Green circle at height with outline",
  ellipse: {
    semiMinorAxis: 300000.0,
    semiMajorAxis: 300000.0,
    height: 200000.0,
    material: Cesium.Color.GREEN,
    outline: true, // 高度必须要设置用以显示椭圆轮廓
  },
});

const redEllipse = viewer.entities.add({
  position: Cesium.Cartesian3.fromDegrees(-103.0, 40.0),
  name: "在地表的红色椭圆",
  ellipse: {
    semiMinorAxis: 250000.0,
    semiMajorAxis: 400000.0,
    material: Cesium.Color.RED.withAlpha(0.5),
  },
});

const blueEllipse = viewer.entities.add({
  position: Cesium.Cartesian3.fromDegrees(-95.0, 40.0, 100000.0),
  name: "被旋转和拉伸的蓝色半透明并带有轮廓的椭圆",
  ellipse: {
    semiMinorAxis: 150000.0,
    semiMajorAxis: 300000.0,
    extrudedHeight: 200000.0,
    rotation: Cesium.Math.toRadians(45),
    material: Cesium.Color.BLUE.withAlpha(0.5),
    outline: true,
  },
});

viewer.zoomTo(viewer.entities);