Cesium JS API
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EllipseGeometryUpdater

EllipseGeometryUpdater是Cesium中用于更新椭圆几何图形的对象。

概述

EllipseGeometryUpdater使用椭圆几何图形作为参数,在场景中创建和更新几何体对象。它从Entity中检索椭圆参数,以更新位置、高度、方向、半长轴和半短轴。此外,还可以设置几何体的外观。

使用

var entity = new Cesium.Entity({
    position: Cesium.Cartesian3.fromDegrees(0, 0, 0),
    ellipse: {
        semiMajorAxis: 300000.0,
        semiMinorAxis: 200000.0,
        height: 0.0,
        material: Cesium.Color.RED.withAlpha(0.5),
        outline: true,
        outlineColor: Cesium.Color.BLACK
    }
});

var updater = new Cesium.EllipseGeometryUpdater(entity, scene);

方法

update(time)

更新椭圆几何体对象。参数time是一个可选参数,用于指定更新后的时间。

属性

  • entity:将要更新几何图形的实体对象。
  • scene:场景对象。
  • isUpdating:当前是否正在更新几何体对象。

事件

  • onTerrainHeightUpdated:可选事件,用于在地形高度被更新时调用。

示例

var entity = new Cesium.Entity({
    position: Cesium.Cartesian3.fromDegrees(0, 0, 0),
    ellipse: {
        semiMajorAxis: 300000.0,
        semiMinorAxis: 200000.0,
        height: 0.0,
        material: Cesium.Color.RED.withAlpha(0.5),
        outline: true,
        outlineColor: Cesium.Color.BLACK
    }
});

var updater = new Cesium.EllipseGeometryUpdater(entity, scene);

updater.update();

参考

  • [Cesium官方文档] (https://cesium.com/docs/cesiumjs-ref-doc/EllipseGeometryUpdater.html)