Cesium JS API
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PolylineVisualizer

概述

PolylineVisualizer是cesium.js中用于渲染折线的可视化器。通过PolylineVisualizer可以实现对于数据中折线的可视化。

实例化

创建PolylineVisualizer需要将Cesium.Viewer对象作为参数,代码如下:

var viewer = new Cesium.Viewer('cesiumContainer');
var polylineVisualizer = new Cesium.PolylineVisualizer(viewer.scene);

属性

PolylineVisualizer实例具有以下常用属性:

属性名 类型 描述
allowPicking Boolean 是否允许点击拾取,默认为true
show Boolean 是否显示可视化结果,默认为true
id String 可视化结果的唯一标识符,默认为undefined

方法

PolylineVisualizer实例具有以下常用方法:

destroy()

销毁PolylineVisualizer对象。

polylineVisualizer.destroy();

isDestroyed()

检查PolylineVisualizer对象是否已经被销毁。

var isDestroyed = polylineVisualizer.isDestroyed();

update(frameState)

更新PolylineVisualizer实例的状态。

var frameState = viewer.scene.frameState;
polylineVisualizer.update(frameState);

事件

PolylineVisualizer实例具有以下常用事件:

showEvent

当show属性发生变化时触发该事件。

polylineVisualizer.showEvent.addEventListener(function(isVisible) {
    console.log('showEvent', isVisible);
});

destroyEvent

当PolylineVisualizer实例被销毁时触发该事件。

polylineVisualizer.destroyEvent.addEventListener(function() {
    console.log('destroyEvent');
});

updateEvent

当PolylineVisualizer实例更新时触发该事件。

polylineVisualizer.updateEvent.addEventListener(function(frameState) {
    console.log('updateEvent', frameState);
});