Clustering no longer works when assigning a label to datasource entities

描述

dataSourcePromise.then(function (dataSource) {
  for (const source of dataSource.entities.values) {
    source.label = {
      text: ''
    }
  }
  ...
})

贡献者指南

技术栈

javascript

领域

frontend

议题类型

bug

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

1-3 hours

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

fresh

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

Familiarity with CesiumJSBasic JavaScriptKnowledge of clustering in Cesium

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

60

研究方向

The issue is reproducible via the provided Sandcastle example. The bug occurs when assigning a label with an empty string to a datasource entity. Likely a missing null/empty check in the clustering logic. Investigate files like `Source/DataSources/EntityCluster.js` and `Source/Scene/PointPrimitiveCluster.js` for how labels are handled during clustering. Check if there is an existing test for this scenario. The fix might involve ignoring labels with empty text during cluster calculation or ensuring they don't break the clustering process.