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: ''
    }
  }
  ...
})

貢獻者指南

技術棧

javascript

領域

frontend

議題類型

bug

難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。

3

預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。

1-3 hours

活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。

fresh

清晰度議題是否清楚說明預期改動、驗收標準和下一步。

clear

前置要求

Familiarity with CesiumJSBasic JavaScriptKnowledge of clustering in Cesium

新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。

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.