I want to create vector layer like polyline , Polygons etc. how can i do this in 3d map of cesiumjs

CesiumJS
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1. A concise explanation of the problem you're experiencing.
i want to know there is any liberary of cesiumjs through which i can create a polyline , polygon and create a GEOJSON data?

2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

4. The Cesium version you're using, your operating system and browser.

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If you have a GeoJSON file, you can load directly in Cesium, here’s a code example:

You can also create all these objects programmatically, here’s an example for polylines:

You can find other geometry types in the code examples or the documentation: https://cesiumjs.org/Cesium/Build/Documentation/