I have a list of polygons. Is it possible to detect whether a line intersects with one of the polygons?

I checked the IntersectionTests function I don’t think it will help in my case

IntersectionTests - Cesium Documentation.

Any suggestion or code example is appreciated.

Whether or not a line intersects a polygon depends (in this case) on the *triangulation* of the polygon.

Take a look at this example:

The green and the blue polygon consist of the same vertices, but are displayed at different places, and they are *triangulated* differently, because the vertices are given in a different order. The red line intersects the green polygon. But it does not intersect the blue polygon.

Therefore, the only real “intersection test” that one can do is to intersect a line or line segment with a single *triangle*. This is offered in `IntersectionTests.lineSegmentTriangle`

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(As far as I know, there is no “public” way of obtaining the triangles that are actually *rendered* when rendering a polygon, though - related: Getting polygons' rendered triangles' - #2 by sam.rothstein )

A sandcastle that shows what’s also shown in the screenshot: