[GitHub] [lucene] nknize commented on issue #11767: Does the method #cureLocalIntersections in the Tessellator make any sense?

[GitBox <gi...@apache.org>]

nknize commented on issue #11767:
URL: https://github.com/apache/lucene/issues/11767#issuecomment-1248382179

   > My proposal is to remove the method completely or at least not call this method if the Tessellator has been called with the flag `checkSelfIntersections` set to true.
   > 
   > @nknize introduced this method on the first version of the Tessellator, he might have more background about the need of this method. what do you think?
   
   I was actually looking into this before turning my attention to the shape doc values and I was just getting ready to come back to it. The method was originally introduced to postpone self intersection removal unless absolutely necessary (e.g., tessellation failed). Essentially it was a lazy cleaning approach. I believe, though this needs thorough evaluation, some of the improvements made to [filter points](https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/geo/Tessellator.java#L1326) rendered much of this logic obsolete. My last test (random and explicit) never actually exercised this logic, even with self intersections. Furthermore, the follow up SPLIT logic was not exercised either so I was exploring the possibility of removing both of these phases.  
   
   > if you could go to https://github.com/apache/lucene/issues/11777 and test with those polygons as well. We are having Elastic Cloud timeouts because of the time it takes to triangulate.
   
   These adversarial cases are important to capture in our tests. Our randomized polygon generator doesn't inject any self intersections so we really have a gap in testing the logic coverage. 


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