PathSeg bad Transformation

[bnmfw]

Describe the bug

During #6326 development an issue arises with the PathSegs. On jpeg_sky130hs a PathSeg on the _031547_ net. It is created by a NearbyGrid access point on an instance that is mirrored on the X axis. Although in some parts of the code the expected placement of the PathSeg is correct its location on the GUI is wrong, also an connectivity error is raised in this net due to this misplacement.

To help debugging, a separate getBadTransform function was created, that allows for the usage of the old getTransform. This is only used on PathSegs transformation, and passes the aforementioned regression test when used. This is bad, however, as the test should pass using getTransform instead of getBadTransform.

I tracked the problem down to pin2epMap_helper where regionQuery->query(query_box, lNum, result) shows a divergence when using both the getTransform and getBadTransform methods. It seems like the RTree is being created differently on both cases, and I'm not sure why. This is where I'm at.

The code mentioned can be found at a separate branch.

Expected Behavior

The jpeg_sky130hs regression test should pass using getTransform in the place of getBadTransform.

Environment

[WARNING] Your current OpenROAD version is outdated.
It is recommened to pull the latest changes.
If problem persists, file a github issue with the re-producible test case.
kernel: Linux 6.5.0-1025-gcp
os: Ubuntu 22.04.4 LTS (Jammy Jellyfish)
cmake version 3.24.2
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-- OpenROAD version: v2.0-18040-g82feac91b
-- System name: Linux
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-- Compiler: GNU 11.4.0
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To Reproduce

Run jpeg_sky130hs on this branch.

Relevant log output

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Screenshots

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Additional Context

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