[ROOT-11015] OpenGL rendering is incorrect for "pgon - pgon" - SFTJIRA

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Type: Bug
Status: Closed (View Workflow)
Priority: High
Resolution: Fixed
Affects Version/s: 6.22/02
Fix Version/s: 6.24/00, 6.22/04
Component/s: Geometry
Labels:
None
Environment:
- macOS 10.15.6
- Apple clang version 11.0.3 (clang-1103.0.32.62)

Development:

MERGED

Description

Please run the attached minimum script to reproduce the issue. When making a composite shape from two TGeoPgon, the OpenGL rendering is incorrect. I tried 6.22/02 (Screen Shot 2020-08-27 at 13.27.02) and 6.18/04 (Screen Shot 2020-08-27 at 13.27.48), and both rendering are different from what I expected.