[LUCENE-8550] Tessellator fails when filtering coplanar points when creating linked list

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 7.6, 8.0
• Fix Version/s: 7.6, 8.0
• Component/s: modules/sandbox
• Lucene Fields: New
• Assignee: Ignacio Vera
• Reporter: Ignacio Vera
• Created: 30/Oct/18 15:51
• Updated: 14/Mar/19 13:07
• Resolved: 02/Nov/18 07:08

Description

Currently when creating the linked list on the tessellator, coplanar points are filtered. The problem is the following: 

if we have three coplanar points, the code is actually removing the last point, instead it should remove the middle one.