[postgis-users] Is there any way to find and select parallel lines in 3D?

[Marcin Mionskowski]

It's easy for segments. Just use general math approach (for example first
hit with duckduckgo search for line equation 3d -
https://www.geeksforgeeks.org/equation-of-a-line-in-3d/).
This is not so simple for linestrings composed from multiple segments. For
exapmle, are the following lines parallel?
select ST_GeomFromText('LINESTRING(0 0 0,0 0 4)') geomA
,ST_GeomFromText('LINESTRING(0 -1 0,1 0 1,0 1 2,-1 0 3,0 -1 4)') geomB

czw., 24 lut 2022 o 10:53 Shaozhong SHI <shishaozhong at gmail.com> napisał(a):

> The following is interesting.
>
> How to select parallel lines in postgis - Geographic Information Systems
> Stack Exchange
> <https://gis.stackexchange.com/questions/224937/how-to-select-parallel-lines-in-postgis>
>
> However, it appears to be full 2D lines.
>
> Are there any solutions to find and select parallel lines in 3D?
>
> Regards,
>
> David
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