How to get the length value of the pipeline exactly?

I could refer to UgGeneralPointCreate.c and use ProPseriesObjectVisit to create a datum in the segment of the pipeline.
We are doing this to get a straight line in the pipeline.
Problems with the operation are as follows.

Returns the n distance value if the straight line of the pipe extends or is interrupted in the middle.

We have no way to distinguish straight lines.
We only get values that are broken up into segments.
I need to find a straight line of pipe.

Please let me know if you have a good idea.

Warm Regards,

SeonHo