Some issues with pbm3c2

[tabernig]

Problems with plane segmentation (py4dgeo.PBM3C2()):

• Plane segmentation loads forever (hours?) and crashes eventuallyon small datasets (.laz ~ 1mb)
• Plane segmentation crashes even earlier or does not finish on medium sized datasets (.laz ~100mb)
• Data and code used can be downloaded here: https://heibox.uni-heidelberg.de/d/ea45a78b16e245f1aeb5/

Since plane segmentation did not work, planar patches are extracted with CloudCompare.

• reconstruct_post_segmentation_output does not compute all attributes for both epochs. The segment file contains most of one epoch and only a small part of the other epoch. If the order of the input epochs is reversed, the same problem persists with the data missing beeing reversed. Example: epoch0 has173 planes, epoch1 has 442 planes, output has 442 segments mit 10 from epoch0 and432 from epoch1.