RANSAC shape areas

[geolux]

Hi guys
I'm testing CC "from Points cloud to BIM procedure"
So I need to detect the shapes from wall or roofs. In this sample CC detected so good the plane of the roof but it is a rectangle and not follow the contours of the original shape of the roof. Is it directly possible to get a irregular shape and not a rectangle shape? Or, how can I cut the calculated shape along the contours of the roof?
Thank you

[daniel]

If you want the contour you should try to fit a 'Facet' instead of a plane (the 'max edge length parameter - if not null - will enable the extraction of the concave hull). You'll have to play with this parameter to get a good result, but if it's too big the contour will not follow the shape close enough, and if it's too small the contour will follow the cloud noise / irregular sampling and you'll get a "noisy" contour).