From pointcloud via RANSAC and footprint to house model

[PelkaJakub]

Hi,
Maybe it is possible, maybe it is not. I am wondering how to create a simple LOD2 roof structure with the use of RANSAC algorithm.

I have a pointcloud.
I run RANSAC with refined settings
I get multiple planes corresponding with house roof (and walls sometimes).

How to cut & select only planes that overlay pointcloud ?
How to intersect planes with each other and filter only ones that are overlying pointcloud ?
Is there any way to export all the planes att once to another software (in a format as OBJ, FBX, DAE)?

Any tips for workflow to recreate a simple LOD2 house model from pointcloud with usage of free tools will be appreciated.

[daniel]

Sadly, the 2 first actions are not possible (you can't 'cut' planes, and there's no tool to intersect lines, etc.)

And for the latest one, I guess you can select all your planes, then 'merge' them (Edit > Merge) and you should be able to export the result as an OBJ file.