Magnitude with Cloud-to-Cloud Distance

[bmccracken]

Hello,
I was wondering if there is a tool or way to have the difference between two clouds in CC to show the gain, loss, and no change scale? Right now I am using the Cloud-to-Cloud Distance tool which is showing me the magnitude of change but not whether the change is added sediment or eroded sediment. I am basically trying to do a change detection between two point clouds and have them both aligned but now just stuck with this issue of data showing me just the magnitude of change(see below a screenshot of the data).

[daniel]

The C2C distance only gives you absolute distances. Therefore you can't make the difference between added and removed material indeed.

You have two options:
- mesh the 'reference' cloud (with 2.5D Delaunay if the cloud is not too noisy and 2.5D of course) and use the Cloud-to-mesh distances that are signed
- or directly use the advanced M3C2 plugin that is meant to provide this information and much more (https://www.cloudcompare.org/doc/wiki/i ... 2_(plugin))