CloudCompare forum

Hi everyone!

Is there any way to cut a point cloud using a plane? I want to cut a PC using a plane and segment out a part of the pointcloud. I am sending a PrintScreen of the problem in the attachment.

Also, what is the best way to create a watertight mesh. Everytime I try to do that I have some holes and I can not calculate the volume

About hole closing ,you can use external sofware like Blender, Meshlab or freeCAD to close holes.
But when you import back to cc you may get some non-manifolds or worng vertics order(inverted normals ) and get wrong volume.

To segment the cloud, you just have to compute the (signed) distances between the cloud and the plane (with 'Tools > Distances > Cloud/Mesh Dist.' or 'Tools > Distances > Cloud/Primitive Dist.' if you have a recent version of CC.).

Then you can filter split the points based on their distance with 'Edit > Scalar fields > Filter by Value'.