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Volume calculation between two point cloud surfaces

Posted: Wed Aug 25, 2021 8:47 am
by Izzak
Hi,

I have 3d scans of the same surface twice, one before cut and the other after. I want to calculate the volume removed by the cut from the surface. I have attached the top view with some x-section to understand visually.
top view with 3 sections
top view with 3 sections
Xsectio.jpg (183.18 KiB) Viewed 2313 times


how can I calculate the volume?

Re: Volume calculation between two point cloud surfaces

Posted: Thu Aug 26, 2021 6:01 pm
by daniel
The only option in CC is to use the '2.5D Volume calculation tool' (see https://www.cloudcompare.org/doc/wiki/i ... .5D_Volume).

So first you'll have to convert your meshes to dense point clouds (with 'Edit > Mesh > Sample points'). Don't hesitate to generate a lot of points so as to be able to use a find 'step' in the 2.5D Volume calculation tool and get a fine volume estimation.

Re: Volume calculation between two point cloud surfaces

Posted: Fri Aug 27, 2021 11:38 pm
by Izzak
Thank you.

Re: Volume calculation between two point cloud surfaces

Posted: Fri Sep 03, 2021 9:48 pm
by DA523
Because your (Z projection) scan area is rectangular, it does not require any cleaning of mesh to avoid the convex area.
just
convert your meshes to dense point clouds (with 'Edit > Mesh > Sample points').
Remember in volume 2.5D Volume calculation tool to start from small grid up to bigger grid until you get stable volume