How to calculate 3D objects’ volume?

[JamesGregory]

Hello to all! Would someone tell me how i can calculate the volume of 3D objects plz? Thanks a lot.

[daniel]

really 3D or 2.5D?

Anyway, there are basically two options that may work for you:
- https://www.cloudcompare.org/doc/wiki/i ... ure_volume
- https://www.cloudcompare.org/doc/wiki/i ... .5D_Volume

[DA523]

Sorry I deleted this post by mistake ...while posting a new one
how to recover it

[DA523]

Lets speak about 2.5D volume (Tools >> VOLUME >>Compute 2.5D volume)

https://www.cloudcompare.org/doc/wiki/i ... .5D_Volume

it is the most professional method to find volume between 2 points clouds and works fine on 2 points clouds or single cloud and plane (constant x,y, or z)
it is the same as finding the area under function curve by numerical integration

Care should be taken because , it can give bad volume in some situations because of :
- Convex hull area if interpolation is used
- Empty cells, if the less dense points cloud is used with leave it empty choice
- Big grid size (too many points fail in each cell)
- One points cloud has more than one layer in the same projection direction
For example, 2.5D volume can not work on this attached mesh

Attached 1 bin file

2.5D volume.zip

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