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How to calculate 3D objects’ volume?
Posted: Mon Sep 20, 2021 6:08 am
by JamesGregory
Hello to all! Would someone tell me how i can calculate the volume of 3D objects plz? Thanks a lot.
Re: How to calculate 3D objects’ volume?
Posted: Tue Sep 21, 2021 6:33 pm
by daniel
Re: How to calculate 3D objects’ volume?
Posted: Thu Sep 23, 2021 10:13 am
by DA523
Sorry I deleted this post by mistake ...while posting a new one
how to recover it
Re: How to calculate 3D objects’ volume?
Posted: Sat Oct 02, 2021 4:01 pm
by 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