CGAL users discussion list

[Pierre Alliez <>]

hi Atul,

if you can decompose your polyhedron into a set of tetrahedra - then you 
can use the internal function of the PCA component - which computes the 
covariance matrix of such set. the inertia matrix is then trivially 
deduced from it.

if you can suggest a nice API for this type of need I may think of 
adding this function into a future release.

Pierre

Pierre Alliez
INRIA Sophia Antipolis - Mediterranee 
Project-team GEOMETRICA 
http://www-sop.inria.fr/members/Pierre.Alliez/
Tel: +33 4 92 38 76 77
Fax: +33 4 97 15 53 95



Atul Thakur a écrit :
> Hi All,
> I need to find out volume and mass moment of inertia of given
> polyhedrons. I looked for cgal methods doing that but could not find
> any directly.
> If there is no such method existing I can write mine. Just want to
> check if there is some method hiding somewhere.
>
> Another thing is area moment of inertia of 2D polygons that I need to
> find. For that also I couldn't find any method.
>
> thanks,
>
> -Atul
>