Element normal

Altair Community Member

Oct 30, 2018

Updated Oct 4, 2020 by sumitbabbar427

Need some information regarding element normal.
As per my knowledge element normal represents the positive side of shell elements but when I display both color as well as vector display opposite nature observed. Element normal representing negative side(i.e. red)
I defined thickness in negative direction(i.e. SNEG) and it is offsetting the elements outwards that means HM is following color display convention. Is it HM bug or something I am missing?

<?xml version="1.0" encoding="UTF-8"?>

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Altair Forum User

Altair Employee

Oct 30, 2018

Updated Oct 30, 2018 by Altair Forum User

Hi @sumitbabbar427

In HM RED represents Positive.

<?xml version="1.0" encoding="UTF-8"?>

sumitbabbar427

Altair Community Member

Oct 30, 2018

Updated Oct 30, 2018 by sumitbabbar427

Thank you for update.

If red is positive (which means vector representing face is positive) then why upon defining SNEG in property element thickness offset in outward/positive direction? Refer picture shared earlier

sumitbabbar427

Altair Community Member

Nov 1, 2018

Updated Nov 1, 2018 by sumitbabbar427

Any update pls?

Simon Križnik

Altair Community Member

Nov 1, 2018

Updated Nov 1, 2018 by Simon Križnik

Hi @sumitbabbar427,

the explanation offered by @Prakash Pagadala is consistent with the screenshots you presented.

How about just reversing the normals?