elemental coordinate system in HyperView

You can calc them from node coordinates

Tria: origin=n1, x=n1n2

Quad: origin=center, x= mid ray of angle n2-O-n3

hi Tinh,

Actually, I tried that method. But it didn't work. there is something weird in system calculation in HyperView. Below is the output of my macro. there is a slight difference between my output system and the expected result. 

This difference becomes more significant when the warpage is large

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

An you adjust calculation with warpage?

I think x is ok

You need adjust z only. Can you do it?

I am able to get the normal direction of the element, nodal coordinates, centroid coordinates. I used these values to calculate the direction for the system. The result is as above.

If I need to adjust z, I don't know how much should I change, where can I find out the value for the adjustment 

Do you know how elem's normal is calculated?

I remember there's a topic about it. Can you search it

OK. let me check and revert back later