Difference Between Feature Angle and Vertex Angle

Hi

Vertex angle is angle between element's free edges

Do I understand correctly that it is the angle between the edges of two different elements?

If one had a mesh of all equilateral triangles it would be a very good mesh. All of the angles will be 60 degrees. The panel came up with a default vertex angle of 30 degrees. That would require that all of those equilateral triangles be divided again. That doesn't make sense to me. Either I don't understand the vertex angle, or it should be set to something greater than 60 degrees.

Ah wait, you said free edges. I have to think about that.

I remember that not only free edges, but also feature elements are taken into account

note that vertex angle  is angle between 'feature elements' , it is not 'feature angle'

to see feature elements, enter Tools>feature,  it appears depending on feature angle

I found the Tools>Features panel of which you spoke. I didn't know about it, and it can be helpful.

It doesn't help with vertex angles.

I appreciate your help, and feeling like I'm really being dense about this, but I'm not getting it.

I have attached a screen shot of a model I am working on now. I have shown the features. Maybe you can point out or describe vertex angle from it.

Thank you.

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Hi,

this captures may help you figure out vertex angle:

these are vertex angles: 

when automeshing, I set feature angle to 90D while vertex angle kept 30D, you can see inside features were neglected

but outside free edges not changed, because vertex angles>30D make vertices (yellow nodes) become anchor nodes

Very good illustrations. I think I see now.

I appreciate the time you put into this.

Thank you very much.

Phil