Smoothing Angle Issue

[Steve Barrett]

Recently I've started having an issue with a chair model displaying correctly when using hidden-line mode. The model is very simple (the legs are just 3d polygon lines) as I sometimes need 16,000 or more of them in my drawings.

When I render the legs and the back supports disappear.

I started playing with the smoothing angle setting and if I set it to zero, the problem goes away. The issue with this setting is my curved trusses take on a faceted look which requires a smoothing angle of 10 or more.

Any ideas or suggestions?

Steve B.

[Steve Barrett]

I had the wrong info on my previous signature

[michaelk]

I don't know why this works, but it does.

Add a vertex to the legs. It seems go off the deep end when you render a colinear 3D poly in hidden line with a smoothing angle.

But as soon as the leg is non-colinear, it works fine.

Maybe somebody out there will know why.

hth

michaelk

[Steve Barrett]

Well this is odd. I added a vertex to the legs and support and when I render I get 1 leg only.

[michaelk]

Again, I have no idea why this works.

But all you need to do is add a little bend at one end of the leg or back support.

It works. Don't know why.

hth

michaelk