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Regular Contributor
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Tolerant 1-sided edge?

Hello,

1. Is it true that 1-sided edge can be tolerant? Say, we had a tolerant 2-sided edge, then one of the adjacent faces was deleted or unhooked - the edge becomes one-sided tolerant edge.

  If the answer to the question 1 is yes, the the second question is:

2. What's the good practice - does it make sense to have a 1-sided tolerant edge, or it is better to "detolerize" it (for stability of downstream operations) ?

Thank you!

 

Spatial Employee
Posts: 151

Re: Tolerant 1-sided edge?

hi

 

Tolerant 1-sided edges are possible.  In the case you mentioned (unhooking one face incident to a TEDGE) and in some other cases.  The TEDGE tolerance is defined by the gap between the 3D curve under the EDGE and the PCURVE.  If you construct a face where some of the boundary edges do not lie within SPAresabs of the surface, it will be a TEDGE.  I don't think you need to modify TEDGEs manually though, with one exception.  If you have a edge where the incident faces intersect sharply, api_lop_tigthen_gaps can be used to create a new edge geometry by intersecting the neighboring surfaces.  In principal, sharp edges shouldn't need to be TEDGEs, because ACIS can intersect the surfaces for you.

 

cheers

 

Eric

Regular Contributor
Posts: 55
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Re: Tolerant 1-sided edge?

Thank you!

Did you mean api_tweak_tighten_edge for sharp edges?

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Spatial Employee
Posts: 151
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Re: Tolerant 1-sided edge?

Yes.  My memory slipped a bit there.  I remembered the name of the scheme command rather than the API, but you figured out what I meant to say.