<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hey David,<div class=""><br class=""></div><div class="">Technically the user would not be allowed to create that edge since it would intersect the large face - the user could one of the following though:</div><div class=""><br class=""></div><div class="">1. Delete the model face, then create the edge, then build all possible faces (in this case 2)</div><div class="">2. Perform a split face operation which will result in the same topology as 1.</div><div class=""><br class=""></div><div class="">Bob</div><div class=""><br class=""><div class="">
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Robert M. O'Bara, MEng.<br class="">Assistant Director of Scientific Computing<br class=""><br class="">Kitware Inc.<br class="">28 Corporate Drive<br class="">Suite 101<br class="">Clifton Park, NY 12065<br class=""><br class="">Phone: (518) 881- 4931</div><div class=""><br class=""></div></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Sep 20, 2015, at 6:25 PM, David Thompson <<a href="mailto:david.thompson@kitware.com" class="">david.thompson@kitware.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">Hi Bob,<br class=""><br class=""><blockquote type="cite" class="">The situation you described would be invalid for 2d domains. Either there is the one large polygonal model face or there are two. To have all three would mean that a point in space would be "owned" by more than one model entity. If we were modeling a 3D contact type of problem then a spatial point could be owned by more than one model entity; however, those model entities could not belong to the same topological "network". <br class=""><br class="">Does that make sense?<br class=""></blockquote><br class="">I am happy to take things that way. :-) However, I suspect at some point we will see someone complain about a mangled model because they created the "large" face manually; then created the middle edge and ran the "create all faces" operator — which would either fail or create an inconsistent model.<br class=""><br class="">Right now, the "create edge" operator in my branch verifies the edge does not self-intersect but it doesn't do any checks against existing model faces or edges. Arguably it should not, since – as you say – users might want to construct several independent "networks."<br class=""><br class="">Maybe we should have a "model geometry lint" filter?<br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>David</div></blockquote></div><br class=""></div></body></html>