Surfaces and edges : 3 question to know how-to well do.

 From: Alomphega 19 Jun 2012  (1 of 11)
 Hello, At this state of my learning curve, I have some questions refering to the 3 numbers of the respecting arrows shown within the attached image : 1) why do this surface disappears from its edge ? 2) How can I make a surface covering this half empty circle ? 3) how can I erase this edge to obtain a smooth unique surface here ? Thank you very much for any help, Best Regards, Guy Capra, always working on few funny projects : www.nauticaerium.com ; www.conceptarum.com and so on... Attachments:

 From: Michael Gibson 20 Jun 2012  (2 of 11)

 From: Alomphega 20 Jun 2012  (3 of 11)
 5204.3 In reply to 5204.2 Hi Michael, Thanks for point #1, that's all what I needed to know :-) About #2 I cannot do that with planar, I have tried and re-tried, but nothing seems to work. & for the #3 yes, I made it small by small steps. This curve is the result of a line tangent to an ellipse joined then extruded. As it was joined as line tangented I thought the surfaces was smooth enough to not make an edge... Well, I will try to make big solids then cut in with bolean to obtain the good shape. Anyway it could be so cool if you could show me ! There you will find the 3dm file in attachment, please use it at your convenience. My Best, Guy Capra, always working on few funny projects : www.nauticaerium.com ; www.conceptarum.com and so on... Attachments:

 From: Frenchy Pilou (PILOU) 20 Jun 2012  (4 of 11)
 5204.4 In reply to 5204.3 > how can I erase this edge to obtain a smooth unique surface here ? it's not if there is a line(s), that want say that the surface are not smooth for a renderer engine! If you disable in the Browser Visibility of Edges, you can see that these surfaces are some smooth ;) If you want absolutly no line you must repair your object! Verify that you have not Points who are not necessary! The more easy is Copy Past from the original some parts and reconstruct them ;) If you have 2 same curves kill one and copy move the last for be sure that they are not fliped! Then at the end kill false original parts and assemble with news :) Ps Don't put your object with any orientation in the floating space because we must rotate it and past it on the gride for more easy to work on it ;) (times won) EDITED: 20 Jun 2012 by PILOU

 From: Michael Gibson 20 Jun 2012  (5 of 11)

 From: Alomphega 20 Jun 2012  (6 of 11)
 5204.6 In reply to 5204.5 Hi Michael, Say : for sure this helps a lot ! :-D Thank you very much for your time taken to work on my file and to answer me. This helps me a lot also with my understanding of MoI. (How to use Rebuild function with shortcuts or tab&typing, re-make point curves etc.) Strange : yesterday I was sure to have checked the lack of this small surface on the top of the half-cylinder without seeing any kind of surface... Anyway maybe I was too tired, so today is a very good day with its good news :-) Again thank you very much for your excellent help. Best Regards, Guy Capra, always working on few funny projects : www.nauticaerium.com ; www.conceptarum.com and so on...

 From: Frenchy Pilou (PILOU) 20 Jun 2012  (7 of 11)
 < That will fill in an end cap in that planar opening of the object, sealing it off and making it into a solid now !!! Never seen seen that!!! I was selecting each edges of a future face! :) here a simple click on one face of the object make the trick :) So in fact Planar is an automatic close volume engine !

 From: Michael Gibson 20 Jun 2012  (8 of 11)
 5204.8 In reply to 5204.7 Hi Pilou, > !!! > Never seen seen that!!! But yes you have! :) Because didn't you translate the reference for Planar here which describes it and shows an example too? : http://moi3d.com/2.0/docs/moi_command_reference7_French.htm#planarsrf :) But yes, it's a shortcut - if you select an entire surface object instead of selecting curves you can then run Planar and it will find sets of open edges that make planes, then construct the planes there and join them in to seal them off, so it combines a few steps doing it that way. - Michael