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 FasterCap and FastCap2
 Inconclusive test for normal flipping
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chgad

2 Posts

Posted - Feb 07 2019 :  11:43:00  Show Profile  Reply with Quote
Hello everyone ,

as the subject already states i get the error messsage as follows :

Input: idt_on_si_o2.lst
Surface idt_lower_cond_air.txt has 56 quads and 50 tris
Surface idt_upper_cond_air.txt has 59 quads and 28 tris
flip_normal: inconclusive test for normal flipping
Surface: dielectric.txt
Translation: (0 0 0)
Reference point: (0 0 1)
Panel corner: (0.5 0.5 -0.4)
Normal: (0 0 0)

I buillt FastCap2 from source (ht*ps://github.com/ediloren/FastCap2) for Linux.

So now i got 2 Questions:

1. What does this message want to tell me ?
2. How can i find out where the issue comes from ?

Enrico

371 Posts

Posted - Feb 07 2019 :  23:44:59  Show Profile  Reply with Quote
Please see ht*ps://w*w.fastfieldsolvers.com/forum/topic.asp?TOPIC_ID=1169 (you need to replace the * in the link, they are inserted to protect from spam; you can also search with the "Search" link on the top right the words "inconclusive test for normal flipping")

Best Regards,
Enrico


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chgad

2 Posts

Posted - Feb 11 2019 :  08:55:33  Show Profile  Reply with Quote
Hi, i read the article but it does not provide additional information on where the error originally occurs.

Is it because a face is incorrectly defined ?
Is it a round off error ?
(I might have identified the exact line :
Q 1
0.4999999701976776 0.4999999701976776 -0.4000000059604645
6.833333492279053 0.4999999701976776 -0.4000000059604645
6.833333492279053 6.833333492279053 -0.4000000059604645
0.4999999701976776 6.833333492279053 -0.4000000059604645
)



I remesh my model with the Open Source Program Blender :ht*ps://w*w.blender.org/.

I perform so called insets, and subdivides. If i only subdivide my models faces everything works as expected (although i do not get a convergences but that's a different topic.)

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