Lost
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Hi all
A few day ago , i read a post on sketchucation about angle calculation between vector. but I can't find it again.My trouble is I have to find the angle between to face but I have to know if the angle is convex or concav (according face orientation).
I try many many things ( reversed line, reversed face,...), I don't understand how the normal face vector is compute,...
If some one remember this post or know the solution.
Regards
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@unknownuser said:
without garanty
http://sketchucation.com/forums/viewtopic.php?f=180&t=31448&p=277511
http://sketchucation.com/forums/viewtopic.php?f=180&t=50065&p=451039Thanks pilou, but that's not this. There were a scheme that show two angle between vector on positif and on negatif.
ps: tu a vu je te parle anglais maintenant -
I found it !!!! http://sketchucation.com/forums/viewtopic.php?f=180&t=19300
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@Adebeo
it's pity, I have seen the good thread and just the image on the top but don't scroll it!
@unknownuser said:
ps: tu as vu je te parle anglais maintenant
Me too!
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Ahh yes. Working on that type of thing too, as of speak.
Tough stuff.Maybe this can be of help as well, regarding getting the face rotation in space.
http://sketchucation.com/forums/viewtopic.php?f=180&t=33862&hilit=plane+on+plane
I'm doing something similar to Cleverbeans solution currently to find a face edges rotation in space. However it is difficult to exactly tell what a face have for "intentional" rotation depending on several matters. Where the edges are in relation to face and so on.
Scewed, tapered, N-gons and quadrilaterals faces etc that may not be perfectly square
need a lot of testing if you are going to align geometry on to them.Its quite frustrating business. As soon as something gets fixed some new problem arise and need further testing. There are of course mathematical formulas to calculate all this, but honestly. If one has that kind of knowledge one shouldent be sitting and programming Sketchup plugins for free.
It's damned rocket science as I see it.
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