Hi, I am trying to represent the famous ionic capital of the greek order. I have some problems with a surface behind the spiral. I found a pdf which suggests to use a sweep 2 rails command, but the result is not the right one since the surface which is created is too “curved”.
Attached a pdf that explain it better (in red my result).
Thank you for your helpcapitello ionico per forum.pdf (1.1 MB)
Hi Brunno- can you post the curves and the surface you get from them?
-Pascal
Hi Pascal, thank you for your reply. Yes, attached there is the file (in red curves and result of sweep 2).
I remember that it is suggested to transform the result of the sweep 2 operation with a isoparametric surface sorting some control points in order to reduce the curvature of the surface, but I don’ t understand how…
Ionic capital.3dm (474.3 KB)
Hi Brunno - I’m not sure I am getting at what you need here, but take a look at the file attached - does that make sense with what you are looking for?
Ionic capitalSrf_PG.3dm (60.0 KB)
-Pascal
Hi, yes this is what I was looking for, but still looking it from the frontal camera I can see the generated surface behind the spiral. The spiral should cover from the view the surface behind it.
I read the paper and it says a way can be extracting the isocurves and modifying their curvature and then using loft command.(pic of pag 12 from the pdf I shared) (I can’t modify the isocurves correctly).
Hi Brunno - If I understand then, the second, inside, curve is in the wrong place?
Ionic capital_PG2.3dm (95.6 KB)
-Pascal
Hi Pascal, yes exactly, the final step is to modify the isocurve throw control points and rebuild the surface with sweep 2 rails command, including the modified curve.
In particular, as you did, I had to draw the final section curve when using sweep 2 rails command. In this way the surface resulting is less curved and look like more similar to the one I was looking for.
(In the ionic order the section curves have a specific proportion, and they shoukld be used to create a correct representation).
These my results
Hi all,
I am aware that this conversation is 5 years old but this is the closest thing I have seen to a proportional looking ionic capital on the forums. I can’t seem to download any of the files and would like to understand how the thickness of the spirals are achieved as well as the bowl-like depth in the recesses of the capital.
Thank you all and apologies for the inconvenience.
