Grasshopper

algorithmic modeling for Rhino

alternative components or plug ins to create a surface

Hi everyone,i'm trying to design a parametric wind turbine blade and i am having some problems with the offset surface component,due to the quality of the lofted surface i created i assume. My major issue is that i can not offset the faces that form a section(surface) of the blade,towards the inner side,in contrast i can offset towards the outside direction,i believe that this is because of some discontinuities(loft) of the surface which does not allow the offset work in the direction that i want (maybe because the faces intersect between them in that direction). Firstly does anybody know a way to solve this problem and secondly is there any other components or GH plug-ins which i could use to generate mthe surface of the blade from a group of curves,such as the loft component?  I have already used all the components of the surface tab,including network surface which results null,without any satisfying outcomes.

Any help would be appreciated,thanks

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Replies to This Discussion

Thanks for your reply Tom,i 'll give it a try.When u say join my section curves with g2 continuity,what do u mean.About the continuity of the curves i suppose that you are refering to the curves that i used to create the surface(loft) and not to the curves that i used to create the faces(split surface) of the blade? And is there a component to join curves with a continuity option?

Hmmm...ok Tom,thanks again for your help

Could you offset the curves and create the two surfaces separately? 

I have already tried this method Damon and still the offset curve(and loose) components won't give me a good result when i offset towards the inner direction.

Short of going into Tom's suggestions about g2 continuity, I'd think that the offset points would work. I was thinking creating a grid of points on the surface--number in U and V could control accuracy--and offsetting those, would be quite effective and simple. I have a definition that does this that I could clean up and share with you (tomorrow) if you are interested.

Super-duper simple way of doing what I'm suggesting. I have no idea what kinds of surfaces will break it, but maybe it will elucidate the problem in another way to illicit a different solution.

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Thanks Damon,i 'll give it a try and i'll let u know tomorrow

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