I am pretty up to speed with poly modelers and am starting to tackle a helmet similar this one, but I thought that this would be cool in Moi or Rhino. Problem is that I am not sure how to start.

I know that it could be approached various ways, but it would be cool if I could get input especially with screen shots and/or steps on how you guys would lay out your curves, surfaces, etc.

I am really only concerned with the main shape and not the vents, cushion, visor, etc..

Any help appreciated!

Hi slayer, just as a very quick initial tip, I would probably try to form the whole helmet as one larger solid piece first and then cut the face hole part out as a trimmed hole instead of trying to construct surfaces that hug the hole boundary...

Just my initial impression from a first quick look.

- Michael

hi use sphere trim and blend

Hi lyes, thanks for sharing this blending technic ! I would never think to use this fonction that way :)

There are always many tricky technics! :)
< hi use sphere trim and blend...
...and box of deformation ;)

Still have a little question about the trim,

Is it 'normal' that when I try to trim A by B



I finish with an extra segment ?



(which is annoying for the blending :/)

Hi slayer.

A different approach with 'Network'

@ Pac
If I copy move the curve + the the line then trim outside the object all is fine :)
I believe there are several things selected when you click for select the curve!
And then the trim seems fail :)

>> If I copy move the curve + the the line then trim outside the object all is fine :)
I believe there are several things selected when you click for select the curve!
And then the trim seems fail :)

Sure triming the extacted curve works, the problem is that I need/want to trim the surface edge ...
And it's not like the trim failed, but it will add automatically a segment that I don't really need.

Just having a quick bit of fun. (Could not sleep!)
No problems doing it at all

Brian

Thanks for all the replies. I was able to achieve a basic shape from the method that Lyes showed. However, I am curious how to get the results with blend that Lyes is showing....

Quite mad!

Brian

Hi PaQ,

>> I finish with an extra segment ?

I have tried it to to trim A by B and
like you explained and,
it gave me the same problem

So it must be a 'bug'

Hi PaQ,

> Is it 'normal' that when I try to trim A by B

Currently it is - every closed curve, including trim curves has a "seam" point where the start of the curve touches the end of the curve.

It is not unusual for chunks of the NURBS library code to treat a closed curve or edge the same as an open one when it gets diced into pieces. That usually means that there will be a couple of extra small segments created, one from the "start" of the closed curve to the first cutting point, and then another one from the last cutting point to the "end" of the closed curve.

I've tried to clean this up in several places already, like when you trim a circle curve you don't get an extra point at the seam because of some extra work that I did to fix that case up.

I do expect to be able to improve the surface edge case as well, that is actually bumped up pretty high on the todo list. It can also help fillets to avoid diced up edges as well.

- Michael

Nice work guys, very cool design.

LOL, Brian, you're going all Captain Nemo on us! :-D

-Will

hi slayer use blend G1 2.5 , here is my resulte and is not finish yet

here is video how to blend audio on

http://www.screencast.com/t/x2q2eOMPEHN

Hi Lyes,

Oh that is so nice, very nice.

Can't wait to see the finish one.

Cool teasing! :)