Hi MOIers,

I attached a file and a screenshot of a modelling challenge I am currently facing.

Version a1 to the left shows a shape where the profile is gently fading out vertically,

What I want to achieve is depicted on the right (a2) - the same profile fading out gently
but the fade out should end in an arc and then progressing linearally.

Difficult to explain but I hope you got it.

Thankful for tips ! Tom

Hi Tom, it's difficult to impose a good quality arc shape at the end using all vertical planar stations with Loft.

You might try building the arc structure first as a thin strip using Sweep, then do a blend between that strip and a central piece kind of similar as what's shown here: http://moi3d.com/forum/index.php?webtag=MOI&msg=7516.11 notice there how there's some open space between the pieces that is filled in with Blend.

Let me know if that doesn't make sense.

- Michael

Hi Michael, I am always amazed by your support, thenk you for replying so fast.

<<Hi Tom, it's difficult to impose a good quality arc shape at the end using all vertical planar stations with Loft.>>

I used Network. In the attachment the original file which is more complicated as it is curved. Thats why i had attached a simplified version which is the one we are talking about.

I have tried to sweep and blend and have gone through the example of Chip without success. I will have a closer look at it again.

Hi Tom, the curved shape adds quite a bit of complexity, is it possible to do a flat version and then produce the curved one by using Flow to deform it?

The method I was thinking of was to maybe focus on the arc end shape first by building something like this:



The idea there is to focus on the end shape by itself near the tip there, also you could construct this out a wide area and maybe trim off excess later. Then the center part gets surfaced separately with some space around it and a Construct > Blend is used to connect them together.

This is a lot easier to control with a flat shape though which is what I had thought you were doing...

Another possibility might be to make a shape that extended and dipped downwards past the outer surface and then got trimmed off something like this:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4824.10

- Michael

Ok I have nt considered sweeping in this way, seems to be a
good approach. I´ll give it a try. Thank you !

Hi Tom,
is this the type of result you want.
I networked the Bulge without the fillet and then tried various
fillets and blend solutions.
Hope it helps.

Barry

Hi Barry, thats coming pretty close. Do you still have the files to have
a closer look ?

Hi Tom,
here is the file hope it helps.
Barry

Here is a method of using blend. Adjusting the creation surfaces will control the bulge position.

A big thank you to you MOIsters for your help will download the files and get inspired !