Is it possible to divide reference spline into sections without losing curve?

[d.drogman]

I'm modelling a curved seat - and as I have done previously I wished to create a solid form in each section, creating a nice curved seat. Creating the edge reference line as a spline works great for a nice smooth shape, however, it is one large plane - I cant select sections and create a individual forms.

This works no problem with a straight edge reference line but the result is of course poor/blocky. anyway I can keep these reference lines with the spline but have it divided into separate references where each point is? splitting them only makes them snap to a straight line. 

Thanks, 

Dan

[barthbradley]

I'm not understanding the question. Everything you are saying though makes sense.  Separate surfaces; yes.   I see it the same way.  

FWIW: Check out Herman-Miller Revit Families. 

[d.drogman]

The spline which acts as the lip of the chair - when drawn it is one reference plane, when I select it, or tab it, it's always the entire line.

Where as the line that meet and cross in the middle are separate references - allowing me to select the individual lines. I wish to divide that reference which is the lip into sections that match the points. 

However I am unable to split it up without it turning into a straight line. Can I devide that outer/lip spline into separate/divided references?

[d.drogman]

See here, the first image - the spline along the perimeter is one big connection. I want to be able to devide it up so it matches the points. 

Similair to the second photo which shows all the smaller references. 

I'm anable to create the forms I need if I cant divide up the large spline into on the outside into 8 separate parts. 

[barthbradley]

You cannot create a form from all of that at the same time. You need to create sections. Looks like 8 "triangle" sections in all. Should be pretty easy. All the Ref. Lines you need are there.  

[d.drogman]

Hello, yeah I know you have to do it in sections but how to I turn the outer spline into sections! 

[barthbradley]

Split 'em to remove the Spline. Or, make a new 3-PT Spline at each section. 

"!"?  

[bin]

Could you share the family please?

[d.drogman]

As I've mentioned before, splitting a spline turns it into straight straight edges, they lose their curve.

The question I have been asking, can it be split into sections AND keep its shape. 

I'l have a look at 3 PT spline but I'ver never heard of it. 

Thanks again for your replies. 

[d.drogman]

Hello,

here's the file, if you can split that outer line without losing its curve I'll be most grateful! 

[constantin.stroescu]

can you be more specific? - What is the Form do you intend to obtain?

• do you want to obtain a shell?
• or some steel frames that supports the seat? ( sweeps)

can you make a rough hand sketch to show the desired object?...maybe it is no need to break the splines ...

[constantin.stroescu]

if you want a shall based on your curves ...it will result something like that...

[d.drogman]

I wanted a shell like you have there! How did you do that? Would be delighted if you could tell me how you created that from the point in which the file I provided was at. 

[barthbradley]

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@d.drogman wrote:

As I've mentioned before, splitting a spline turns it into straight straight edges, they lose their curve.

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That's exactly what I said above.  "Split 'em to remove the Spline".

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@d.drogman wrote:

I'l have a look at 3 PT spline but I'ver never heard of it. 

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3 PT Spline is a Spline through 3 Points.  Same method you have been using throughout.  You could have made 8 of them (for 8 sections) in less time that it has taken to post this thread. 

[d.drogman]

I could have, but without your input I wouldn't have known how to do it. 

Not sure why you're throwing nasty little snide comments in - if you feel put out for offering help just don't bother. 

[constantin.stroescu]

you can, in fact, draw over the original spline, shorter segments  - Placement Plane not to be  Level 1...When placing the new spline wait to highlite the original spline and then place  the points - They are Hostet Reference Points , while they belong to the original spline...as shown in my screencast:

https://knowledge.autodesk.com/community/screencast/ac90411f-f451-4e53-99b4-9c868b9b92b0

[d.drogman]

Amazing - thank you so much! 

[barthbradley]

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@d.drogman wrote:

Not sure why you're throwing nasty little snide comments in - if you feel put out for offering help just don't bother. 

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Did it sound that way? Sorry. I'm in a good mood. 

[bin]

I tried the Generic model and it looks fine.

[d.drogman]

Thank you very much for this also - I did try it in a similar way at first but got irritated as Revit kept telling me it couldn't create a sweep at the angles I wanted. 

Great stuff though you've all been really helpful.