I'm not able to call my curve and point in order with Loft or Interpolate Curve

Hello,

I try to generate a volume by drawing cross sections on a 2D canvas, and move those cross section at the right place.

So far I'm able to bring my curve at the right place.

But when I tried to create a Loft or Interpolate Curve GH do not keep the order.

When I bake my point and curve I'm able to create my Loft or Interpolate Curve in the right order

I'm sure my node can be simplify, it's my first project in GH

See attached:

My Rhino and GH files.

Jpeg with the order of my point

Thank you

Davoud

Attachments:

ProtoForum.gh, 76 KB
Screen Shot 2016-04-04 at 2.22.17 PM.jpg, 64 KB
ProtoForum.3dm, 221 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on April 4, 2016 at 6:40pm

Your Rhino file refers to missing files:

In general though, the problem you describe likely has a solution similar to this one:

Loft a series of curves

http://www.grasshopper3d.com/forum/topics/loft-a-series-of-curves?c...

It uses the 'Merge' component to make explicit the sequence of curves connected to 'Loft'.

P.S. You'll also need to 'Flatten' the list of curves being passed to 'Loft'.

Permalink Reply by davohadi on April 5, 2016 at 10:45am

Hello Joseph,

Sorry I don't understand.

Why are you using the "item' and "merge"? Those functions do not give me the order of my curve like clockwise.

Also, what do you mean by flatten the list of curves?

Thank you

Davoud

Permalink Reply by Joseph Oster on April 5, 2016 at 12:07pm

'Merge' gives you an explicit way to sequence the station curves used by 'Loft'. It's not necessary if you manage to connect the wires in the correct sequence but it's all too easy to connect them out of sequence, which wll cause 'Loft' to fail.

'Flatten' is necessary in this case because 'Loft' requires the station curves to be in a single list, not spread across multiple branches as indicated by the double dashed line between 'Crv' and 'Loft'. Right click on 'Crv' and select 'Flatten':

Permalink Reply by Joseph Oster on April 5, 2016 at 2:08pm

Check this out - note the use of 'Merge' to explicitly define the sequence being passed to 'Loft'.

HOWEVER... There is another factor here that is not quite as obvious. Notice how the inputs to 'Merge' have been 'Flattened'? It is not sufficient to 'Flatten' the output. This happens because some of the curves have different tree/branch structures than others. Using 'Flatten' before 'Merge' and/or 'Loft' fixes the problem, making them all the same.

Attachments: