Troubles in sorting list

Hi everyone I'm new to Grasshopper and I'm trying a couple of tuts to get started.I'm trying to create a "bridge generator" wich from a basic curve as the main path would generate somehow the whole structure.It'd be made of circle archs linked by steel trusses winding around.
Thats what I achieved so far. It's fine this way, but the division of the "archs" are based on a known and common value for the radius.

I get troubles when I go for modifying randomly the radius of the circles, this way :

And trying the Divide curve operator works for generating the points, but then I cant use the list of points I get... Any idea to sort it in a right way to Interpolate a winding spiral?

Thanx a lot for your help!

Attachments:

image01.jpg, 239 KB
image02.jpg, 208 KB

Replies to This Discussion

Permalink Reply by François Hamon on July 21, 2011 at 7:16am

Hi again Danny.

Here is my last question...

I've got troubles using the last .ghx you sent me. it was like working on many curves but now I'm trying on the final situation I'd like to render, it's messed up. Just look how the vectors come out after the "sorting list" component (I just insert a "visualize vectors"...) (All the end of the definition isnt creating trouble)

Problems is that the circles look ok, but actually with the spiral script it becomes obvious that vectors flip at a certain point. (I've setted the viewport on this critical point)

Thx a lot once again

Attachments:

contexte.3dm, 839 KB
Metrophylle_attempt05.ghx, 1 MB

Permalink Reply by Danny Boyes on July 21, 2011 at 10:44am

You can use the Flip Component (Flip Curve Direction) to correct this. There is an optional guide curve input that allows you to force a direction if it does not comply. In this case you would use the first curve in your set and the only curve that would be flipped is the 58th.

Permalink Reply by François Hamon on July 22, 2011 at 3:50am

The workaround doesnt work here... What is the integer you have in your "list index" component?

But still what I dont get is that the vectors you are visualizing are supposed to be the "normal vectors of circle planes". but obviously, as I can see on the screen, they are not, right?

Permalink Reply by François Hamon on July 22, 2011 at 4:41am

Well I got my workaround. I actually splitted the vector list from the 58th and flipped the second half... merge and go!

But I still dont get what's wrong with the overall script :(

Permalink Reply by François Hamon on July 26, 2011 at 3:31pm

Sorry Danny, again one basic issue

Am just trying to move some planes according to vectors. It doesnt work at all... My vectors planes etc... seem well sorted...

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