Troubles in sorting list

Replies to This Discussion

Permalink Reply by Danny Boyes on July 9, 2011 at 7:01am

To get the spiralling effect you would probably have to include a Shift List component that causes the curve to select the next point around at the next frame. The Wrapping Boolean should be set to True.

 

Permalink Reply by François Hamon on July 9, 2011 at 7:39am

That's it^^

 

Many thing new for me here, first of all the Graft, I understood mostly how usefull it is here, but I can get how the Shift list works here... Do you have a tutorial in mind that I could use to understand this better? 

 

Whatever. The definition works now the exact way I wish! Thx a lot

Permalink Reply by François Hamon on July 9, 2011 at 11:55am

One more stupid question :

 

now I've a list of point showing up this way

 0 = x

1 = y

2 = z

etc...

 

How to turn it this way? 

 

0 = x

1 = x+y

2 = x+y+z

etc...

 

Thx again!

Permalink Reply by Danny Boyes on July 10, 2011 at 1:19am

If you haven't worked it out by now the Shift List component will move the placement of list items. eg

List (A,B,C,D)

Shift List = 1 --> (B,C,D)

Shift List = 2 --> (C,D)

etc

Now introduce the Wrap value = True

Shift List = 1 --> (B,C,D,A)

Shift List = 2 --> (C,D,A,B)

You can also use negative values.

Shift List = -1 --> (A,B,C)

Shift List = -2 --> (A,B)

and with Wrap = True

Shift List = -1 --> (D,A,B,C)

Shift List = -2 --> (C,D,A,B)

 

The most useful Shift List action I use is to either get rid of the first or last item in a list and sometimes both.

Shift list = -1 --> (A,B,C) Shift list = 1 --> (B,C)

 

In the example posted above you are creating a shift list value equal to its location along the curve. The first section = 0 doesn't get shifted, the second section gets a shift = 1, third = 2, forth = 3 and because the wrap value is set to true the fifth section gets back to 0, sixth = 1 etc etc. creating the twisting effect.

 

The "one more stupid question" answer is Mass Addition. You will find the component on the Math tab or you can type it into the Keyword search feature (by double clicking the canvas). This component has two outputs a total amount for each list and a partial set of results giving:

List (3,6,9,12)

{0} = 3

{1} = 3+6 = 9

{2} = 3+6+9 = 18

{3} = 3+6+9+12 = 30

Permalink Reply by François Hamon on July 12, 2011 at 2:25am

Thx again danny for all the info. I finally found the "search" function in the forum and it seems that my next issue is not an easy one.

 

I would like to control the distance between circles ("arches") based on multiple attractor point. Basically the "bridge" is beared by columns and near those columns the effort in the structure increases.

 

In GH the matter is to divide the main "path" curve, not into equal segments but in smaller segments when it gets closer to the attractor points (would be several columns, not only one...)

 

The only thing I found out so far (wich doesnt work) : 

Permalink Reply by Danny Boyes on July 12, 2011 at 3:42am

You could use the subcurve Component to get sections of curve near your attraction points and then divide these curves to get pFrames

Attachments:

• subCurve_CP.ghx, 275 KB

Permalink Reply by François Hamon on July 12, 2011 at 11:09am

Nice! it's a good workaround actually, it needs a bit of "inacurrate" tuning but well

Now it's working fine!

Permalink Reply by François Hamon on July 13, 2011 at 8:33am

Well the issue is, I got now two lists, one grouping the points from the division of subcurves near the "columns points" and the second one grouping the points from the subcurves away from the "columns points"

(the set didnt change from the picture above)

 

so param viewers show me (with 3 columns points)

1 list with 3 branches : {0;0}/{0;1}/{0;2}

an other with 4 branches : {0;0;0}/{0;0;1}/{0;0;2}/{0;0;3}

 

I tried to merge those 2 and then input the list in a path mapper but could'nt manage to make it work to get :

{0;0;0}/{0;0}/{0;0;1}/{0;1}/{0;0;2}/{0;2}/{0;0;3}

 

Am I using the right component?

Permalink Reply by Danny Boyes on July 13, 2011 at 8:37am

can you upload the ghx and 3dm files?

Permalink Reply by François Hamon on July 13, 2011 at 9:52am

Sorry didnt check for reply so fast! :)

Here they are

Attachments:

• metrophylle_attempt.3dm, 47 KB
• Metrophylle_attempt06.ghx, 382 KB

Permalink Reply by Danny Boyes on July 13, 2011 at 10:03am

In this situation I think the best approach would be to Flatten the data and then sort it according to its position along the curve.

Attachments:

• Metrophylle_FlattenSort.ghx, 409 KB

Permalink Reply by François Hamon on July 13, 2011 at 10:15am

Damn... so easy :(

• ‹ Previous
• 1
• 2
• Next ›
• Page