VB component error

I am trying to implement the ShrinkSurface command from within the VB component but am getting an error.

The component is set up like this:

I get the same error when the component type is set to "surface". I have no idea how to make this seemingly simple problem go away. I suspect the trimmed surfaces are creating issues for me with the unroll command later down the line, I would like each panel to be a discrete surface so I am able to reference the center of each panel to nest and number them.

Any insight?

-dallas

Replies to This Discussion

Permalink Reply by Daniel González Abalde on February 26, 2016 at 6:26pm

where you've seen this method? The brepFacelist class has ShrinkFaces() method, perhaps this?

Dim x As New brep
x.Faces.ShrinkFaces()

You can look at the sdk to find all methods of rhino classes.

http://www.rhino3d.com/download/rhino-sdk/5.0/release

Permalink Reply by Dallas Swindle on February 26, 2016 at 7:56pm

I got the bits I tried from this thread: http://www.grasshopper3d.com/forum/topics/shrink-trimed-surface-to-...

I'm not knowledgeable with code , how does the bit you reference there go into the script?

This is what I tried:

Permalink Reply by Daniel González Abalde on February 26, 2016 at 8:09pm

This thread is of 2009. Ok, you have:

Private Sub RunScript(ByVal x as Brep, ByRef A as object)

End sub

You are saying, set me an input with item access, of type brep and named "x". The data plugged in that input, inside your code will be accesed with "x". Then, "x" is your brep (a reference of it). If you write "x." (x and dot) and you will see the methods and properties of the brep class. So:

A = x.Faces.Shr...

Permalink Reply by Dallas Swindle on February 29, 2016 at 11:33am

ok! I've got the error sorted, but now I am getting a boolean value out from A.

How do I get the shrunk surfaces?

thank you so much for your time!

Permalink Reply by Dallas Swindle on February 29, 2016 at 11:44am

additionally, when I add a second output per the above referenced thread, I still get trimmed surfaces out.

Permalink Reply by Daniel González Abalde on February 29, 2016 at 11:52am

Sorry, my fault. Is:

x.Faces.ShrinkFaces()

A = x

the ShrinkFaces return booleans, true when the method was successful. The x (the brep) is different in the next line of code.

Permalink Reply by Dallas Swindle on February 29, 2016 at 12:09pm

ok, so the parenthesis designates a non-boolean output?

I'm still getting trimmed surfaces as a result:

the trim lines should be isolines from the original surface so the trims should be parallel, I don't understand why it's still returning trimmed surfaces.

Permalink Reply by Dallas Swindle on February 29, 2016 at 12:12pm

oh wait... there are holes in the surfaces...

Permalink Reply by Daniel González Abalde on February 29, 2016 at 1:06pm

Lol

I'm sorry but I'm talking about writing the code. I've never used that method so I dont know what it does, and I do not know what you're trying to do.

Search on the SDK, or better, ask in the mcneel forum to help.

The () only means that this method not contains/needs arguments. Arguments are the "parameters" like: Private Sub RunScript(ByVal x as brep, ByRef A as object).

The process is:

-Gh reads VB Script.

- the reading reaches the method RunScript, which is set with an argument x as input (and as brep) and A as output (and as object).

- Read next line: x.Faces.ShrinkFaces(). This produce a boolean as result, but in this case we not collect the result. However make some change in "x".

- Read next line: A = x. The modified brep is returned in A.

- ...

Permalink Reply by Pieter Segeren on February 29, 2016 at 4:12pm

If the 'holes' are the only trimmings, then ShrinkFaces method is of no use here.
Also note that the method is supposed to result in trimmed surfaces. (maybe you mistakenly expected untrimmed surfaces??).

Permalink Reply by Dallas Swindle on February 29, 2016 at 5:29pm

they are not the only trims.

there are rings that need to be subdivided every 8' to allow for fitting on a sheet of steel. each piece has some holes in it. The original pieces are the full ring, I then subdivide based on a length domain to create cut-able pieces.

Permalink Reply by Pieter Segeren on March 1, 2016 at 3:48am

I see. I created a simple definition to mimic your situation. I hope it clears things up for you. I guess you're going to unroll the pieces and wanted to shrink the surfaces for that purpose, right?

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