C# trimmed surfaces becomes untrimmed

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Permalink Reply by Giulio Piacentino on November 26, 2010 at 5:37am

Hi Jes,

use List<Brep>. RhinoCommon Surfaces are full surfaces in reality.
Breps should be able to contain the information that you need.

Hope it helps,

- Giulio
______________
giulio@mnceel.com
McNeel Europe, Barcelona

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Permalink Reply by Jes Tonsgaard on November 26, 2010 at 5:41am

You guys are so clever... Thanks, that worked.
So I guess that means that all trimmed surfaces actually are Breps!?

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Permalink Reply by Giulio Piacentino on November 26, 2010 at 6:03am

Well, yes, Grasshopper surfaces are Breps'es that have only one face. This way they can be trimmed.

- Giulio
______________
giulio@mnceel.com
McNeel Europe, Barcelona

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Permalink Reply by Oliver Sjöberg on October 18, 2011 at 10:51am

Hello Jes.

I'm actually trying achieve what your problem caused. But my skills in C++ are quite poor so I'm wondering if you wouldn't mind sharing you code or helping me a bit? What i'm seeking is a module which takes the trimmed surfaces and remaps them to untrimmed.

 

//Oliver

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Permalink Reply by Giulio Piacentino on October 19, 2011 at 7:12am

There's an Untrim component now. Do you think that it might help?

Thanks,

- Giulio
_________________
giulio@mcneel.com
McNeel Europe

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Permalink Reply by Mania Aghaei Meibodi on October 19, 2011 at 7:26am

Hi Giulio,

And where in the grasshopper is the Untrim surface? do you know? will the Untrim option rebuilt the UV of his trim surface?

Best

Mania

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Permalink Reply by Giulio Piacentino on October 19, 2011 at 7:42am

Hi Mania,

untrimm is a component you can find in Surface -> Util -> Untrim (you need a recent version of Grasshopper)

I do not think it's necessary for it to rebuild the UV parameterization. It's something completely invisible in terms of final form anyhow.

- Giulio
_________________
giulio@mcneel.com
McNeel Europe

Attachments:

• untrimmed-is-ways-a-quad-or-a-triangle.gh, 1 KB

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Permalink Reply by Oliver Sjöberg on October 19, 2011 at 11:28am

Hello Giulio!

 

Thank you for the tip but it does not take me where I want. I believed that when a surface is untrimmed the uv-coordinates are mapped to the new untrimmed surface. As i'm building a component which is placed in different surfaces segments created by splitting a master-surface. The geometry of the component is based in the uv-coordinate system and therefor it's nessesary for me to do a remapping of the new surface.

I did try to do new surfaces of the segments of the main surface but the uv-coordinate system is randomized which makes it hard to handle.

All the surfaces are reparameterised and evaluated in UV point 0.25,0.25

Is this possible?

 

//Oliver

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Permalink Reply by Giulio Piacentino on October 20, 2011 at 9:54am

Hi Oliver,

could you start a new thread and upload there a sample of what you are trying to do and what instead you are getting?

That would help understand. Thanks,

- Giulio
_________________
giulio@mcneel.com
McNeel Europe

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Permalink Reply by Oliver Sjöberg on October 22, 2011 at 6:45am

I made a thread last week about this problem. I have made a different approach to the problem after I posted but the last issue is still the same.

http://www.grasshopper3d.com/forum/topics/few-problems-with-interpo...

 

Thank you for your commitment!

Oliver

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Permalink Reply by michael sprinzl on October 20, 2011 at 2:08pm

hi jes, so the best is to use the brep input and use the faces like you are using surfaces

 

List<Brep> my_breps = new List<Brep>();
my_breps.Add(brep_in);
my_breps[the index of the list].Faces[always zero if it is a single surface]......... do what ever you want to do
 A = my_breps[0].Faces[0].DuplicateFace(true);

 

by using the brep objects you can do more freaky things with it for example if you join the surfaces you can find out the relationships of the surfaces

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