Trim surface

Replies to This Discussion

Permalink Reply by Moonbeast on August 7, 2011 at 9:42am

I am not entirely sure what you are trying to do, you have a rectangle and a surface to halve it? It can be a long way around but if you intersect the two with BBX and then use the output curve to split the rectangle you will end up with what you want, lastly you'll want ti put some condition into the definition to select which half you want to keep.

 

hth

Permalink Reply by Sebastian L. on August 7, 2011 at 10:14am

maybe this helps?

 

http://www.grasshopper3d.com/forum/topics/surfacetrim-workflow

Permalink Reply by Pieter Segeren on August 7, 2011 at 1:04pm

Hi Melissa, sounds like you want to use a List Item after the SrfSplit (and leave the i set to the default 0), for instance.

Permalink Reply by Melissa Jimenez on August 8, 2011 at 8:07am

I am not sure what i am doing wrong... i can not seem to get it to trim... I have extruded it to see if it would delete it but it did no work.

 

Here is the definition i used to try to trim the curve.

 

 

What i need to do is remove the area that is show in blue from the red area. I was able to select the roof and create the rectangle shown in blue but I do not know how completely remove it.. If someone  could please help me that would be great because i am desperate ... THANK YOU

Permalink Reply by Benjamin Golder on August 8, 2011 at 11:08am

Melissa, what is coming out of your 'RDiff' component? That whould be the shape you are looking for. Can you take a screenshot of that result?

Permalink Reply by Melissa Jimenez on August 8, 2011 at 9:04pm

I am not sure what you mean by what is coming out of the Rdiff component here is a screenshot of the file

 

I have tried to do preview after the Rdiff but i do not see any difference.

 

here is a screenshot of the model with the rdiff on and the rectangle on.. but I thought that i would actually be able to see an opening on the roof.

Permalink Reply by Michael Pryor on August 8, 2011 at 11:27am

would'nt you use solid difference or trim solid?

 

So just extrude the blue rectangle downward the same height as the red then do solid difference.