Select points in a grid by a surface?

Replies to This Discussion

Permalink Reply by Vicente Soler on July 1, 2009 at 5:05am

create a vb.net component with the following code:
If x.IsPointInside(y, doc.AbsoluteTolerance, False) Then a = y

Connect the brep to the 'x' input and the points to the 'y' input.
The script will output the points located inside the brep.
The brep must be closed for it to work properly.

Permalink Reply by Ali Tabatabai on July 1, 2009 at 4:25pm

Dear Vincente,

Thanks for the VB hint,

I'm sure my surface is not 100% closed and therefor not working... actually I have a trimmed surface on top of a lofted untrimmed surface.

I can't really join them!

Is there a way to just use the surface as a proximate node and solve the points inside of the area?

I can do it, partly, by slicing the brep in planar surfaces and then cull the nearest point to those planar surfaces... but still I have the issue of getting the planar surfaces out when my brep when is not joined!

//ALi

Permalink Reply by Vicente Soler on July 2, 2009 at 6:20am

Is there a way you can 'cap' them and make them independent closed solids?

Permalink Reply by Ali Tabatabai on July 9, 2009 at 11:21pm

Hi,

I've been giving it a shot to cap/close the surface, but it's hard as it's a double-curved trimmed surface on the top of my shape!

I can trim the controlled surface on the top and I can cap the bottom of the lofted surface.

Is there a way to use a surface other than a closed solid? Practically the shape is enclosing the points inside...

Thanks
//ALi

Permalink Reply by Thomas Bildsøe on July 10, 2009 at 2:32am

What about using sections curves to do the test. Since the 3d grid is rectangular wouldn't it be possible to see which points would be inside section curves (which you close) for each level in the grid. Perform this for each of the surfaces that comprise the form, and the do a search for duplicates afterwards?

/Thomas