Solid Difference Wholly within Brep

Grasshopper
1

Hi All,

I like to get an understanding as to why my Solid Difference does not seem to work as I am expecting

Solid Difference.gh (15.0 KB)

Some background info. I am trying to create a precast plank with an internal void. If I have the void Pipe intersecting a face, it creates the difference,

image
image463×547 11.4 KB

However, when I have the void Pipe positioned correctly (wholly within the Brep), it does not create the difference.
image

I have extracted the data and placed it in the attached GH file.

Is this how it should behave? are there any workarounds?

Cheers,

Brent

2

Yes.

When in the practice I’ll post a C# that does that: a solid with a void inside (but keep in mind that R is a surface modeler).

3

See the discussion here.
Giving a ‘solid’ brep an empty inside - Grasshopper (grasshopper3d.com)