Python to C# - Understanding mutability

Hello,

I've recently started working in C# and I'm realizing what a lazy coder I've been; I've got what is probably a simple problem. I'm attempting to split a Brep with multiple Breps, which is simple in Python:

cnt=0
while cnt<len(inlet_outlet_geometry):
base_geometry = Rhino.Geometry.Brep.Split(base_geometry, inlet_outlet_geometry[cnt], tol)
base_geometry = base_geometry[1]
cnt+=1

In this Python case, there are two surfaces (inlet_outlet_geometry) that are cutting (base_geometry). The loop iterates through each inlet_outlet surface and cuts the base_geometry once. Between cutting, the Open Brep index [1] is selected. Basically I'm cutting windows in a box, iterating one by one.

When I move to C#:

for(int i = 0;i < inlet_outlet_geometry.Count();i++){
base_geometry_out = base_geometry.Split(inlet_outlet_geometry[i], Rhino.RhinoDoc.ActiveDoc.ModelAbsoluteTolerance);
base_geometry = base_geometry[1];
}

I get the error "Cannot apply indexing with [] to an expression of type 'Rhino.Geometry.Brep". Are Brep objects immutable? Can I not overwrite the value of this brep? What am I missing? I have the type hints and parameter access set correctly.

thanks for your help,

Replies to This Discussion

Permalink Reply by Kyle Vansice on July 2, 2016 at 11:51pm

Thanks for the reply, I did declare the variable as a list access in the input param, so at the private Void RunScript level, I pass these in as Brep<List>. Is that not enough?

Permalink Reply by Kyle Vansice on July 3, 2016 at 12:19am

Ok, great thanks. I did try it out, and I'm only getting the one hole to cut however. This is what I'm getting with your script.

but this is what I'm inputting:

I've also attached the file. Thanks for your help.

Attachments:

Test2.gh, 12 KB

Permalink Reply by Kyle Vansice on July 3, 2016 at 12:46am

Ha, no worries, thanks again for your help. I just learned a lot.

Could you briefly explain the IF statement?

Permalink Reply by Kyle Vansice on July 3, 2016 at 12:52am

Ok, actually I think I got it. You're saying if the range is greater than 1 (meaning there is a trimmed surface and an open brep), then set the base brep to result index 1 (which is the open brep).

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