How to select only created sketch objects?

EFish

I've been working on improving the part lightening script that I made, and have run into a issue that I can't think of a way to get past. I have the script create rectangles follow the path of selected lines to make the ribs between parts. But I'm running into the problem where the extrude operation includes automatically generated faces from enclosed regions. 
Like so:

When I want the selection to be like so:

Does anybody know how to do this?

Thanks in advance 

kevin_o_toole_1

One option is to make multiple sketches and extrude them all.

var toExtrude is array = [];<br>// sketch1, has one rectangle<br>toExtrude = toExtrude->append(qSketchRegion(id + sketch + 1));
...
opExtrude(... "entities" : qUnion(toExtrude) ...);

In Onshape, sketches really only have their 1d entities until skSolve is called, at which point all relevant regions are created (imprinted). So, without splitting into multiple sketches, the in-between regions are not easily distinguishable from the ones you want. If you modeled this without code you might rely on manually selecting the right regions instead of making many sketches, but with code we can just automate the sketches so that's easier!

EFish

Oops I forgot to add a link the document. Here it is:
https://cad.onshape.com/documents/028ca8fb10baf53e1f6fce96/w/b1250a450d0ba88f0a8b1811/e/ef08c3ab65c0c74bdd957fed?renderMode=0&uiState=61d895056356e07fd6176e97

kevin_o_toole_1

One option is to make multiple sketches and extrude them all.

var toExtrude is array = [];<br>// sketch1, has one rectangle<br>toExtrude = toExtrude->append(qSketchRegion(id + sketch + 1));
...
opExtrude(... "entities" : qUnion(toExtrude) ...);

In Onshape, sketches really only have their 1d entities until skSolve is called, at which point all relevant regions are created (imprinted). So, without splitting into multiple sketches, the in-between regions are not easily distinguishable from the ones you want. If you modeled this without code you might rely on manually selecting the right regions instead of making many sketches, but with code we can just automate the sketches so that's easier!

EFish

Ok, that would work for this case very well, I am a bit concerned about the effect on the performance this method may have. But I'll try it out to see how it does, thanks!

kevin_o_toole_1

Performance is easy to check with the FS profiler: https://cad.onshape.com/FsDoc/debugging-in-feature-studios.html#profiling-regeneration-timings
As you're not making thousands of sketches I wouldn't think the performance should be hugely different!

EFish

True, it works great! Thank you Kevin!