Shell and keep cavity?

kleerkoat · February 27, 2020, 11:57pm

anyway this is possible? i’d like to keep the volume it is removing.

markintheozarks · February 28, 2020, 1:47am

Have you tried offsetcrv command with solid as no? Then cap or make a surface to close.—Mark

kleerkoat · February 28, 2020, 1:52am

i’m not following you, i’d like to keep the area shell cuts away. not sure what you mean?

DiegoKrause · February 28, 2020, 2:39am

you can extract the thickness surfaces and copy the inner surfaces, then join the first surfaces again.

jeffhammond · February 28, 2020, 3:40am

you can do it via copy/paste and undo

Shell the object
ctrl-C
undo
ctrl-V
then do a boolean difference with the two

kleerkoat · February 28, 2020, 2:33pm

i tried that but the boolean difference is failing on the attached file

example.3dm (126.9 KB)

kleerkoat · February 28, 2020, 2:35pm

hmm, that would work if i only removed only one surface i think.

DiegoKrause · February 28, 2020, 11:17pm

you can extract as many surfaces as you want. the boolean sugestion is not good because it have to work with almost all coincident surfaces and that often lead to errors.

kleerkoat · February 28, 2020, 11:19pm

i just did one manually like you said and it wasn’t too bad.

DiegoKrause · February 28, 2020, 11:30pm

in that example would be something like this:

( I moved the red and blue surfaces to make it more clear)

kleerkoat · February 28, 2020, 11:35pm

that’s freaking brilliant! that’s priceless to me.