Switch Addictive to Subtractive features in LPDP

[leoheck]

Hi @DeepSOIC,
I have some Bodies that I apply to a base Body using Lattice2, and this works perfectly.

My workflow is to model a feature and then “add” it to the main model using LPDP like a screw boss with the hole in it.

Now I need to change the design style to make my life easier on some steps. So instead of adding LPDP features, I will need to remove them.

So I’m wondering whether LPDP has a feature that allows converting additive operations to subtractive ones (and vice versa). This would let me reuse my existing features.

Beyond that, it would allow the designer to model the final feature, see it in its final form, and then apply it as a negative to the existing model.

[DeepSOIC]

yes, see "Sign Override" property

[leoheck]

Oh that is great, thank you.

[leoheck]

Took me some time to actually be able to use this feature since I am having this problem with performance.
But it worked perfectly on this first inverted boss. This is awesome, dude!

Then only thing I've noticed it is adding some circular mass under the feautre for some reaosn, but it may be something weird on this body that I have to check. Ah, probabbly the chamfer I am manually adding... I will have to improve this, but so far so good.

[DeepSOIC]

Btw, have you seen my experimental scoped recompute feature of Part-o-magic?
DeepSOIC/Part-o-magic#82
It is unlikely to help with the attachment editor lags you have, but it might still make your life easier.

[leoheck]

Yes, I saw it, and I want to test it, but I have been really busy recently.

[leoheck]

I have problems on many fronts haha.

[DeepSOIC]

no worries, it's probably a good idea to wait a bit till i include it into mainline part-o-magic as an option

[leoheck]

It is interesting how easier it is to work on a negative version of the design since I dont have to model the top external geometry.

I can also catch issues I would have to fix weeks later after people complaining.

[DeepSOIC]

i'm very glad you found a use for it, i actually thought that this feature is mostly a gimmick =)

[leoheck]

Bah, this feature was perfect in this case, please keep it! haha

[leoheck]

I will have to continue working later on. But I was able to reuse existing bosses. with minor to no workaround, this fearure is a life saver.