Deleting Faces as they are drawn -splats

Chris Fullmer

I've been working on a plugin and it erases faces as they are drawn with a simple entities observer. It just erases every face.

It worked great at first, but I keep expanding what the observer is doing. And somewhere along the line I've got it so that it splats a lot now. I think its because I'm doing things inside the start/commit stack of the rectangle tool.

But how would I queue up the face to deleted once the tool is done making the rectangle? Does that make sense?

TIG

face.erase! if face and face.valid? only tries to erase a face if it [still] exists...

Chris Fullmer

I'll play with that, but I'm 99% sure the face still exists when I try to erase it. I think it is being erased correctly, and it is only after the rectangle tool tries to complete itself that it splats.

Jim

It's not good to change the entities from within the observer method. You can use EntitiesObserver.onElementAdded to build references to the created faces, and then erase them from ModelObserver.onTransactionCommit.

thomthom

Yea, trying to do any modification to the model in reaction to an observer event is asking for trouble. ( see my old DoubleCut thread ).
Even stacking things off to onTransactionCommit isn't reliable, because onTransactionCommit doesn't map to model.commit_operation.

Dan Rathbun

You may need to combine your responces with a ToolsObserver