BOOLEAN intersections

[mskin]

does anyone know why i get the funkyness with this boolean operation. essentially a mass and 72 planes, meant to intersect eachother so that the planes wold fit neatly inside the volume. as the images show...there is something funky going on here.

[Brian Smith]

that's odd...shouldnt be doing that...load er up and i'll have a look see

[mskin]

thanks

[LKlemenc]

Why don't you try booleaning with ProBooleans (they are included in Max9). Max's native booleans haven't changed from the first ver. of Max.

[mskin]

i tried that. probooleans has given me some really rgeat results... cleaner meshes. for some reaon i had less success with the intersection boolean - everything just dissapears.

[Brian Smith]

worked fine for me...don't know why it didnt work for you...maybe try rebooting your computer...sometimes that just fixes strange things

[mskin]

Brian,

still, why the imperfections (attached images). I can see why the narrow sides might be giving me issues, the four corners that border it are non coplaner, perhaps triangulating them will will help... ill give that a shot. But the last image shows where the intersection command didn't work quite as planned - in a triangular face. some of the slab edges are protruding out of the solid. the solid is a copy of the form used in the intersection so if the intersection worked correctly, i shouldn't be able to see it.

There is something fishy with these booleans.

[Brian Smith]

i wasnt looking for these imperfections so i didnt notice them...i am rendering on my machine right now and i'm heading home...i will take a look at it again in the morning

[daniohayon]

Originally Posted by mskin

still, why the imperfections

The first thing about your model is that it is not ready for the boolean operation.

The second thing is that you are trying to substract an object that hase no volume. That's why it dissapear when you use Pro.

I took half of the planes and fliped the faces upwards, selected every two borders from top down and bridge between them. resulting in a bunch of boxes (half in number from the planes). Then Pro with substraction option (made a copy of the building first) .

Then with the Window/Crossing selection tool, I erased the walls left overs. Ending up with the planes you need.

I'm at work in lunch break and can't send you the file because we don't have winzip on the system I'll email it to you if you post your address.

[Brian Smith]

got it to work fine after subviding both objects a little...i use the default value for the planes and 5m for the body object. booleans don't work good with long and skinny faces which is what you get when you dont have a dense enough mesh