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BC Forums => BC Modding => Topic started by: candle_86 on October 04, 2009, 07:55:05 PM

Title: Boolean Cut
Post by: candle_86 on October 04, 2009, 07:55:05 PM
Ok now im getting confused here, here is the picture. I got the bridge and tubro shaft connected doing clones of both, then subtract B-A then Subtract A-B then Attach then weld then delete the inside polygons, but when I try this here, it doesnt work at all it flattens part of the saucer ect, but doesnt actully cut anything out of either shape and I cant figure this out. To give an idea im happy with the look of tiber so its getting redone
Title: Re: Boolean Cut
Post by: Daystar70 on October 04, 2009, 08:32:19 PM
From What i've encountered dabbling in any Boolians, your mistake was deleting the Polygons from the tube. you need to "Edit"the existent ones, you can convert it to editable Polygons, and after "smoothing" choose to make it a mesh welded, also "before"you boolian it try and ,make sure you "cap holes" your using 4 views or 3, but you may miss something if looking at it at certain angles..this is going strictly by old memory i recall a similar problem once. i could be wrong.
Title: Re: Boolean Cut
Post by: candle_86 on October 04, 2009, 08:36:11 PM
all holes are capped, that i ensure, i finally got it, took me a minute but thats welded along with the neck that gave me total hell lol
Title: Re: Boolean Cut
Post by: Daystar70 on October 04, 2009, 08:38:45 PM
Ahh okay cool :) i may download Gmax again and dabble with it i also like Zbrush to.
Title: Re: Boolean Cut
Post by: Adonis on October 06, 2009, 05:47:02 AM
Object A must be a seamless, error-free object.
Title: Re: Boolean Cut
Post by: Maxloef on October 06, 2009, 11:59:44 AM
also it needs to be UNION not substract :P
Title: Re: Boolean Cut
Post by: MarkyD on October 07, 2009, 09:48:09 AM
Yeah as they last 2 posts have said.. and also try not to even do it if you can..  there the skill lies  ;)
Title: Re: Boolean Cut
Post by: Phaser on October 10, 2009, 09:12:37 PM
I don't know, markyd.  I think it takes a lot of skill to get a boolean cut right!
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 14, 2009, 12:05:55 AM
I don't know, markyd.  I think it takes a lot of skill to get a boolean cut right!

Amen to that!
Title: Re: Boolean Cut
Post by: baz1701 on October 14, 2009, 03:59:20 AM
When I cut the deflector on the jjexcel mk2 it gave me no end of errors.

The mesh was error free prior to cutting though is was not very heavy on the polys

I used a standard cylinder as my object B with around 20 sides (it was even worse when I crank it upto 30 sides).

the cut is fine but the extra polys around the hole screw up the surrounding mesh.

A mix of poly collapsing and cuts easy the errors but I lose the perfect circle and there are still errors there.

I'd love to know how to do this better.
Title: Re: Boolean Cut
Post by: candle_86 on October 15, 2009, 03:28:39 AM
When I cut the deflector on the jjexcel mk2 it gave me no end of errors.

The mesh was error free prior to cutting though is was not very heavy on the polys

I used a standard cylinder as my object B with around 20 sides (it was even worse when I crank it upto 30 sides).

the cut is fine but the extra polys around the hole screw up the surrounding mesh.

A mix of poly collapsing and cuts easy the errors but I lose the perfect circle and there are still errors there.

I'd love to know how to do this better.

I cant agree more when I cut out my lower lip for the shuttlebay on the V2 tiber im working on I ended up with a boatload of poly's i didnt want and I cut the thing with an amazing 10 sided cylinder stretched and it only contacted 5 of the sides lol but instead of the normal vertex amount id expect i got alot of extras, I tried collaapsing the polies with the size tool adjustment to make them a straight line and ended up with weird shading errors
Title: Re: Boolean Cut
Post by: limey BSc. on October 15, 2009, 04:24:14 AM
I cant agree more when I cut out my lower lip for the shuttlebay on the V2 tiber im working on I ended up with a boatload of poly's i didnt want and I cut the thing with an amazing 10 sided cylinder stretched and it only contacted 5 of the sides lol but instead of the normal vertex amount id expect i got alot of extras, I tried collaapsing the polies with the size tool adjustment to make them a straight line and ended up with weird shading errors

When you've done the cut, select all the excess verts (while in Editable Poly) and just click remove.
Title: Re: Boolean Cut
Post by: candle_86 on October 15, 2009, 11:56:07 AM
I cant agree more when I cut out my lower lip for the shuttlebay on the V2 tiber im working on I ended up with a boatload of poly's i didnt want and I cut the thing with an amazing 10 sided cylinder stretched and it only contacted 5 of the sides lol but instead of the normal vertex amount id expect i got alot of extras, I tried collaapsing the polies with the size tool adjustment to make them a straight line and ended up with weird shading errors

When you've done the cut, select all the excess verts (while in Editable Poly) and just click remove.

ty thats gonna save me some headaches, cause i hate create poly which is how I fixed it last time, but I hate doing it that way.
Title: Re: Boolean Cut
Post by: baz1701 on October 15, 2009, 05:56:05 PM
ok here is a test I did to try and "remove" the unwanted verts. I just ended up with a square hole!
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 15, 2009, 07:13:10 PM
I would not boolean for a deflector cutout (Actually, I wouldn't use boolean for ANYTHING, but thats just me). Here's a technique I've had better luck with.

Title: Re: Boolean Cut
Post by: Raven Night on October 15, 2009, 07:27:23 PM
That is absolutely brilliant Fury. Ive been either using Boolean (hit or miss oftentimes) or just doing it manual, which is also a pain. This should work much better.
Title: Re: Boolean Cut
Post by: limey BSc. on October 15, 2009, 07:51:36 PM
I would not boolean for a deflector cutout (Actually, I wouldn't use boolean for ANYTHING, but thats just me). Here's a technique I've had better luck with.

Holy crap, you can snap to vertex?! :eek That makes things easier!
Title: Re: Boolean Cut
Post by: candle_86 on October 15, 2009, 08:06:59 PM
dude you just made my life easier ty if this works with everything i dont have to make boolean cuts anymore
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 15, 2009, 08:24:01 PM
*headdesks*

Glad you guys find that helpful....

I REALLY need to make a video tutorial or five.
Title: Re: Boolean Cut
Post by: MarkyD on October 16, 2009, 12:18:50 PM
Lol, nice tut mate.. funny that guys did not know that..  defianetly need to go into tuts section, but you may need a new post  :)
Title: Re: Boolean Cut
Post by: limey BSc. on October 16, 2009, 12:36:22 PM
Lol, nice tut mate.. funny that guys did not know that..  defianetly need to go into tuts section, but you may need a new post  :)

I'd just never considered right clicking on the snap button! I use the different snaps all the time (angle mainly), but never really explored it much.

I REALLY need to make a video tutorial or five.

At least :P I always like seeing how other people do stuff. I'm like the borg, I assimilate other peoples techniques :assimilate
Title: Re: Boolean Cut
Post by: MarkyD on October 16, 2009, 12:39:57 PM
I here what your saying mate, I only learned that technique 2 years ago, but I thought everyone knew it.. 

 :funny

there ya go... needs to go in the tuts section... well the you tube vid does  ;)

The remainder of the thread can go in the bin  :wtf

 :D
Title: Re: Boolean Cut
Post by: baz1701 on October 17, 2009, 12:47:02 PM
Great tutorial, though the hole is better still have mesh errors?

Pic shows old boolan cut and new vert cut
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 17, 2009, 12:54:51 PM
You might want to add another loop around the bottom of the hull and then connect the verts of the cutout to that instead - sort of give it some room to straighten out.

Are you sure you don't have any duplicate verts, too?
Title: Re: Boolean Cut
Post by: baz1701 on October 17, 2009, 02:03:53 PM
right took another stab at it and it is 95% better
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 17, 2009, 02:44:39 PM
If you build it really low poly, and then put a turbosmooth on it with smoothing groups intact - you can get a lot more curves into it - all you have to do is go in and remove and unneeded edge loops.
Title: Re: Boolean Cut
Post by: Phaser on October 18, 2009, 05:44:57 PM
I would not boolean for a deflector cutout (Actually, I wouldn't use boolean for ANYTHING, but thats just me). Here's a technique I've had better luck with.


Cookie for that, Furyofaseraph.  That's a huge help.  Thanks!
Title: Re: Boolean Cut
Post by: baz1701 on October 18, 2009, 05:46:32 PM
I second, third and forth that.
Title: Re: Boolean Cut
Post by: Furyofaseraph on October 18, 2009, 08:04:57 PM
Thanks guys :-)
Title: Re: Boolean Cut
Post by: candle_86 on October 21, 2009, 08:15:01 AM
gonna start using it myself, and other good news im back i just spend the last couple days in the hospital got surgery
Title: Re: Boolean Cut
Post by: candle_86 on November 17, 2009, 06:25:04 PM
hey im out of the model game, i had all my computers die, I had to buy a Pentium II with the little bit of cash i had, so don't expect anything at all from me
Title: Re: Boolean Cut
Post by: Daystar70 on November 17, 2009, 07:00:35 PM
UGh that sucks dude! listen, don't give up. I once had stockpiles of customised modeling files on a computer and was midway thru a 3-d superhero comic that was going awesome, it was gut wrenching when my click of death came, i struggled to preserve my files and did manage to preserver a good chunk of them. Over time i managed to rebuild a library on new system. It kills motivation though i totally get that. But i recommend you rebuild your resources..and then back shit up. There is nothing out there that can't be backed up in the 3-d modelling world.
Title: Re: Boolean Cut
Post by: Furyofaseraph on November 17, 2009, 07:15:22 PM
I feel your pain - I actually just nearly lost all my data on a harddrive that was going south. I already backed it all up, though.
Title: Re: Boolean Cut
Post by: candle_86 on November 17, 2009, 08:37:54 PM
it wasnt just data it was CPU, Ram and video that went.
Title: Re: Boolean Cut
Post by: Daystar70 on November 17, 2009, 09:39:37 PM
We get that dude. were just saying when u say your done modeling it doesn't require ..eh  NM. Sorry for your loss.