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View Full Version : making holes in a smoothed mesh


snot_nose
02-17-2003, 10:00 PM
ok, i know this topic was discussed several times over here but i still don't have any idea what to do,

right now i'm trying to make some holes in the a zippo lighter that i'm creating.

i tried with booleans even that everybody say not to.
but the problem that i got with them wasn't that i got a lot of extra vertices (this ones i welded in a few minutes)
but that i got a messed up topology (lots of poles and tris) and i'm sure that it's the same with shape merge.
so did any1 found some technic for that?
is the only way is to delete all the polys around and to create them again in quads?

check out what i mean on the pic below

snot_nose
02-17-2003, 10:12 PM
and this is what i got
some of the polys i deleted here and some of them were already created by me

but you get the idea...

cdinic
02-17-2003, 11:58 PM
make that entire plane sepratley. I mean draw a rectangle, then circles where u need them, convert to editable spline, attach the circles. Then extrude like 10 units or somthing... convert to an editable poly, delete everythign but the nice clean front face with your holes in it. Zoom in supper close, line it up real carefuly with your zippo mesh. then attach it. now weld the 4 corner verts together, they should be aligned almost perfectly before your weld.

leme know how it works out!

-Chris:buttrock:

Stroker
02-18-2003, 02:01 AM
In situations like that, I prefer to give each circle it's own rectangle on the plane. If you look at it at 45 degrees, you should see a grid pattern for making the holes.

This also looks like a good exercise in Nurbs.
Make the base shape and surface it.
Make a circle and project onto the surface.
Make COS and Trim.
Do it a few few times, then surface the inside of the holes.

The resuling mesh from Nurbs might be kinda weird, though. Have to do a lot of playing with the surface properties or surface approximation or something.

gnarlycranium
02-18-2003, 03:34 AM
That mesh IS pretty screwed up looking, but with a cleaner workflow and a bit of care you can probably fix it up. As long as things are more or less even, you're alright. It's a mechanical object, I'm guessing the surface won't be doing much in the way of flexing and the like, so as long as the surface is coherent don't worry about it too much.

It may very well be something to do in NURBS... but that depends on what app you have.

gaggle
02-18-2003, 09:01 AM
There's that Powerbooleans over at npoweredsoftware.com too, I don't have much experience with it (all of three minute with the demo), this just.. somehow seems like something that program would enjoy chewing on.

Note though, that baring some devine code that drives Powerbooleans, you'll generally end up with a not-so-clean result when booleaning.

snot_nose
02-18-2003, 03:38 PM
cdnic: i tried this technic and it makes grate circles but the topology still look bad.
my problem is not with making circles but making circles to an object with meshsmooth applied.
maybe i should have posted my question the sub-d thread.
i also tried to project the circles on a nurb surface and then applied meshsmooth.
the topology was really wierd but the meshsmooth was ok, i guess because everything was still made of quads.
i have bad memories from nurbs because it was the first modelling method that i tried in nurbs, but i guess i finally found what it is good for :D

anyway what i did now was a different technic, i think the results are ok but all my circles are not very accurate, but i guess i'm satisfied with that
so what i did was:
applied tesselation, then applied "inset selected polygons" for both sides of my mesh and then i chose the rectangles on each side and applied connect selected polys for making the holes.

you can see the result in the picture

snot_nose
02-18-2003, 03:46 PM
and here is the wire frame
any comments other than the holes are welcomed too.

Giant
02-18-2003, 05:30 PM
I have the same problem at the moment. I have a belt with mesh smooth and I want to put holes in the leather...for the belt grooves.

I got the same problem...I tried a boolean, then tried a shape merge. With mesh smooth on, the results look well...smoothed. Perhaps this can be done with smoothing groups..hmmm..just thinking out loud.

I have never used NURBS and have only heard horrible stories about Max' NURBS...

will keep checking this post, want to know if someone comes up with a solution!

peace

Giant

Maven
02-18-2003, 06:34 PM
I know you have thought of this but...depending on how the model is going to be used, why not map the holes?

Giant
02-18-2003, 06:43 PM
I think that is what I am going to do. I am sure they will produce a good result!

thanx anyways... :)

Giant

snot_nose
02-18-2003, 07:12 PM
giant
something like this? ;)

snot_nose
02-18-2003, 07:14 PM
forgot something:

Giant
02-18-2003, 09:02 PM
Yeah man-

That actually looks pretty good. How did you make that...

obviously you have Meshsmooth on, but did you just Boolean it?

cool... :)

Giant

snot_nose
02-18-2003, 09:28 PM
well, it's the same technic i eventually applied for my zippo.
took me just couple of minutes.

first i started with a box divided with some segments then turned it to edit poly then i selected all the polys in the front and back row and used the inset selected polys tool that is located in the mesh tools (you could also use the extrude and bevel tools but this one is better)
then i selected each of the polygons that suppose to be the holes in the front and the back of the back together and then applied the connect selected polys for making the holes.
u need to select each front and back poly seperatly and they have to be parallel for creating the holes if you want to use the connect polys tool.

after i got the holes i applied a bend modifier and then i applied meshsmooth with iteration of 3 wich made my squars into circles

and there is not a single boolean

hope i make sense and if not, here is a pic:

Giant
02-18-2003, 09:53 PM
Makes perfect sense...will give it a shot..
Thanx :)


Giant

Martijn Wijmer
02-19-2003, 07:20 AM
Seems like no one paid any attention to gaggle
's comment. Pretty dumb, cause that's the answer to your problems.

jadedchron
02-19-2003, 08:24 AM
i tried gaggle's comment on my butt rash, but it just didn't cure it:annoyed: . :D

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