View Full Version : Smoothing one tube into another

01-07-2004, 01:09 PM
Working on a trumpet model. On the actual trumpet I have (from high school band days), the tubes don't just jut into each other, there's a small "blend" or fillet between them. I have no idea how to do this in LightWave.

I can create a flange on the end of one tube but how do I get it to conform to the shape of the tube it's going into?

In Maya and other 3D programs they have a function to smoothly blend between 2 objects, but I don't recall anything like that in lightwave.

Any suggestions?

01-07-2004, 01:27 PM
Did you try using the Boolean function.

01-07-2004, 02:57 PM
Hey, thanks for the suggestion, but that's not what I need (I love the boolean function (when it works), but what I need is a flanged-end pipe smoothly blending into another pipe that is perpendicular. Here's a diagram side view of what I'm trying to do


CMP 2003
01-07-2004, 03:23 PM
isnt there some type of plugin to smooth things into others like that, i cant remember what its called but it does that, (blending pipes into others)

I'll try to find it

01-07-2004, 04:26 PM
There is a plugin called Rounder that is very nice..


But you can also model it by hand if you dont want to have to buy a plugin.

I did an example of what you were wanting to do, the steps I took to accomplish this are as follows.....

1) boolean of the two pipes together
2) choose one of the pipes
3) Bandsaw.. 3 cuts towards the side you want the radius.

( Note: when you make the three cuts with bandsaw, make them so that the points are a little farther apart than you would like so that it is easy to pick each row individually.)

4) Pick a set of points.
5) move them to where you want them.
6) use the stretch tool to expand the points to you desired size.
7) repeat 4-6 until done.

Seems like alot but actually goes pretty quick once you do it once.
I hope this helps.I included an example model of the technique I did so that you can view and assertain whether or not this technique is what you were looking for.

01-07-2004, 04:55 PM
oops.. didnt explain step #2 right....

2) choose the pipe that you want the fillet to extend from. :)

yeah,like you would'nt have figured that out anyway...
Oh well ,it is all in the details.
have fun

01-07-2004, 06:40 PM
Work with 8 sided tubes, make 3 cuts in the cross section of one tube and then you should have enough points to weld the open end of the other tube into place. Sorry it would be better with pictures.

01-07-2004, 06:46 PM
Like this picture?
See more in this thread:

I could let you know if none of these suggestions help. I was going to make a mini tutorial on achieving I result like I have in this picture if people would be interested.

01-07-2004, 07:44 PM
Hey cool bike frame, nice work.

01-08-2004, 05:06 AM
I think it's fair to say that for those without Rounder and such, this would be a useful tutorial to have.

01-08-2004, 08:25 AM
Yes, a nice step by step tute with pix would be great. I tried the above submitted semi-step by step and couldn't get results like those shown.


01-08-2004, 09:42 PM
I will do a little tutorial with pics and explanation showing how I did my tubes, but I will not get to it until this weekend.

01-13-2004, 09:35 AM
So, does ANYONE ELSE have a step by step tutorial for this? Or can people who have already posted steps, expand on them a bit. Just glancing at the forum list for the past few days, this one has had quite a few views and several replies, while most have 3 or 4 replies, which says to me, this is something people want to know how to do!


01-13-2004, 09:55 AM
Okay, I'm getting closer, but it still took too long. Here's a shot. If I try to Sub-Patch it to smooth it, I get weird tears in the geometry, so I just cranked up smoothing in the Surface Editor.


01-14-2004, 10:52 AM
I had a go, trying to keep polys to a minimum (36 poly each).

01-15-2004, 02:57 AM
here's an image

01-15-2004, 02:58 AM
and a wire