Maya Training

Introduction to Hard Surface Modeling

Maya Training

Interiors and Furniture Vol 1 & 2 - Modeling & Cloth

Maya Training

Shading, Lighting and Rendering the Bedroom in MR

Maya Training

Robot volume one - Modeling with animation in mind

Maya Training

Spach-Alspaugh House the complete courseware

Maya Training

Burt The Cartoon Dinosaur Vol 01 - Modeling

New Maya Training

Robot Volume 02 - Hybrid Rigging
You are here > Home > SimplyMaya Community Forums
Loading

Welcome to Simply Maya

Please Sign in or Sign up for an account

Member Login

Lost your password?

Not a member yet? Sign Up!

Old 17-05-2003, 10:23 PM   #1
Nem
Subscriber
 
Nem's Avatar
 
Join Date: May 2002
Location: Faringdon, UK
Posts: 1,480
Thanks: 0
Thanked 2 Times in 2 Posts
Default Help with birail

can someone show me how to birail this particular part of a car? like CV placement etc cos i tried and it gets really really messy because this isnt a simple face like the door
__________________
- Simon

My Website: www.Glass-Prison.com
Nem is offline   Reply With Quote
Old 17-05-2003, 10:25 PM   #2
Nem
Subscriber
 
Nem's Avatar
 
Join Date: May 2002
Location: Faringdon, UK
Posts: 1,480
Thanks: 0
Thanked 2 Times in 2 Posts
Default

and heres the image
__________________
- Simon

My Website: www.Glass-Prison.com
Nem is offline   Reply With Quote
Old 19-05-2003, 04:02 PM   #3
bernhard
Registered User
 
Join Date: Feb 2003
Location: Austria - St. Pölten
Posts: 93
Thanks: 0
Thanked 0 Times in 0 Posts
Lightbulb hello friend

hello nem !

well, I´m working on the same like you do.
I´m still trieng to model a simply part from a car, a vehicle or an airplane, or something else.

And I use the technique with EP Curves, and than Birail 1,2 or 3.

I will contact you with the MSN.
Maybe we can talk about that - I have some ways how you can use the birail option.

bye for now,
bernhard
bernhard is offline   Reply With Quote
Old 19-05-2003, 04:18 PM   #4
NitroLiq
Moderator
 
NitroLiq's Avatar
 
Join Date: Nov 2002
Location: New York
Posts: 2,133
Thanks: 0
Thanked 10 Times in 9 Posts
Default

It might be nice to post your solutions here as well so others can benefit from your knowledge.
__________________
"Terminat Bora Diem, Terminal Auctor opus."
NitroLiq is offline   Reply With Quote
Old 20-05-2003, 02:03 AM   #5
mtmckinley
The Maya Mountain
 
mtmckinley's Avatar
 
Join Date: Aug 2002
Location: Seattle, WA
Posts: 8,245
Thanks: 1
Thanked 25 Times in 25 Posts
Default

first, make sure the curves that are opposing each other (left and right, top and bottom) match each other's spans.

(also, when dealing with a 2 profile, 2 rail birail, you can get the same result with a Boundary.)

For a Birail 2 (having 2 profiles), make sure the ends of the 4 curves are all point snapped to each other. If the ends are not touching, it won't work.

Select the birail 2 tool. Select the to profiles, THEN select the 2 rails.

Should work.

The boundary function creates a practically identical surface. Like the birail, the ends have to be snapped together and you get better results if the opposing curves match spans. Then, simply select them in clockwise or counter clockwise order, and surfaces > boundary.
__________________
-Mike
www.mtmckinley.net
The Maya Toolbelt
mtmckinley is offline   Reply With Quote
Old 20-05-2003, 10:35 AM   #6
bernhard
Registered User
 
Join Date: Feb 2003
Location: Austria - St. Pölten
Posts: 93
Thanks: 0
Thanked 0 Times in 0 Posts
Exclamation my english is really bad

hello !

well, sorry for my bad english. I´m experimenting and I used the wrong vocabulary - so, I don´t really have a solution , cause I have many problems to model an objekt with that technique.

I only want to tell, that I am testing this tool, and well, I can´t really good explain - so I thought I will contact via MSN.

lol; sorry, but a good tip:
there is a wonderful gnomon video showing you that technique. I think it is Modelling III - the GTR car.

bernhard
bernhard is offline   Reply With Quote
Old 20-05-2003, 02:36 PM   #7
bernhard
Registered User
 
Join Date: Feb 2003
Location: Austria - St. Pölten
Posts: 93
Thanks: 0
Thanked 0 Times in 0 Posts
Unhappy Birail problem - really hard problem ?

Hello Nem, Hello Mike !

Well, I´ve tested it and build up the EV-Curves I could see from the car.

The problem seems to bee, that there are more than only 3 profiles. Okay, so I thought it shouldn´t bee no problem to use birail 3+ - well, but I have no clue, why the birail doesn´t take effect ?


here is the PLE-Version file to download:
http://www.tophunter.at/3dproblems/b...problem_nem.mp

I´ve tried 2 variants:
1st: selected the left ep curve, than the right one -->enter
than I´ve selected the rest


2nd: selected the upper line at first, than the lowest-->enter
than I´ve selected the rest

hmm, grrrr - no surface was built

mike, what do I wrong ?

thx,
bernhard
bernhard is offline   Reply With Quote
Old 20-05-2003, 03:41 PM   #8
Nem
Subscriber
 
Nem's Avatar
 
Join Date: May 2002
Location: Faringdon, UK
Posts: 1,480
Thanks: 0
Thanked 2 Times in 2 Posts
Default

well this is what i get with birail 2
Attached Thumbnails
 
__________________
- Simon

My Website: www.Glass-Prison.com
Nem is offline   Reply With Quote
Old 20-05-2003, 04:20 PM   #9
adldesigner
Registered User
 
adldesigner's Avatar
 
Join Date: Sep 2002
Location: CCS, Venezuela
Posts: 3,363
Thanks: 0
Thanked 9 Times in 9 Posts
Default

Could you post a wireframe?
__________________
adldesigner
Caracas, Venezuela
Hell .. not gone perse, but with a certainly lower post count per day.

adldesigner is offline   Reply With Quote
Old 20-05-2003, 06:17 PM   #10
Nem
Subscriber
 
Nem's Avatar
 
Join Date: May 2002
Location: Faringdon, UK
Posts: 1,480
Thanks: 0
Thanked 2 Times in 2 Posts
Default

here ya go
Attached Thumbnails
 
__________________
- Simon

My Website: www.Glass-Prison.com
Nem is offline   Reply With Quote
Old 20-05-2003, 10:02 PM   #11
mtmckinley
The Maya Mountain
 
mtmckinley's Avatar
 
Join Date: Aug 2002
Location: Seattle, WA
Posts: 8,245
Thanks: 1
Thanked 25 Times in 25 Posts
Default

looks like you just need to arrange your curves a bit. The 4th point on one curve will try to match the 4th point on the opposite curve (for example).
__________________
-Mike
www.mtmckinley.net
The Maya Toolbelt
mtmckinley is offline   Reply With Quote
Old 20-05-2003, 10:29 PM   #12
Nem
Subscriber
 
Nem's Avatar
 
Join Date: May 2002
Location: Faringdon, UK
Posts: 1,480
Thanks: 0
Thanked 2 Times in 2 Posts
Default

how many CVs would you recommend i use? cos it seems to get heavy no matter how many i use
__________________
- Simon

My Website: www.Glass-Prison.com
Nem is offline   Reply With Quote
Old 20-05-2003, 10:48 PM   #13
adldesigner
Registered User
 
adldesigner's Avatar
 
Join Date: Sep 2002
Location: CCS, Venezuela
Posts: 3,363
Thanks: 0
Thanked 9 Times in 9 Posts
Default

Why don´t you try making some curves on that same surface NEM?
You could actually try a loft on some rather refined curves on surface. Might help you out. Then you discard this one.
__________________
adldesigner
Caracas, Venezuela
Hell .. not gone perse, but with a certainly lower post count per day.

adldesigner is offline   Reply With Quote
Old 21-05-2003, 09:46 AM   #14
bernhard
Registered User
 
Join Date: Feb 2003
Location: Austria - St. Pölten
Posts: 93
Thanks: 0
Thanked 0 Times in 0 Posts
Default I´ve learned...--> impossible to work as birail ?

Hello friends !

Below you can see the exisiting ep-curves from Nem´s image - and only with that curves it wasn´t possible for me to use the biral 3+ tool.

So I added again a new ep-curve and used birail 2.
than it worked, but the result I´ve got, are 2 surfaces.

Q1. Isn´t it possible to use the birail 3+ tool on the existing ep-curves from Nem you can see on this image ?



Q2: How I can weld (connect) two nurbs-surfaces fluidly ?
Hmm, I mean, is it really necessary to connect different surfaces togehther, to avoid such problems you can see on the first mesh image from Nem ?


thx for helping friends,
bernhard
bernhard is offline   Reply With Quote
Old 21-05-2003, 01:52 PM   #15
adldesigner
Registered User
 
adldesigner's Avatar
 
Join Date: Sep 2002
Location: CCS, Venezuela
Posts: 3,363
Thanks: 0
Thanked 9 Times in 9 Posts
Default

**UPDATED May 24th**

What you guys should strive for before trying to go for a NURBS car, is understand first how the curves work, familiarize with the surface tools, make some tests along and generally get a feel for NURBS modelling before attempting a complex surface as this one.

That said, let me give you some pointers on NURBS modelling which might come in handy:
  • Opossing Curves should always have the same spans.
    To change spans on a Curve, use the Rebuild Curve Action.
  • Opossing Curves should always have the same direction.
    To change direction on a Curve, use the Reverse Direction Action in the Curves Menu.
  • When picking try to follow either a clockwise, or a counter-clockwise pattern. Don´t go picking them on a random order, I just use curves surface direction for this.

The Birail tools are not meant to be used as flat surface generator, but instead are to be used to create surfaces in which you want to control the location of generated isoparms.
To use them effectively, you should keep the preceding points in mind, remember to have them connected, and know when to use the Enter key.
  • Birail1 makes use of three curves (One profile and two rails). It creates a surface that pretty much starts at the profile, and finishes at the end of the rails. To use it: Start the tool, pick the profile, then pick the rails.
  • Birail2 makes use of four curves (Two profiles and two rails). It creates a surface that sweeps from the first profile to the second along the rail ones. To use it: Start the tool, pick the two profiles, then pick the two rails.
  • Birail3+ makes use of as much curves as you specify (Three+ profiles and two rails). It creates a surface that sweeps from the first profile through all the profiles you pick along the rail ones. To use it: Start the tool, pick the first profile, then the second till you´ve picked all your profiles, press ENTER, and then pick the two rails.

For the surfaces you guys are attempting to make, I´d really use the Boundary tool instead. Remember Nurbs are 4-sided patches, and as such 4-curves represent the ideal way to construct them. If you take those pointers -and the ones above- in mind you won´t have much trouble working with the Boundary tool.

Again, I stress, work first with some surfaces, twist them, play with directions, rebuild them, change spans .. before attempting more complex surfaces and all. Believe me, you don´t want to see stitching in badly constructed surfaces.

As per your image bernhard, I´d say that does not qualify for a Birail operation, you´ll only get a poorly constructed surface. Build a four sided one, and just Boundary it together.
To stitch them together is a whole other business, however it takes the same exact pointers in mind.

Hope this helps guys.
__________________
adldesigner
Caracas, Venezuela
Hell .. not gone perse, but with a certainly lower post count per day.


Last edited by adldesigner : 24-05-2003 at 11:25 AM.
adldesigner is offline   Reply With Quote

A little bit about who we are
Links you might find useful
Catch up with SimplyMaya
SimplyMaya specialises in Maya tutorials. We offer over 1,000 individual Maya training videos, ranging from basic Maya tutorials through to intermediate Maya tutorials. Our tutorials are created by instructors with industry experience and are designed to get you up and running in Maya quickly without making it seem like hard work.

Copyright © 1999-2015 SimplyMaya - vBulletin® Copyright © 2000-2015, Jelsoft Enterprises Ltd.