best method to make a 5 sided surface

[seb4d]

Hi,
I don't know nurbs very well but I think nurbs surfaces are made of 4 sides only, no less no more.

[Kabab]

By sides i really mean edges you can have 3 sided surfaces and the help says you can have 5 sided but i can never get it to work :(

[MasonDoran]

need a picture for this one....the boundry tool is used for those hard to manage corners with only 3 isoparms

[stunndman]

i had the same problem with my car - after experimenting a little i decided to simply add another profile curve which split my previous five sided surface into a four sided and three sided surface - i wanted to use the square tool to have tangency so that was the best solution for my problem

[anthonymcgrath]

yeah, would like to see a pic myself. any chance you could upload one? depends on the curvature if there is any.

[Kabab]

I will post a picture on monday basiclly one section is the wheel arch.

I can work it with a trim but once you trim a surface it's useless :hmm:

[Kabab]

here are some pic's

http://www.concentric.com.au/5sides.jpg
http://www.concentric.com.au/5sides2.jpg

[luminis]

I would strongly suggest that you split one of the longer curves, and then make out of that two pieces of four sides. Something like this:

http://www.luminis3d.com/etc/cgt/img/5sides.jpg

[Boolieman]

Use a nurb plane and make it a 2*1 and then as needed to make the curve just add it if you need it.

[Kabab]

Originally posted by Boolieman
Use a nurb plane and make it a 2*1 and then as needed to make the curve just add it if you need it.
I'm not sure what you ment by this can you explain it further thanks :)

luminis: i'll try your sugestion.

[luminis]

Originally posted by Boolieman
Use a nurb plane and make it a 2*1 and then as needed to make the curve just add it if you need it.

I think that what Boolieman meant is to make the whole bottom edge a single edge of a square (what I highlited as yellow). But this would not work because there's a corner that needs to be completely sharp (the one in green) and this can not be done in nurbs while keeping a good parameterization.

http://www.luminis3d.com/etc/cgt/img/5sides2.jpg

[Kabab]

Originally posted by luminis
I think that what Boolieman meant is to make the whole bottom edge a single edge of a square (what I highlited as yellow). But this would not work because there's a corner that needs to be completely sharp (the one in green) and this can not be done in nurbs while keeping a good parameterization.

http://www.luminis3d.com/etc/cgt/img/5sides2.jpg
Yeah i tried that to start with put the hard edge gave me a crease through my surface.. I've done your method and it works well.

[MasonDoran]

why not model the whole fender using 1 surface...then project and trim wheel well? Its simpler and easier...

In this situation...use the square tool...its perfect for getting the tangency that you need for this

[Kabab]

I'm trying to model this without triming just testing my self :)

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.