Nurbs Cube faces?

# 1 07-10-2004 , 02:40 PM

Registered User
Join Date: May 2004

Location: New York City

Posts: 42

Why do Nurbs cubes' faces act as seperate objects when in either object or component mode?

Quote

# 2 07-10-2004 , 02:48 PM

Subscriber
Join Date: Jun 2002

Location: England

Posts: 168

Basically any Nurbs shape like the sphere is basically a plane just rapped around to make a shape like a sphere

Cant remember why there like that they just are!!

*note
I could be wrong

Quote

# 3 07-10-2004 , 03:05 PM

Registered User
Join Date: May 2004

Location: New York City

Posts: 42

The Nurbs cube is the only Nurbs shape that has seperated faces.

Does a Polygon cube work with bump maps the same way a Nurbs cube does?

Quote

# 4 07-10-2004 , 03:20 PM

Subscriber
Join Date: Jun 2002

Location: England

Posts: 168

I've got a book at home that explains all about nurbs, I'll have to read it again to tell you why there like that.

Not sure about the bumpmaps?

Quote

# 5 07-10-2004 , 03:32 PM

The Maya Mountain
Join Date: Aug 2002

Location: Seattle, WA

Posts: 8,245

A nurbs object is only mathematically capable of having 4 sides (although fairly unstable 3-sided nurbs objects are also possible), therefore, a true Nurbs cube is only possible (that I've found anyway) by taking a Nurbs sphere and manipulating it to be cube-ish in shape (ie. see image).

Add more isoparms at the edgs to get sharper geometry.

No, polygons have different setups then Nurbs when it comes to texture coordinates (UVs). The positive thing, though, is you can manipulate a polygon's UVs however you want, while a nurbs' object's UVs are pretty much stuck where they are.

Attached Thumbnails

Click image for larger version

Name: cube.jpg
Views: 521
Size: 6.6 KB
ID: 17798

-Mike
The Maya Toolbelt

Quote

# 6 07-10-2004 , 05:05 PM

Registered User
Join Date: May 2004

Location: New York City

Posts: 42

Thanks mtmckinley, is there a way to weld all the sides together so they can be selected as one object in object mode, possibly an attribute setting?

Quote

# 7 07-10-2004 , 05:21 PM

Registered User
Join Date: Jul 2003

Location: Surrey BC

Posts: 160

you can group all the sides together although they might already be like that by default. select one side of the cube in object mode and hit the up arrow on your keyboard. if it doesn't work then go to the group option and try it again after.

Quote

# 8 07-10-2004 , 05:25 PM

Moderator
Join Date: Nov 2002

Location: New York

Posts: 2,133

Or even easier....draw a c-shaped profile curve (the c-shape shouldnt curve but done with stright lines) for the cube and revolve 360 degrees, also linear, and 4 spans (think it's spans...im not in front of maya at the moment)...voila...instant cube.

"Terminat Bora Diem, Terminal Auctor opus."

Quote