Taper a square to a circle shape

[hockley91]

How would I model a square shape extruded to a circle shape?

 

I ended up using a box and and edited the mesh to shape into a circle. It's for some ductwork that I was modeling.

 

You know the old adage fitting a square peg in a round hole? Only this is shaping a square to a hole...

 

Would nurbs be the best solution?

[edub]

I guess the tools depend on which software you use?

 

I would try a loft nurbs, if available to you.

[SandmanNinja]

Loft will do it, with 2 shape splines

1) make a spline for your path

2) make a spline for your shape #1 (circle)

3) make a spline for your shape #2 (square)

4) select the path

5) click on shape #1 and add it to 0%

6) change the percentage to 100%

7) add shape #2 at 100%

8) it will do the transformation for you

 

Hope this helps

[beestee]

Another approach is to use the CrossSection and Surface modifiers. The order that you attach the shapes in before appling the modifiers is very important with this method, but the rest is nearly automatic. I say nearly because depending on certain scenarios you may have to adjust the settings, and in extreme scale conditions the loft method works much better.

[William Alexander]

Simple and sweet basic polygonal modeling

 

Create a circle with 24 sides

Create a square with 6 divisions on each side for 24 edges around trhe perimeter (must match circle sides-edges)

select the outside edges and bridge

Flip normals if needed

Extrude inset bevel/extend the original round and sqaure

Bridge the new inside circle face and square outside edges - if needed

 

Takes about 30 secs to create the basic geometry and bridge- 3Dmax, C4D, Modo .......

 

A few more quick edge bevels and extrude/shifts a fairly decent looking duct transition

Edited July 31, 2009 by wda

[hockley91]

Those are plenty of solutions to this! Thanks a lot everyone for your input. I guess it's not a common situation so there isn't a quick too to modify something like that. I don't really ever use that tea kettle.

 

Great help from you all! I appreciate it!

 

Adam

[chithanh119]

Thanks for your nice tips