Create Bezier Surfaces in AutoCAD 2006

[osw201]

Hi there,

I'm struggling a bit with 3D surfaces, specifically Bezier surfaces. I need to create a Bezier surface in Autocad (2006). Whilst I understand the theory and maths behind Bezier curves I can't find any help for actually making a simple Bezier surface/patch (16 points).

At the moment the best I can come up with is just inputting a 4x4 3D mesh, setting the SURFTYPE to Bezier (8) and inputting the points which can't be right?? Any help much appreciated.

[jaberwok]

If you set SURFTYPE after creating the mesh, it probably isn't working (I'm not sure, I haven't don't this for a while). Have you tried the "Smooth Surface" option of the PEDIT command?

[osw201]

Well you see I have to give a detailed example of the use of Bezier technique to define a simple curved surface.

Just setting SURFTYPE to 8 and adding the 16 data points doesn't seem what was intended. Is there any other way of creating a Bezier surface, maybe using the defining equations or something?

Thanks

[jaberwok]

Perhaps a coon's patch ? Uses EDGESURF.
This uses four curves, each of which could be a Bezier curve. I don't have a clue what you might call the resultant surface.