3D arc/elipse

[Danskur]

Is there any way to make a circle or ellipse between coordinates that are not parallel in UCS.

I'm using autodesk map 2005 but have also accsess to Autocad 2005 and ADT 2005 if that helps.

 

[lpseifert]

Are you asking if it's possible to create a circle that is not parallel to the plane of the current UCS? I don't think so, you'll have to create a new UCS and then create the circle.

 

[Danskur]

Hi Ipseifert

The problem is that I have 4 coordinates wich is not in parallel (measured with total station on site) and it is not quite a circle, more like ellipse.

So how do I draw an oval (circle/arc like) line in 3D, or between these 4 points that i've taken from the total station.

 

[TerryScan]

One way to do this is to approximate the arc with chord segments using a 3d polyline. Some 3rd party software reduces survey data in this maner.

I did a quick Google search for 3d poly lisp routines. It appears 3dutil.cip at

http://www.cadresource.com/library/lisp0a.html

may be what you are looking for.

 

[IFRs]

you can use the points to make a new ucs, then use the points to create a 3 point circle.