Arc discretisation in sections

[bjornhgr]

Hi,

I'm using "horizontal section" to make plan drawings of 3D circular columns in an xref-ed drawing. In the x-ref the columns exist as 3D solids made from extruded circles.

Regardless of my VIEWRES setting, the resulting 2D circle discretisation is way too coarse and is presented as a polygon on my drawings.

The same applies to solids made in the same drawing, by the way, so I don't think the xref-ing has anything to do with it. Is there a to adjust this for sections?

BMan

[dbroad]

Set AECFACETDEV to a smaller value.  It will always facet, though.

[bjornhgr]

Thanks, that seems to work. However, as this is an absolute distance, the error gets relatively larger as the radius of the arc gets smaller. Even when giving a really small value for FACETDEV and a large value for FACETMAX, it seems the smallest distance is set to 0.01 which is a bit to large for me as my drawing unit is meters.

Shouldn't I be able to make the deviation "as small as I'd like" by fiddling with those two variables?

[dbroad]

I don't know why they decided to implement the arcs as faceted shapes.  I think it was a bad decision.  That said, other than not having a center point snap, its not usually a big deal.  I've never done a job with a meter unit though.  Can't you use millimeter units and dimension in meters?  That seems like a relatively simple workaround.  It does seem the lower limit of AECFACETDEV should  be smaller for a meter based drawing though.

[David_W_Koch]

The value of FACETDEV has to be greater than 0, but is not limited to a minimum value of 0.01.  Your units may be set to DISPLAY two decimal places, but you can ENTER smaller values and AutoCAD Architecture will accept them.  The smallest number that you can enter and verify it has been set is 0.00000001, provided you maximize the precision of the linear units to eight decimal places.