Fillet

A fillet can be applied to a VRTX using

FRADIUS value

Any value can be supplied in the syntax. A positive value corresponds to a convex fillet radius at the VRTX, a negative value to a concave fillet. Setting FRAD to 0 is equivalent to setting it to OFF. If the fillet radius is set on a VRTX then the spans on either side of it are drawn straight, for example, the BULG attribute of the current and next VRTX are ignored.

See also Fillet Objects with Arc Radius at Draw>Add and Modify Drawing Objects>Modify Drawing Objects>Fillet Objects.