AcDbCircle Constructor

Overload List
Method 
Description 
Default constructor. Initializes the center to (0,0,0), the radius to 0.0, and the normal to (0,0,1). The radius needs to be set to a value greater than 0.0 before the object is first closed. All coordinates are WCS.
 
Initializes the circle with the arguments cntr, nrm, and radius.
Both center and normal must be in WCS coordinates. normal must be nonzero length and radius must be greater than zero.