Determines if there is a plane that contains the curve
(vlax-curve-isPlanar curve-obj)
Arguments
The VLA-object to be tested.
Return Values
T if there is a plane that contains the curve; otherwise nil.
Examples
Determine if there is a plane containing the ellipse used to demonstrate vlax-curve-getArea:
_$ (vlax-curve-isPlanar ellipseObj)
T
Determine if there is a plane containing the spline used to demonstrate vlax-curve-getDistAtParam:
_$ (vlax-curve-isPeriodic splineObj)
nil
