Optional angleThe optional angle (in radian) of the arc of circle feature.
If not defined, then the angle is 2 * PI meaning a full
circle.
The center of the arc of circle feature.
The normal vector of the arc of circle feature.
The radius of the arc of circle feature.
Optional startThe optional start direction of the arc of circle feature.
In case angle is defined, then the startDirection MUST be defined.
The type of the feature.
The ArcOfCircleFeature interface defines an arc of circle
feature.The PickingFeatureAttachmentItem.feature may be an arc of circle
feature, a pointfeature, a linefeatureor an OOBBfeature.In this case, the
featureis an arc of circle with a center, a normal, a radius, an optional starting direction and an optional angle (in radian).See