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Draws a semicircle, or 180 degree arc, between two points.
Point 1: Beginning of the semicircle
Point 2: Endpoint of the semicircle
Point 3: Orientation of the semicircle (optional 3D Mode only)
There are two choices for the format of the arc:
If you select Draw as a Line, the arc will be drawn as line segments that follow the shape of an arc. Otherwise the arc will be stored as an actual arc. You should normally use the arc format because it is more efficient and precise. You can use the line format if you need to distort the arc by scaling or stretching.
A semicircle will be drawn counterclockwise from the first point to the second point.
N Segments: When saved as a plane or line, this is the number of segments, into which the object will be divided.