Arc Attributes

The database models elliptical arcs with two bounding boxes; the outer bounding box defines the ellipse and the inner bounding box selects the portion of the ellipse that is the arc. The major and minor axes of the ellipse are parallel to the x and y axes. Once created, an arc can be modified by specifying the starting and stopping angle (in radians) of the arc.

The sweep of the arc begins at startAngle and proceeds counterclockwise until it ends at stopAngle. The sweep must be no more than pi (180 degrees). arc~>bBox defines the bounding box of just the arc, whereas arc~>ellipseBBox defines the bounding box of the entire ellipse that has the arc as a piece of it.

Related Topics

Generic Shape Attributes