C is an N-by-2 matrix in millimetres, one ellipse per row; zero rows append nothing. A, B and ROT are each one value for every ellipse or a vector of one per row.

ROT turns the first axis away from horizontal, in degrees counter-clockwise, and defaults to zero.

An ellipse is what a circle becomes when a round feature is seen obliquely, which is most of the time on an isometric or an auxiliary view, and what a chamfer on a cylinder projects to.

See also: draw.Drawing.circle, draw.Drawing.arc, draw.Drawing.polyline

Source Code: draw.Drawing