The Start Parameter option toggles from Angle mode to Parameter mode. End Parameter: Defines the end angle of the elliptical arc by using a parametric vector equation.Where c is the center of the ellipse and a and b are the negative lengths of its major and minor axes, respectively. P(angle) = c + a * cos(angle) + b * sin(angle) Requires angular input, but creates the elliptical arc using the following parametric vector equation for the angle of each endpoint:
The Start Angle option also changes Parameter mode to Angle mode. Multiples of these angle values result in a mirrored effect every 90 degrees.ĭefines the first endpoint of the elliptical arc. Values between 89.4 degrees and 90.6 degrees are invalid because the ellipse would otherwise appear as a straight line. The higher the value from 0 through 89.4 degrees, the greater the ratio of minor to major axis. The fourth and fifth points are the start and end angles.ĭefines the start point of the first axis.ĭefines the major to minor axis ratio of the ellipse by rotating a circle about the first axis. The third point determines the distance between the center of the elliptical arc and the endpoint of the second axis. The first two points of the elliptical arc determine the location and length of the first axis. The first axis can define either the major or the minor axis depending on its size. The angle of the first axis determines the angle of the elliptical arc.