ELLIPSE command

Creates an ellipse or elliptical arc.

Icon:

Alias: EL

Description

Create an ellipse or elliptical arc from a combination of options including the center, axis endpoints, axis radius, rotation angle, and included angle.
  1. Center
  2. First end of ellipse axis
  3. Second end of ellipse axis
  4. End of other axis
  5. Major axis
  6. Minor axis

Methods to create an ellipse

This command has 3 methods to begin creating an ellipse:

  • First end of ellipse axis
  • Arc
  • Center

If the PELLIPSE variable is set to 1, the Arc option is not available.

First end of ellipse axis
Begin creating an ellipse by specifying a point on the ellipse’s first axis then:
Second end of axis
Specify the end point of the ellipse’s first axis.
Set other axis
Specify the radius of the other axis.
Additional option: [Rotation]
Arc
Begin creating an elliptical arc by specifying a point on the ellipse’s first axis then:
Additional options: [Center]
Second end of axis
Specify the end point of the ellipse’s first axis.
Set other axis
Specify the radius of the other axis.
Additional options: [Rotation]
Set start angle of arc
Specify the start angle to define the arc’s starting point. The angle is measured counter-clockwise from the positive x-axis.
Additional option: [Parameter]
End angle
Specify the end angle to define the arc’s endpoint.
Additional options: [Parameter/Included angle]
  1. Start angle
  2. End angle
  3. Included angle
Center
Begin creating an ellipse by specifying its center point then:
Endpoint of axis
Specify an endpoint of the ellipse’s first axis, measured from the center.
Set other axis
Specify an endpoint of the other axis, measured from the center.
Additional option: [Rotation]

Additional options within the ELLIPSE command

After you begin creating an ellipse, the following options may be available:

Included angle
Specify the included angle, measured from the starting point.
Parameter
Specify values for the parametric formula that defines the elliptical arc:
p(b) = c + a * cos(u ) = b * sin(u )

where:

  • a = major axis.
  • b = minor axis.
  • c = center of the ellipse.
  • u = point along the arc.
Rotation
Specify the angle of the ellipse around the major axis. The angle can vary between 0 and 89.9. An angle of 0 degrees draws a circle. An angle of 89.9 degrees draws a very thin ellipse.