Ellipse in AutoCADThe Ellipse is defined as a curve surrounding two focal points. The shape of the ellipse is determined by two of its axis, which defines the length and width. The Ellipse is a general command to create ellipse on the AutoCAD display. We can create the ellipse by specifying the twopoint on an axis and the endpoint on another axis. The first axis and the second axis of the Ellipse can be determined either as minor or major axis, depending on the specification. The icon of Ellipse will look like the below image: Move the pointer of your mouse on the Ellipse icon to view the dialogue box for Ellipse in AutoCAD. It will look like the given image: It consists of the dropdown list, which includes other options such as Elliptical Arc, Center, and Axis. The list will look like the given image: Let's discuss each type of Ellipse in detail. CenterIn this method, the first axis is determined by the center point and endpoint, while the second axis is determined by the length. We can either determine the point or distance value to create such ellipse. Let's understand with an example. The steps are listed below:
If the vertical axis was chosen as the first axis, the ellipse so formed is shown in the below image: Axis, EndThe Ellipse is formed by defining the three points similar to above. It is shown below: The location and length of the first axis is specified by the points 1 and 2, while the distance between the center and the endpoint of the second axis is specified by the point 3. Elliptical ArcThe Elliptical Arc command is used to create an elliptical arc. For example: Consider the below image: The location and length of the first axis is specified by the points 1 and 2, while the distance between the center and the endpoint of the second axis is specified by the point 3. The fourth and fifth specified points are the start and end angles. Let's understand with an example: The steps are listed below:
We can also specify the Parameter angle instead of the normal angle. ParameterIt creates the arc using the following vector equation for the specified angle values: p(angle) = c + a * cos(angle) + b* sin(angle) Where, a and b = negative lengths of the major and minor axis c = center of the ellipse
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