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Ellipse command

Command: EL ELLIPSE

Prompts Under EL command are explained below:
  • Specify axis endpoint of ellipse : It will specify the first end point on the axis of ellipse.
  • Specify other endpoint of axis : It will specify the second end point on the axis of ellipse. distance between first end point and second end point becomes the length of that axis.
  • Specify distance to other axis : It will specify end point on other axis. This will specify end point from the center of ellipse. So, the length of axis will be twice the distance between center point of ellipse and end point specified.
  • Arc: This will start to form an elliptical arc.
    • Promts under Arc are as follows
      • Specify start angle: You can enter numeric value from where elliptical arc starts or click the known point from where arc starts. This will consider the start point or first point which you specified as endpoint as 0 degree and will increment along anticlokwise direction.
        • Prompt Under Start angle:
          • Parameter: It will ask for a numeric value of angle to start the arc. parameter converts the angle in cartesian co-ordinates by taking x and y co-ordinate of center of ellipse. calculation goes as follows:                                                                        Major axis co-ordinate for the start point of ellipse=major axis co-ordinate of center + Vector of major* cos(specified angle) and minor axis co-ordinate for the start point of ellipse=minor axis co-ordinate of center + vector of minor axis* sin(specified angle).
      • Specify end angle: You can enter numeric value from where elliptical arc ends or click the known point from where arc ends. This will consider the start point or first point which you specified as endpoint as 0 degree and will increment along anticlokwise direction.
      • Included angle: You can enter numeric value for angle for elliptical arc. This will consider the right end of your elliptical arc as 0 degree and will increment in anticlockwise direction. This dosent depend on which point you specify first.
  • Rotation: This will ask for a numeric value of angle and will create an ellipse with ratio of major axis to minor axis as cos of the specified angle.
  • Center: This will specify the center point of your ellipse.

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