7.9.3.14.6. Ellipses and Ellipse segments

7.9.3.14. Tools in drawing mode 7.9.3.14.6. Ellipses and Ellipse segments
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"Ellipses" toolbar

	Note
	Only available in Drawing mode.

	Note
As of V12 Ellipses and Ellipse segments can not only be used for drawings but also for sketches. Restrictions: When exporting, ellipses and ellipse segments are concatenated from several circular arcs as approximation. Sketches with ellipse and ellipse segments do not support extrudes with Draft (although extrudes are not an official feature in V12 and so are only available in the drawing mode). Ellipses and ellipse segments are not supported by the tool Contour offset (although "Contour offset" is no official feature in V12).

Note

As of V12 Ellipses and Ellipse segments can not only be used for drawings but also for sketches.

Restrictions:

When exporting, ellipses and ellipse segments are concatenated from several circular arcs as approximation.
Sketches with ellipse and ellipse segments do not support extrudes with Draft (although extrudes are not an official feature in V12 and so are only available in the drawing mode).
Ellipses and ellipse segments are not supported by the tool Contour offset (although "Contour offset" is no official feature in V12).

Ellipse by point on main axis and hull edge point
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Center point X / Center point Y.
2. Select point on main axis: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Main axis point X / Main axis point Y.
  The ellipse's orientation results from center point and main axis point.
3. Select hull point: Define a corner point of the rectangle in which the ellipse is inscribed.
Ellipse: Definition of size via corner point of bounding box

In the docking window Edit element you can subsequently adjust the values or variables of the single parameters.

Ellipse by point on main axis, width and height
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Center point X / Center point Y.
2. Select point on main axis: Once the ellipse is created, under Edit element the point's coordinates are displayed under Main axis point X / Main axis point Y.
  The ellipse's orientation results from center point and main axis point.
3. Select size: Drag the ellipse with desired Width and Height.
Ellipse: Definition of size via width and height statement

In the docking window Edit element, you can subsequently adjust the values or variables of the single parameters.
Ellipse by main axis angle, width and height
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Center point X / Center point Y.
2. Select angle of main axis: Determine the angle between X axis and ellipse's main axis.
3. Select size: Drag the ellipse with desired Width and Height.
Ellipse: Definition of ellipse's orientation via angle

In the docking window Edit element, you can subsequently adjust the values or variables of the single parameters.
Ellipse segment by point on main axis, start- and end point
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Center point X / Center point Y.
2. Select point on main axis: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Main axis point X / Main axis point Y.
  The ellipse's orientation results from center point and main axis point.
3. Select hull point: Define a corner point of the rectangle in which the ellipse is inscribed.
4. In the docking window Choose start point you can subsequently adjust the values or variables of the single parameters.
5. Select end point: The ellipse segment ends at the intersection point of line "ellipse's center point - end point" and ellipse.
  -> The segment located counterclockwise between 4) and 5) remains.
Ellipse segment: Specification of the ellipse's dimensions via corner point of bounding box

In the docking window Edit element you can subsequently adjust the values or variables of the single parameters.
Ellipse segment by point on main axis, width, height, start- and end point
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Center point X / Center point Y.
2. Select point on main axis: Once the ellipse is created, under Edit element, the point's coordinates are displayed under Main axis point X / Main axis point Y.
  The ellipse's orientation results from center point and main axis point.
3. Select size: Drag the ellipse with desired Width and Height.
4. Choose start point: The ellipse segment starts at the intersection point of line "ellipse's center point - start point" and ellipse
5. Select end point: The ellipse segment ends at the intersection point of line "ellipse's center point - end point" and ellipse.
  -> The segment located counterclockwise between 4) and 5) remains!
Specification of the ellipse's dimensions via width and hight statement

In the docking window Edit element you can subsequently adjust the values or variables of the single parameters.

Ellipse segment by point on main axis, width, height, start- and end angle

Click on the icon and follow the instructions displayed in the status line:

Choose center point: In the dialog, the chosen point is displayed under Center point X / Center point Y.
Select point on main axis: In the dialog, the chosen point is displayed under Main axis point X / Main axis point Y.
The ellipse's orientation results from center point and main axis point.
Select size: Drag the ellipse with desired Width and Height.
Choose start point:
Select end point:
Start angle and End angle are in relation to the main axis. The angular orientation is counterclockwise as usual.

Ellipse segment: correct values in sketch

In the docking window Edit element you can subsequently adjust the values or variables of the single parameters.

Note

For ellipse segments not touching their min. and max. extension (values of major and minor axis) the real values in the sketch concerning Width / Height and Start angle / End angle are not correct due to the internal method of calculation.

Internal calculation:

A circular arc is created with the entered Start angle and End angle.
Now the circular arc is compressed/stretched in order to bring it in the form of an ellipse.
In doing so also start angle and end angle are compressed.
So the angle originally stated is not the one shown in the sketch. Also width and hight of the ellipse segment are divergent. See Fig. „Ellipse segment: divergent values in the sketch“. (The lines pointing out the angles with 45 degree are only for clarification.)

Ellipse segment: divergent values in the sketch

Ellipse segment by main axis angle, width, height, start- and end angle
Click on the icon and follow the instructions displayed in the status line:
1. Choose center point: In the dialog, the chosen point is displayed under Center point X / Center point Y.
2. Select angle of main axis: Determine the angle in relation to X axis and ellipse's main axis.
  In the dialog, the chosen angle is displayed under Angle.
3. Select size: Drag the ellipse with desired Width and Height.
4. Choose start point:
5. Select end point:
  Start angle and End angle are in relation to main axis. The angular orientation is counterclockwise as usual.
Ellipse segment: Definition of orientation via angle

In the docking window Edit element you can subsequently adjust the values or variables of the single parameters.

Note
The restriction noted under Ellipse segment by point on main axis, width, height, start- and end angle applies here in the same way. See above note.

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