Modifying ellipses and elliptical arcs directly

Tool(s): Ellipse

You can directly modify all the parameters relevant to the geometry of ellipses and design entities derived therefrom, such as start and end points or arc length of an elliptical arc, position and size of the ellipse, position and length of the radii, rise and so on.

There are two decisive factors:

• The handle you use after you have selected a circle or an arc,

  and

• The subsequent setting on the context toolbar.

Using a point handle

To directly modify the arc length or included angle of an elliptical arc

• You have selected an elliptical arc.

1. Click one of the point handles.
2. Select Change end angle on the context toolbar.
3. Click to specify the new length of the elliptical arc.

Note: Of course, you can still modify the arc length and the start and/or end angle by entering values directly in the data entry boxes. What's new in Allplan 2014-1 is that you can switch between degrees and radians when specifying the arc length.

To directly modify the position and size of an elliptical arc

• You have selected an elliptical arc.

1. Click one of the point handles.
2. Select Free circle modification on the context toolbar.
3. Click to specify the new position and size of the elliptical arc.

Using a geometry handle

To directly modify the radius of an ellipse or elliptical arc

• You have selected an ellipse or elliptical arc.

1. Click the geometry handle of the radius you want to change.
2. Only available for elliptical arcs:
   Select Change radius on the context toolbar.
3. Click to specify the new size of the ellipse or elliptical arc.

Note: Of course, you can modify the radii as usual by entering values directly in the data entry boxes.

To enlarge or reduce an elliptical arc proportionally

• You have selected an elliptical arc.

1. Click one of the geometry handles.
2. Select Fillet on the context toolbar.
3. Click to specify the new position and size of the elliptical arc.