Draws an ellipse by defining its focal points and a point on the perimeter.
How to use
1. Click the Focal Point Ellipse icon or choose the Tools > Curves > Ellipse > Ellipse: focuses, point command.
2. The program console prompts Focus #1.
3. Place the first focal point either by clicking and dragging in any view (release the mouse button to confirm placement) or by typing its XYZ coordinates in the console. Values must be separated by a comma, i.e. 1,2,3, and confirmed by pressing Enter.
4. Repeat step 3 at the Focus #2 console prompt placing the second focal point.
5. The program console prompts Point.
6. Define a perimeter point either by clicking and dragging in any view or by typing its XYZ coordinates in the console.
You can insert points in any view regardless of where you have started.
To interactively define the ellipse, hold the mouse button down after the click or click while pressing Shift.
Options
Focus #1
Focus #2
To modify XYZ coordinates of the focal points.
Views. Choose the Edit mode. Click the point whose position you want to modify and drag it. Release the mouse button when you reach the desired position.
Modeling Tool panel. Type the new values in the XYZ data fields and confirm them by pressing Enter.
Point
To modify XYZ coordinates of the perimeter point.
Views. Choose the Edit mode. Click the point and drag it. Release the mouse button when you have reached the desired position.
Modeling Tool panel. Type the new values in the XYZ data fields and confirm them by pressing Enter.
Start angle
To change sweep of the arc.
Views. Choose the Edit mode. Click the Start point hotSpot and drag it. Release the mouse button when you reach the desired angle.
Modeling Tool panel. Set the value either by moving the slider or by typing it in the data field and pressing Enter. The value can range from 0 to 360 degrees.
End angle
To change sweep of the arc.
Views. Choose the Edit mode. Click the End point hotSpot and drag it until you reach the desired angle.
Modeling Tool panel. Set the value either by moving the slider or by typing it in the data field and pressing Enter. The value can range from 0 to 360 degrees.
Arc type
To specify whether the circle must be weighted (exact) or non-weighted (approximated).
Modeling Tool panel. Switch the chosen radio button on. You have the following options: Weighted and Non-weighted. If you choose the first option the number of control points is automatically defined. With the second option you can set the number of control points in the section below.
Note: in general, you could use Weighted if you do not plan to modify the original shape and Non-weighted if you want to edit it.
Points
To determine the number of control points of the circle in case you have chosen Non-weighted as the arc type.
Modeling Tool panel. Set the value either by moving the slider or by typing it in the data field and pressing Enter (remember: the more the control points, the more approximated the circle).
The Modeling Tool panel also displays XYZ coordinates of the Center of the ellipse and the length of Half Axis #1 and Half Axis #2. These are not directly modifiable.
See also: