Ellipse
System variable PELLIPSE controls the type of newly created ellipses.
The variable value PELLIPSE = 0 creates a true ellipse.
The variable value PELLIPSE = 1 creates a 2D polyline representation of ellipse from arc segments.
Ellipse by Semi-axes
Ribbon: Home, Draw – Draw > 
By Semi-axes
Menu: Draw – Ellipse By > 
Semi-axes
Toolbar: Draw – Р
Command line: ELLIPSE1
The command creates an ellipse by center and radiuses.
Command options:
| Rotation | Relation between ellipse axes by rotation around first axis. |
|---|
Command prompts:
| Specify center point for ellipse: | Specify center point for ellipse (point 1) |
|---|---|
| Specify endpoint of axis: | Specify first radius (point 2). |
| Specify distance to other axis or [Rotation]: | Specify second radius (point 3). |
Ellipse by axis and semi-axis
Ribbon: Home, Draw – Draw > 
By Axis and Semi-axis
Menu: Draw – Ellipse By >
Axis and Semi-axis
Toolbar: *Draw*–
Command line: ELLIPSE2, ELLIPSEBYDIAMETER
The command creates an ellipse by axis and semi-axis.
Command options:
| Rotation | Relation between ellipse axes by rotation around first axis. |
|---|
Command prompts:
| Specify axis endpoint of ellipse: | Specify point 1. |
|---|---|
| Specify other axis endpoint of ellipse: | Specify diameter of ellipse (point 2). |
| Specify distance to other axis or [Rotation]: | Specify radius of ellipse (point 3). |
Elliptic Arc
Ribbon: Home, Draw – Draw > 
Elliptical Arc
Menu: Draw – Ellipse By > 
Elliptic Arc
Toolbar: Draw –
Command line: ELLIPTICARC
Command options:
| Center | Center of elliptic arc. |
|---|---|
| Rotation | Relation between ellipse axes by rotation around the first axis |
| Parameter | Select Parameter when specifying the start and end points of the elliptic arc to create an elliptic arc according to the parameter vector: p(u) = c + a* cos(u) + b* sin(u), where
|
| Inner angle | Inner angle of the elliptic arc; specified relative to the origin angle. |
| Angle | Switch to the arc creation mode by specified angles. |
Command prompts:
| Specify axis endpoint of elliptical arc or [Center]: | Specify point 1. |
|---|---|
| Specify other axis endpoint of elliptical arc: | Specify length of ellipse axis (point 2). |
| Specify distance to other axis or [Rotation]: | Specify length of another axis (point 3). |
| Specify start angle or [Parameter]: | Specify start angle (point 4). |
| Specify end angle or [Parameter/Inner angle]: | Specify end angle (point 5). |
Creation of ellipses and elliptic arcs with one command
Command line: EL, ELLIPSE
Universal command allows you to create ellipses by center, minor and major axes, and create elliptic arcs.
Command options:
| Arc | Switches to the mode of elliptic arc creation. |
|---|---|
| Center | Center of ellipse. |
| Rotation | Creation of ellipse by rotating a circle about the first axis. |
Command options of the creation of elliptic arc mode:
| Center | Center of elliptic arc. |
|---|---|
| Rotation | Relation between ellipse axes by rotation around the first axis. |
| Parameter | Select Parameter when specifying the start and end points of the elliptic arc to create an elliptic arc according to the parameter vector: p(u) = c + a* cos(u) + b* sin(u), where
|
| Inner angle | Inner angle of the elliptic arc; specified relative to the origin angle. |
| Angle | Switch to the arc creation mode by specified angles. |
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