Autodesk AUTOCAD 2006, Справочник по командам, Страница: 464 / 1490

2
Parameter
Requires the same input as Start Angle, but creates the elliptical arc using
the following parametric vector equation:
p(u) = c + a* cos(u) + b* sin(u)
where c is the center of the ellipse and a and b are its major and minor axes,
respectively.
Specify start parameter or [Angle]: Specify a point, enter a value, or enter a
Specify end parameter or [Angle/Included angle]: Specify a point, enter a value,
or enter an option
■
End Parameter: Defines the end angle of the elliptical arc by using a
parametric vector equation. The Start Parameter option toggles from
Angle mode to Parameter mode. The mode controls how the ellipse is
calculated.
■
Angle: Defines the end angle of the elliptical arc. The Angle option toggles
from Parameter mode to Angle mode. The mode controls how the ellipse
is calculated.
■
Included Angle: Defines an included angle beginning at the start angle.
Center
Creates the ellipse by a center point you specify.
Specify center of ellipse: Specify a point (1)
Specify endpoint of axis: Specify a point (2)
Specify distance to other axis or [Rotation]: Specify a distance by entering a value
or locating a point (3), or enter r
3
1
2
440 | Chapter 7