Node: Ellipse Data Members, Next: Ellipse Constructors and Setting Functions, Previous: Ellipse Reference, Up: Ellipse Reference
| Point focus0 | Protected variables |
| Point focus1 |
The foci of the Ellipse. They are located on the major axis of
the Ellipse at a distance of linear_eccentricity from
center, on opposite sides of the minor axis.
|
| real linear_eccentricity | Protected variable |
The linear eccentricity of the Ellipse e, such that
e = \sqrta^2 - b^2,
where a and b are half the lengths of the major
and minor axes, respectively. Let h stand for axis_h and v
for axis_v. If h>v, then a = h/2 and b = v/2. If v>h,
then a =v/2 and b = h/2. If h = v, then the Ellipse is
circular (but not an object of type Circle!), and a = b = v/2 = h/2.
The linear eccentricity is the distance along the major axis of the
|
| real numerical_eccentricity | Protected variable |
The numerical eccentricity \epsilon of the Ellipse,
such
that \epsilon = e/a < 1, where e is the linear eccentricity of the
Ellipse, and a is half the length of the major axis of the
Ellipse.
|
| real axis_h | Protected variables |
| real axis_v |
The horizontal and vertical axes, respectively, of the Ellipse.
Actually, they are only or vertical
horizontal by convention, since there are no restrictions on the
orientation of an |
| unsigned short DEFAULT_NUMBER_OF_POINTS | Protected static variable |
The number of Points on an Ellipse, unless another number
is specified when an Ellipse constructor is invoked.
|