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The foci of the
Ellipse. They are located on the major axis of theEllipseat a distance oflinear_eccentricityfromcenter, on opposite sides of the minor axis.
The linear eccentricity of the
Ellipsee, 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 foraxis_hand v foraxis_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 theEllipseis circular (but not an object of typeCircle!), and a = b = v/2 = h/2.The linear eccentricity is the distance along the major axis of the
Ellipsefromcentertofocus0andfocus1.
The numerical eccentricity \epsilon of the
Ellipse, such that \epsilon = e/a < 1, where e is the linear eccentricity of theEllipse, and a is half the length of the major axis of theEllipse.