Calculate ellipse polygon coordinates from foci and eccentricity.
get_ellipse(f1 = c(-3, -2), f2 = c(3, 2), ecc = 0.8, n = 100)
| f1 | x- and y-coordinates of the first focus. |
|---|---|
| f2 | x- and y-coordinates of the first focus. |
| ecc | eccentricity of the ellipse, defined as half the distance between foci divided by the semi-major axis. We can say \(e = sqrt{1 - b^2/a^2}\), where \(e\) is the eccentricity, \(a\) is the length of the semi-major axis, and \(b\) is the length of the semi-minor axis. Eccentricity ranges between 0 (perfect circle) and 1 (straight line between foci). |
| n | number of points in polygon. |