Description Usage Arguments Details Value Author(s) References See Also Examples
Rotate a point on the unit 2-sphere.
1 | Rotate.inv(pt1, pt2)
|
pt1 |
spatial location. |
pt2 |
spatial location. |
This function rotates pt2
to the extent that the spherical coordinate (0, 90) is rotated to pt1
.
The function is the inverse of the Rotate
function, and returns a point as a form of three-dimensional Euclidean coordinate.
three-dimensional vector.
Jongmin Lee
https://en.wikipedia.org/wiki/Rodrigues_rotation_formula
1 2 3 4 5 | ## If "pt1" is north pole (= (0, 90)), Rotate.inv() returns Euclidean coordinate of "pt2".
# It returns Euclidean coordinate of spatial location (-100, 80).
Rotate.inv(c(0, 90), c(-100, 80))
# It converts spatial coordinate (-100, 80) to Euclidean coordinate.
Trans.Euclid(c(-100, 80))
|
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