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retistruct (version 0.6.3)

sphere.cart.to.sphere.dualwedge: Convert from Cartesian to ‘dual-wedge’ coordinates

Description

Convert points in 3D cartesian space to locations of points on sphere in ‘dual-wedge’ coordinates (fx, fy). Wedges are defined by planes inclined at angle running through a line between poles on the rim above the x axis or the y-axis. fx and fy are the fractional distances along the circle defined by the intersection of this plane and the curtailed sphere.

Usage

sphere.cart.to.sphere.dualwedge(P, phi0, R = 1)

Arguments

P

locations of points on sphere as N-by-3 matrix with labelled columns X, Y and Z

phi0

rim angle as colatitude

R

radius of sphere

Value

2-column Matrix of ‘wedge’ coordinates of points on sphere. Column names are phi and lambda.