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

In retistruct: Retinal Reconstruction Program

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.

Author(s)

David Sterratt

retistruct documentation built on June 8, 2025, 10:31 a.m.