circleOnTheUnitSphere {TrajectoryGeometry} | R Documentation

## Circle on the unit sphere

### Description

Find a circle on the unit 2-sphere

### Usage

    circleOnTheUnitSphere(center, radius, N = 36)

### Arguments

`center` | - The center of the circle.
`radius` | - The radius of the circle.
`N` | - The number of segments to approximate the circle. It defaults to 36.

### Details

Given a point on the unit 2-sphere and a radius given as a spherical distance, this finds the circle.

It's not clear to me this should be exported, but it's handy to do this for testing and debugging.

### Value

This returns an approximation to the the circle as a N+1 x 3 matrix

### Examples

    pole = c(1,0,0)
    radius = pi / 4
    circle = circleOnTheUnitSphere(pole,radius)

[Package TrajectoryGeometry version 1.0.0 Index]