Module: QuadSphere

Defined in:

lib/quad_sphere.rb,
lib/quad_sphere/csc.rb,
lib/quad_sphere/tangential.rb

Overview

Please mind: in this documentation, and in the code comments, we use φ (phi) to denote longitude, or azimuthal angle, and θ (theta) for latitude, or elevation. This is the convention commonly used in physics. We apologise to all mathheads out there for any inconvenience this may cause.

Defined Under Namespace

Modules: CSC, Tangential

Constant Summary

TOP_FACE =

The identifier of the cube face whose centre maps to θ=π/2 (90°N, the North Pole).

0

FRONT_FACE =

The identifier of the cube face whose centre maps to φ=0, θ=0 (0° 0°, think Ghana).

1

EAST_FACE =

The identifier of the cube face whose centre maps to φ=π/2, θ=0 (0° 90°E, think India).

2

BACK_FACE =

The identifier of the cube face whose centre maps to φ=π, θ=0 (0° 180°, think Fiji).

3

WEST_FACE =

The identifier of the cube face whose centre maps to φ=-π/2, θ=0 (0° 90°W, think Central America).

4

BOTTOM_FACE =

The identifier of the cube face whose centre maps to θ=-π/2 (90°S, the South Pole).

5