Orientations

Orientations

Orientation functions:

• vertical_unit_vector
• altitude
• latitude
• longitude
• gravitational_potential
• projection_normal
• projection_tangential

for orientations:

• NoOrientation
• FlatOrientation
• SphericalOrientation

NoOrientation

No gravitational force or potential.

FlatOrientation <: Orientation

Gravity acts in the third coordinate, and the gravitational potential is relative to coord[3] == 0.

SphericalOrientation <: Orientation

Gravity acts towards the origin (0,0,0), and the gravitational potential is relative to the surface of the planet.

sphr_to_cart_vec(orientation::SphericalOrientation, state::Vars, aux::Vars)

Projects a vector defined based on unit vectors in spherical coordinates to cartesian unit vectors.

cart_to_sphr_vec(orientation::SphericalOrientation, state::Vars, aux::Vars)

Projects a vector defined based on unit vectors in cartesian coordinates to a spherical unit vectors.