@spec mod(number()) :: float()

An angle brought into 0 up to 360 degrees.

@spec of({number(), number(), number()}) :: {float(), float(), float()}

The {pitch, yaw, 0} of direction vector in whole degrees, pitch above zero looking up.

@spec vectoangles(
  {number(), number(), number()},
  {number(), number(), number()} | nil,
  {number(), number()}
) :: {float(), float(), float()}

The {pitch, yaw, roll} of direction forward, as FTE's vectoangles gives them (VectorAngles): fractions of a degree kept, each angle 0 up to 360. The roll comes from up when one is given, else it is 0; with no horizontal part the yaw comes from up, or is 0. Pitch is scaled by mesh_pitch and roll by mesh_roll (the values of r_meshpitch and r_meshroll, 1 or -1).

QuakeServer.Angles.vectoangles({1.0, 0.36, 0.0}, nil, {-1.0, 1.0})
#=> {0.0, 19.798876354524932, 0.0}

@spec vectors({number(), number(), number()}) :: {tuple(), tuple(), tuple()}

The forward, right and up directions of angles, as FTE's AngleVectors gives them.

@spec yaw({number(), number(), number()}) :: float()

The yaw of direction {x, y, _} in whole degrees (the fraction cut off), 0 up to 360, as FTE's vectoyaw and Half-Life's VEC_TO_YAW give it.