Function lerp

lerp(
    out: spherical.Spherical,
    a: spherical.Spherical,
    b: spherical.Spherical,
    t: number,
): spherical.Spherical
Linearly interpolates between two Spherical coordinates taking the shortest angular path for theta and phi.
Parameters
- out: spherical.Spherical
  the receiving Spherical
- a: spherical.Spherical
  the first operand
- b: spherical.Spherical
  the second operand
- t: number
  interpolation factor in [0, 1]
Returns spherical.Spherical
out
- Defined in core/spherical.ts:114