Reconsider Kernel signature for Parcels v4 #2147
Description
In Parcels v3, a Kernel has the function signature
def v3Kernel(particle, fieldset, time)However, as we’re working on vectorized kernels (#2122), the particle is actually a list of particles (a subset of the ParticleSet); so could perhaps better be renamed to particles.
Furthermore, the time does not mean very much anymore, because different particles can ‘live’ at different times. So better to drop it?
I thus propose to use the v4 release for a (breaking) API change to the Kernel signature, to
def v4Kernel(particles, fieldset)