Count the number of particles in foregin cells that have tasks only. Allocated memory based on that counter. Link the cells recursively based on that counter.

Use the same naming convention for the hydro sort activation function and the star sort activation function.

Correctly update the counters when adding a spart to the global array. Handle the case where we run out of free slots.

Correctly link the newly created star to the ddestroyed gpart. Can survive time integration for a few steps. Crashes at next rebuild still.

Matthieu Schaller authored Nov 08, 2018 and Matthieu Schaller committed Nov 10, 2018

More uniform way of looping over pairs of top-level cells for the proxy construction, gravity pairs construction and hydro pairs construction.

Replace the absolute depth criterion for gravity tasks with a relative criterion based on the local depth of the tree.