check if using float32 and smaller ints helps

add a test for single bouncing ball with different values of restitution coefficient

add the possibility to let particles enter/leave the domain by adding/removing them from the list of particles

add verlet time-stepping and see if it helps using larger time-steps

Add a test for adding/removing particles

add circular domain and tilted rectangle to make a silo

generate domains form factory

wrap collision model in class

improve the estimate of tangential displacement

rename these coefficients

re-run dam break

add rolling movement

how to handle particles of different restitution coefficients ?
is v the relative speed of particles ?

add balls interactions

re-add numba

make a silo test case

create functions in utils to create initial distributions of spheres

check how and why the coulomb model should be incorporated

remove the pre-computation of the ge parameter to make it compatible with other collision models

investigate tangential elasticity

fix plotting in function of domain type

becareful with normal and tangent vectors passed in collision, they must be oriented from 0 to 1 or 1 to 0 (see how it works with domain collision)

fix slow vstack for history

gravity should be defined by the applications

write a force computation such that particle/particle and domain/particle are handled the same ?

add yaml file for github actions testing