I would like to have particles, which fly around and if they enter a certain region a force should be added to them and I would also like to count the amount of particles, which entered a certain region.
I tried it with Particles2D and ParticlesAttractor2D, but it is not possible to count the particles with them.
So what is the most efficient way to do this? I would like it to run on mobile devices and also a little bit older ones.
Should I use Area2D and KinematicBodys or implement everything myself? If so how should I do it?