liquidfun::box2d::particle::PARTICLE_CONTACT_LISTENER_PARTICLE

pub const PARTICLE_CONTACT_LISTENER_PARTICLE: ParticleFlags = $ BitFlags {
bits : $ value }

Call b2ContactListener when this particle is about to interact with another particle or stops interacting with another particle. This results in an expensive operation compared to using b2_particleContactFilterParticle to detect collisions between particles.