liquidfun::box2d::particle::FIXTURE_CONTACT_LISTENER_PARTICLE

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

Call b2ContactListener when this particle is about to interact with a rigid body or stops interacting with a rigid body. This results in an expensive operation compared to using b2_fixtureContactFilterParticle to detect collisions between particles.