void OnParticleTrigger() { // get the particles which matched the trigger conditions this frame int numEnter = ps.GetTriggerParticles(ParticleSystemTriggerEventType.Enter, enter); int numExit = ps.GetTriggerParticles(ParticleSystemTriggerEventType.Exit, exit); if (numEnter > 0) { player.BulletHit(damage); } }