Checker abstract class
abstract class Checker {
bool collideParticleParticle(Particles psA, int iA, Particles psB, int iB, Vector4 acol);
bool collideParticleSegment(Particles psA, int iA, Segment s, Vector4 scol);
}
Subclasses
Checker_MvtAsPoly4, Checker_Noop, Checker_ParticleMvt0, Checker_T1