static bool preSolve(cpArbiter arb, cpSpace space, object o)
{
cpShape a, b;
arb.GetShapes(out a, out b);
OneWayPlatform platform = (OneWayPlatform)a.userData; // (OneWayPlatform*)cpShapeGetUserData(a);
if (cpVect.cpvdot(arb.GetNormal(), platform.n) < 0)
{
arb.Ignore(); // cpArbiterIgnore(arb);
return(false);
}
return(true);
}
