static void EstimateCrushing(cpBody body, cpArbiter arb, ref CrushingContext context)
{
cpVect j = arb.TotalImpulse();
context.magnitudeSum += (float)cpVect.cpvlength(j);
context.vectorSum = cpVect.cpvadd(context.vectorSum, j);
}
public void ScaleIterator(cpBody body, cpArbiter arb, ref cpVect sum)
{
sum = cpVect.cpvadd(sum, arb.TotalImpulse());
}