D add_val(D v, D t) // only works if t>=tmax, i.e. deltas/vals come in increasing order
{
assert(t>=tmax);
add_delta(v-x, t);
}
double add_val(double v,double t)
{
add_delta(v-x,t);
}
D add_delta(delta const& d)
{
add_delta(d.d, d.t);
}
double add_delta(double d,double t)
{
add_delta(delta(d,t));
}
