using to_cost values in shooting* algorithm

[siarhei]

I think that to_cost value can be spent time on passing through the edges. So as to restrictions if to_cost value is positive (as in documentation it can be traffic light ) it can take part in calculating shortest path( with to_cost values added to cost values of edges involved in restriction).

But if to_cost value is negative (-1) then restriction turn must not appear in shortest path result

[anton]

Actualy, 'to_cost' (just like 'cost') can be anything - length, time, price etc.

And we decided that if 'to_cost' value is negative, this edge is unpassable.