public object onInside(CarState.Inside state)
{
TrainCar head = owner.head;
RailRoad rr = RailRoad.get(state.location);
Direction go = rr.guide(); // angle to go
Location newLoc = state.location + go;
newLoc.z += rr.zdiff(state.direction);
if (World.world.isBorderOfWorld(newLoc))
{
// go outside the world
return(new CarState.Outside(newLoc, go, OUTSIDE_COUNTER_INITIAL_VALUE));
}
else
{
if (isConnected(newLoc, go))
{
// the rail needs to be connected
return(new CarState.Inside(newLoc, go));
}
else
{
return(null);
}
}
}
/// <summary> Place a train to the specified location.</summary>
/// <returns> false if it can't be done. </returns>
public bool place(Location loc)
{
Debug.Assert(!isPlaced);
Direction[] ds = new Direction[length];
Location[] locs = new Location[length];
int idx = length;
Direction d = null;
do
{
idx--;
RailRoad rr = RailRoad.get(loc);
if (rr == null || rr.voxel.isOccupied)
{
// can't be placed here
return(false);
}
if (d == null)
{
d = rr.dir1; // set the initial direction
}
ds[idx] = d; locs[idx] = loc;
// determine the next voxel
cars[0].place(loc, d);
d = rr.guide();
loc += d;
cars[0].remove();
} while(idx != 0);
// make sure we are not forming cycles
for (int i = 0; i < length - 1; i++)
{
for (int j = i + 1; j < length; j++)
{
if (locs[i] == locs[j])
{
return(false); // can't be placed
}
}
}
// can be placed. place all
for (int i = 0; i < length; i++)
{
cars[i].place(locs[i], ds[i]);
}
stopCallCount = 0;
registerTimer();
state = State.Moving;
return(true);
}
