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);
}
}
}
public override void remove(Location here, Location to)
{
if (here == to)
{
return;
}
Direction d = here.getDirectionTo(to);
while (true)
{
BridgeRail brr = RailRoad.get(here) as BridgeRail;
if (brr != null && brr.hasRail(d))
{
// destroy it
brr.voxel.railRoad = null;
// TODO: delete piers
BridgePierVoxel.teardownBridgeSupport(here, TrafficVoxel.get(here));
}
if (here == to)
{
return;
}
here = here.toward(to);
}
}
/// <summary>
/// Obtains a reference to the RailRoadImpl of the specified index.
/// </summary>
private RailRoadImpl getRailRoad(int idx)
{
Location loc = location;
loc.x += direction.offsetX * idx;
loc.y += direction.offsetY * idx;
return((RailRoadImpl)RailRoad.get(loc));
}
/// <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);
}
public override void invalidateVoxel()
{
if (sOrW == null || !(RailRoad.get(this.location + sOrW) is TunnelRail))
{
World.world.onVoxelUpdated(this.location);
}
// otherwise no need to update the voxel since a train will be hidden by this tunnel
}
/// <summary>
/// Gets the SlopeRailRoad object of the specified location, if any.
/// Otherwise null.
/// </summary>
public static new SlopeRailRoad get(Location loc)
{
RailRoad rr = RailRoad.get(loc);
if (rr is SlopeRailRoad)
{
return((SlopeRailRoad)rr);
}
else
{
return(null);
}
}
public override void build(Location here, Location to)
{
Debug.Assert(canBeBuilt(here, to));
Direction d = here.getDirectionTo(to);
bool building = false;
bool pier = true;
while (true)
{
if (RailRoad.get(here) == null)
{
TrafficVoxel v = TrafficVoxel.getOrCreate(here);
if (!building)
{
building = true;
create(v, d, BridgeRailMode.Begin);
}
else
{
create(v, d,
(here == to || RailRoad.get(here + d) != null)
? BridgeRailMode.End : BridgeRailMode.Middle);
}
if (pier)
{
BridgePierVoxel.electBridgeSupport(here,
d.isParallelToX ? typeof(PierTop1Impl) : typeof(PierTop2Impl),
d.isParallelToX ? typeof(PierBody1Impl) : typeof(PierBody2Impl), v);
}
pier = !pier;
}
else
{
building = false;
}
if (here == to)
{
return;
}
here = here.toward(to);
}
}
public override void remove(Location here, Location to)
{
if (here == to)
{
return;
}
Direction d = here.getDirectionTo(to);
for ( ; here != to; here = here.toward(to))
{
TunnelRail trr = RailRoad.get(here) as TunnelRail;
if (trr != null && trr.hasRail(d))
{
trr.remove(); // destroy it
}
}
}
/// <summary>
/// Compute the cost of destructing a slope rail.
/// </summary>
/// <returns>If a destruction is impossible, return 0</returns>
public static int calcCostOfTearDownSlope(Location loc, Direction dir)
{
// make sure the first voxel is not occupied by a car
if (Car.get(loc) != null)
{
return(0);
}
// the 2nd block has a distinctive zangle and zdiff. check it.
loc += dir;
RailRoad rr = RailRoad.get(loc);
if (!(rr is SlopeRailRoad))
{
return(0);
}
SlopeRailRoad srr = (SlopeRailRoad)rr;
if (!(srr.pattern.zangle == dir && srr.pattern.zdiff == 1))
{
return(0);
}
// make sure the 2nd rail is not occupied by a car
if (Car.get(loc) != null)
{
return(0);
}
// check 3rd and 4th rails.
loc += dir;
loc.z++;
if (Car.get(loc) != null)
{
return(0);
}
loc += dir;
if (Car.get(loc) != null)
{
return(0);
}
return(SLOPE_DESTRUCTION_UNIT_COST * Math.Max(1, loc.z - World.world.waterLevel));
}
public override void build(Location here, Location to)
{
Debug.Assert(canBeBuilt(here, to));
Direction d = here.getDirectionTo(to);
while (true)
{
if (RailRoad.get(here) == null)
{
TrafficVoxel tv = TrafficVoxel.getOrCreate(here);
new RailImpl(tv, d);
BridgePierVoxel.electBridgeSupport(here, tv);
}
if (here == to)
{
return;
}
here = here.toward(to);
}
}
public override void build(Location here, Location to)
{
Debug.Assert(canBeBuilt(here, to));
Direction d = here.getDirectionTo(to);
while (true)
{
if (RailRoad.get(here) == null)
{
MountainVoxel mv = World.world[here] as MountainVoxel;
if (mv != null)
{
// build a tunnel
byte[] heights = new byte[4];
for (int i = 0; i < 4; i++)
{
heights[i] = (byte)mv.getHeight(Direction.get(i * 2 + 1));
}
World.world.remove(here); // remove this mountain
create(TrafficVoxel.getOrCreate(here), d, heights);
}
else
{
// build a normal tunnel
new SingleRailRoad(TrafficVoxel.getOrCreate(here), RailPattern.get(d, d.opposite));
}
}
if (here == to)
{
return;
}
here = here.toward(to);
}
}
public static new RailRoadImpl get(Location loc)
{
return(RailRoad.get(loc) as RailRoadImpl);
}
public override void draw(DrawContext dc, Point pt)
{
Surface display = dc.surface;
pt.Y -= 9; // offset
CarState.Inside s = state.asInside();
Debug.Assert(s != null);
RailRoad rr = s.voxel.railRoad;
if (rr is SlopeRailRoad) // slope rail
{
SlopeRailRoad srr = (SlopeRailRoad)rr;
switch (srr.level) // apply slope height
{
case 0: break;
case 1: pt.Y -= 4; break;
case 2: pt.Y += 8; break;
case 3: pt.Y += 4; break;
}
if (!parent.isReversed)
{
type.drawSlope(display, pt, s.direction, s.direction == srr.climbDir);
}
else
{
type.drawSlope(display, pt, s.direction.opposite, s.direction != srr.climbDir);
}
}
else // level rail road
{
int d1 = s.direction.index;
int d2 = s.voxel.railRoad.guide().index;
int angle;
if (d1 == d2)
{
angle = d1 * 2;
}
else
{
int diff = (d2 - d1) & 7;
if (diff == 7)
{
diff = -1;
}
int dd = (d2 * 2 + diff * 3) & 15; // operation is on modulo 16.
if (2 < dd && dd < 10)
{
pt.X += 3;
}
else
{
pt.X -= 3;
}
if (6 < dd && dd <= 14)
{
pt.Y += 2;
}
else
{
pt.Y -= 2;
}
angle = (d1 * 2 + diff) & 15;
}
if (parent.isReversed)
{
angle ^= 8;
}
type.draw(display, pt, angle);
}
}
/// <summary>
/// Returns true if a train car can proceed to the
/// specified location by going the specified direction
/// </summary>
private static bool isConnected(Location loc, Direction d)
{
RailRoad rr = RailRoad.get(loc);
return(rr != null && rr.hasRail(d.opposite));
}
public static new JunctionRailRoad get(Location loc)
{
return(RailRoad.get(loc) as JunctionRailRoad);
}