private Move(TurnPlan owner, RelativeDirection direction, TileVector destination, int energyCost)
{
Owner = owner;
Direction = direction;
Destination = destination;
EnergyCost = energyCost;
}
/// <summary>
/// Construct a Move which represents a unit staying completely stationary.
/// </summary>
/// <param name="owner">the TurnPlan which created this move</param>
/// <returns></returns>
public static Move Halt(TurnPlan owner)
{
return(new Move(owner, RelativeDirection.Forward, owner.Unit.Position, 0));
}
/// <summary>
/// Construct a Move which represents a unit turning in place.
/// </summary>
/// <param name="owner">the TurnPlan which created this move</param>
/// <param name="direction">the RelativeDirection for it to turn to</param>
/// <returns></returns>
public static Move Turn(TurnPlan owner, RelativeDirection direction)
{
var cost = direction == RelativeDirection.Forward ? 0 : 1;
return(new Move(owner, direction, owner.Unit.Position, cost));
}
/// <summary>
/// Constructe a Move which represents a turn followed by a single tile step.
/// </summary>
/// <param name="owner">the TurnPlan which created this move</param>
/// <param name="direction">the RelativeDirection for it to turn and move in</param>
/// <returns></returns>
public static Move Step(TurnPlan owner, RelativeDirection direction)
{
var destination = owner.Unit.Position + owner.Unit.Turn(direction);
return(new Move(owner, direction, destination, 2));
}
/// <summary>
/// Simulate the game for a single turn.
/// </summary>
public void DoTurn()
{
var activeUnits = new Dictionary <Unit, TurnPlan>();
foreach (var unit in _units)
{
unit.Reset();
activeUnits.Add(unit, unit.GetMovementPlan(_world));
}
#if DEBUG
DebugLogFrame();
#endif
while (activeUnits.Count > 0) // main loop: iterate through each simulation frame
{
// STEP 1: COMBAT DETERMINATION
var pendingCombat = new HashSet <Combat>(); // stops duplication of the same combat
var unitsInCombat = new HashSet <Unit>();
foreach (var unit in activeUnits.Keys)
{
foreach (var adj in unit.Position.Adjacent().Select(pos => _world[pos])) // for each adjacent Hex
{
if (adj == null)
{
continue;
}
var neighbour = adj.Occupant;
if (neighbour != null && neighbour.Owner != unit.Owner)
{
pendingCombat.Add(new Combat(unit, neighbour));
unitsInCombat.Add(unit);
unitsInCombat.Add(neighbour);
}
}
}
// STEP 2: COMBAT RESOLUTION
var pendingCombatSorted = new List <Combat>(pendingCombat);
pendingCombatSorted.Sort(Combat.PriorityComparer); // sort by priortiy
foreach (var combat in pendingCombatSorted)
{
var unit1 = combat.Unit1;
var unit2 = combat.Unit2;
if (!unit1.IsDead() && !unit2.IsDead())
{
combat.Apply();
FinaliseCombat(unit1, unit2, activeUnits); // lambda/local-function would be
FinaliseCombat(unit2, unit1, activeUnits); // ideal here! outdated version of C#
}
}
// STEP 3: MOVE PRE-PROCESSING
var moveDestinations = new Dictionary <TileVector, List <MoveResolver> >(); // where units want to move to
var moveOrigins = new Dictionary <TileVector, MoveResolver>(); // where units are moving from
foreach (var unit in _units) // collect all units' moves into the Dictionaries, using plans
{
TurnPlan plan = null;
if (activeUnits.ContainsKey(unit)) // only active units can make moves - bind a plan
{
plan = activeUnits[unit];
if (!plan.IsActive()) // unit can no longer make moves, so remove from active units
{
activeUnits.Remove(unit);
plan = null; // unbind plan for this frame
}
}
var canMove = plan != null && !unitsInCombat.Contains(plan.Unit);
var move = canMove? plan.GetNextMove() : null;
var mayVacate = canMove && move.IsStep();
// if move is a step, moves here are conditional upon it. otherwise, deny outright
var resolver = mayVacate ? MoveResolver.Of(move) : MoveResolver.Deny();
moveOrigins.Add(unit.Position, resolver);
if (mayVacate) // add resolver to the move's intended destination for processing later
{
var hex = _world[move.Destination];
if (hex != null && !hex.Impassable) // if target is valid
{
List <MoveResolver> movesToDestination;
if (moveDestinations.ContainsKey(move.Destination))
{
movesToDestination = moveDestinations[move.Destination];
}
else // initialise the list if it doesn't exist yet
{
movesToDestination = new List <MoveResolver>(6);
moveDestinations.Add(move.Destination, movesToDestination);
}
movesToDestination.Add(resolver);
}
else
{
resolver.Resolve(false); // reject if move is illegal
}
}
}
// STEP 4: MOVE CONFLICT RESOLUTION
foreach (var entry in moveDestinations) // check all future mech positions, finalise moves
{
var destination = entry.Key;
var moves = entry.Value;
var best = 0;
for (var i = 1; i < moves.Count; i++) // reject all moves here except the best one
{
if (Move.PriorityComparer.Compare(moves[i].Move, moves[best].Move) > 0)
{
moves[best].Resolve(false);
best = i;
}
else // not the best move: reject
{
moves[i].Resolve(false);
}
}
var dependency = moveOrigins.ContainsKey(destination) ? moveOrigins[destination] : null;
if (dependency != null)
{
moves[best].SetParent(dependency);
}
else
{
moves[best].Resolve(true);
}
}
#if DEBUG
DebugLogFrame();
#endif
}
RoundNumber++;
}
public TurnPlan GetMovementPlan(World world)
{
LastMove = _currentMove;
_currentMove = _moveMethod(this, world);
return(_currentMove);
}