/// <summary>
/// Moves the unit to the desired cell. Takes the appropriate
/// number of turns.
/// </summary>
/// <param name="destination">The coordinates on the <see cref="Grid"/>
/// the <see cref="Unit"/> is trying to move to.</param>
/// <returns></returns>
public virtual MoveResult MoveTo(Point destination)
{
GameRoot root = GameRoot.Instance;
Grid grid = root.Grid;
//create a journey to the destination
Journey journey = CreateJourney(destination);
ReadOnlyCollection <Point> path = journey.CalculateExistingPath();
if (journey == null)
{
return(MoveResult.UnreachableTerrain);
}
GridCell currentCell = grid.GetCell(this.Coordinates);
GridCell nextCell = grid.GetCell(this.Journey.PeekNextPoint());
int roadBonus = root.Ruleset.RoadMovementBonus;
if (roadBonus == 0)
{
throw new InvalidOperationException(ServerResources.RulesetHasInvalidRoadBonus);
}
if (this.MovesLeft == 0)
{
OnTurnFinished();
return(MoveResult.NoMovesLeft);
}
//fight any enemies at the destination
MoveResult result = CombatUnits(nextCell);
if (result == MoveResult.MoveSuccess)
{
//we're still alive, so we must have taken the new cell.
int moveCost = nextCell.Terrain.MovementCost;
if (currentCell.HasRoad && nextCell.HasRoad)
{
if (currentCell.HasRailroad && nextCell.HasRailroad)
{
moveCost = 0;
}
else
{
moveCost = moveCost / roadBonus;
}
}
//we can now actually move to the new cell.
this.Journey = journey;
ContinueJourney();
if (this.MovesLeft >= moveCost)
{
this.MovesLeft -= moveCost;
}
else
{
this.MovesLeft = 0;
}
//check for villages
if (nextCell.Village != null)
{
VillageGoody goody = nextCell.Village.Discover(this);
VillageEventArgs e = new VillageEventArgs(nextCell.Village, goody);
OnVillageEncountered(e);
nextCell.Village = null;
}
// Check to see if we just invaded a foreign city.
if (nextCell.City != null && nextCell.City.ParentCountry != ParentCountry)
{
nextCell.City.Capture(this);
}
OnMoved();
if (this.MovesLeft <= 0)
{
OnTurnFinished();
}
}
return(result);
}