/// <summary>
/// Retrieves a "good" destination for the current selected unit.
/// A "good" destination is a destination with no enemy on it that is not a sea position.
/// </summary>
/// <param name="game">The game</param>
/// <param name="currentPos">The current position of the unit.</param>
/// <param name="unit">The unit.</param>
/// <returns>The destination choosen.</returns>
private IPoint GetDestination(IGame game, IPoint currentPos, IUnit unit)
{
int[] xOffsets = new int[4] {0, -1, 1, 0};
int[] yOffsets = new int[4] {-1, 0, 0, 1};
for(int i=0; i<4; i++) {
IPoint destination = new Point(currentPos.X + xOffsets[i], currentPos.Y + yOffsets[i]);
if(destination.isValid(game.Map.Size)) {
if(!(game.Map.GetTile(destination) is ISea) && !game.Map.IsEnemyPosition(destination, unit)) {
return destination;
}
}
}
// We decided to fail in that case as it is hightly improbable that
// no vacant destination point is available.
// Indeed our map is made so that every position can be reached.
Assert.Fail("nothing next to " + currentPos);
return null;
}
/// <summary>
/// Retrieves the neighbours' types of a specific position.
/// </summary>
/// <param name="pos">The position.</param>
/// <returns>An array of neighbours' types, or null if a neighbour was out bounds.</returns>
private ITile[] GetNeighbours(IPoint pos)
{
int[] xOffset = {0, -1, 0, 1};
int[] yOffset = {0, -1, 0, 1};
ITile[] neighbours = new ITile[4];
for(int i=0; i<4; i++) {
IPoint neighbour = new Point(pos.X + xOffset[i], pos.Y + yOffset[i]);
if(neighbour.isValid(this.map.Size)) {
neighbours[i] = this.map.GetTile(neighbour);
} else {
neighbours[i] = null;
}
}
return neighbours;
}