public static IEnumerable <Vector2> GetPositionsRelativeToTarget(this AbilityShape shape)
{
var positions = new List <Vector2>();
var targetPosition = Vector2.Zero;
for (var y = 0; y < shape.Size; ++y)
{
for (var x = 0; x < shape.Size; ++x)
{
if (shape[y, x] != AbilityShape.EmptyPoint)
{
if (shape[y, x] == AbilityShape.TargetPoint)
{
targetPosition = new Vector2(x, y);
}
else
{
positions.Add(new Vector2(x, y));
}
}
}
}
foreach (var position in positions)
{
yield return(new Vector2(position.X - targetPosition.X, position.Y - targetPosition.Y));
}
yield return(Vector2.Zero);
}
public static int ActiveCellCount(this AbilityShape shape)
{
var count = 0;
for (var y = 0; y < shape.Size; ++y)
{
for (var x = 0; x < shape.Size; ++x)
{
if (shape[y, x] != AbilityShape.EmptyPoint)
{
count++;
}
}
}
return(count);
}
public static AbilityShape Rotate90(this AbilityShape shape)
{
var result = new byte[shape.Size, shape.Size];
for (var y = 0; y < shape.Size; ++y)
{
for (var x = 0; x < shape.Size; ++x)
{
result[y, x] = shape.ShapeData[shape.Size - x - 1, y];
}
}
var newDirection = (byte)(shape.FacingDirection + 1);
if (newDirection > DirectionTypes.Left)
{
newDirection = DirectionTypes.Up;
}
return(new AbilityShape(shape.Size, result, newDirection));
}
public HasEnemiesInShapeModifier(Level level, AbilityShape shape)
{
Level = level;
Shape = shape;
_maxTargetableCount = Shape.ActiveCellCount();
}
public static AbilityShape Rotate180(this AbilityShape shape)
{
return(Rotate90(Rotate90(shape)));
}
public static IEnumerable <Vector2> GetLocationsFromShape(this Vector2 position, AbilityShape shape)
{
var relativePositions = shape.GetPositionsRelativeToTarget();
foreach (var relativePosition in relativePositions)
{
yield return(position + relativePosition);
}
}
public static int CountUnitsInShape(this Level level, Vector2 targetPosition, AbilityShape shape,
bool aliveOnly = true)
{
var allUnits = GetAllUnitsInShape(level, targetPosition, shape);
return(aliveOnly ? allUnits.ThatAreAlive().Count() : allUnits.Count());
}
public static IEnumerable <GameUnit> GetAllUnitsInShape(this Level level, Vector2 targetPosition, AbilityShape shape)
{
var targetPositions = targetPosition.GetLocationsFromShape(shape);
foreach (var position in targetPositions)
{
var possibleUnit = GetUnitAt(level, position);
if (possibleUnit != null)
{
yield return(possibleUnit);
}
}
}