private bool isSkippableIndex(Point i_destination, Point i_origin)
{
bool isDistTwo = (Math.Abs(i_destination.X - i_origin.X) == 2) && (Math.Abs(i_destination.Y - i_origin.Y) == 2);
bool isOpen = this.GetPieceByIndex(i_destination) == DamkaPieces.Type.None;
Point p = new Point((i_destination.X + i_origin.X) / 2, (i_destination.Y + i_origin.Y) / 2);
bool isSkippable = DamkaPieces.IsEnemyType(this.GetPieceByIndex(p), this.GetPieceByIndex(i_origin));
return(isDistTwo && isOpen && isSkippable);
}
private void checkIfEaten(Point i_index0, Point i_index1)
{
int howManySkipped = 0;
int adder = (i_index1.X - i_index0.X > 0) ? -1 : 1;
int deltaY = i_index0.Y - i_index1.Y;
int deltaX = i_index0.X - i_index1.X;
int m = deltaY / deltaX;
int xLow = (i_index0.X < i_index1.X) ? i_index0.X : i_index1.X;
int xHigh = (xLow == i_index1.X) ? i_index0.X : i_index1.X;
int yOfLow = (xLow == i_index0.X) ? i_index0.Y : i_index1.Y;
for (int x = i_index1.X + adder; x >= xLow && x <= xHigh; x = x + adder)
{
int y = m * (x - xLow) + yOfLow;
DamkaPieces.Type tmp = this.GetPieceByIndex(new Point(x, y));
if (DamkaPieces.IsEnemyType(tmp, this.GetPieceByIndex(i_index1)))
{
if (this.isSkippableIndex(i_index0, i_index1))
{
howManySkipped++;
}
}
}
if (howManySkipped == 1)
{
for (int x = i_index1.X + adder; x >= xLow && x <= xHigh; x = x + adder)
{
int y = m * (x - xLow) + yOfLow;
Point p = new Point(x, y);
DamkaPieces.Type tmp = this.GetPieceByIndex(p);
if (DamkaPieces.IsEnemyType(tmp, this.GetPieceByIndex(i_index1)))
{
if (this.isSkippableIndex(i_index0, i_index1))
{
this.placePieceAt(p, DamkaPieces.Type.None);
}
}
}
}
}
private bool isIndexAbstractedByEnemy(Point i_destination, Point i_origin)
{
int adder = (i_origin.X - i_destination.X > 0) ? -1 : 1;
int deltaY = i_destination.Y - i_origin.Y;
int deltaX = i_destination.X - i_origin.X;
int m = deltaY / deltaX;
int xLow = (i_destination.X < i_origin.X) ? i_destination.X : i_origin.X;
int xHigh = (xLow == i_origin.X) ? i_destination.X : i_origin.X;
int yOfLow = (xLow == i_destination.X) ? i_destination.Y : i_origin.Y;
int distance = 0;
// count how many enemies between the points.
int numberOfEnemiesInRange = 0;
for (int x = i_origin.X + adder; x >= xLow && x <= xHigh; x = x + adder)
{
distance++;
int y = m * (x - xLow) + yOfLow;
DamkaPieces.Type tmp = this.GetPieceByIndex(new Point(x, y));
if (DamkaPieces.IsEnemyType(tmp, this.GetPieceByIndex(i_origin)))
{
numberOfEnemiesInRange++;
}
}
bool isKing = DamkaPieces.isKing(this.GetPieceByIndex(i_origin));
bool result = false;
if (isKing && numberOfEnemiesInRange == 1)
{
result = false;
}
else if (distance == 1 && numberOfEnemiesInRange == 1)
{
result = true;
}
return(result);
}