/// <summary>
/// Get the co-ordinates with respectt to grid and return the Cell type enum
/// </summary>
/// <param name="grid"></param>
/// <param name="coOrdinates"></param>
/// <returns>returns CellTypeEnum</returns>
public static CellTypeEnum GetCellType(Grid grid, CoOrdinates coOrdinates)
{
if ((coOrdinates.X < -1 || coOrdinates.X > grid.RowCount) || (coOrdinates.Y < -1 || coOrdinates.Y > grid.ColumnCount))
{
throw new ArgumentOutOfRangeException("Invalid Index value: must be greater than or equal to minus one and less than or equal to Row count");
}
CellTypeEnum enumCellType = CellTypeEnum.None;
if (coOrdinates.X == 0 && coOrdinates.Y == 0)
enumCellType = CellTypeEnum.TopLeftCorner;
else if (coOrdinates.X == 0 && coOrdinates.Y == grid.ColumnCount - 1)
enumCellType = CellTypeEnum.TopRightCorner;
else if (coOrdinates.X == grid.RowCount - 1 && coOrdinates.Y == 0)
enumCellType = CellTypeEnum.BottomLeftCorner;
else if (coOrdinates.X == grid.RowCount - 1 && coOrdinates.Y == grid.ColumnCount - 1)
enumCellType = CellTypeEnum.BottomRightCorner;
else if (coOrdinates.X == 0 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
enumCellType = CellTypeEnum.TopSide;
else if (coOrdinates.X == grid.RowCount - 1 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
enumCellType = CellTypeEnum.BottomSide;
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == 0)
enumCellType = CellTypeEnum.LeftSide;
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == grid.ColumnCount - 1)
enumCellType = CellTypeEnum.RightSide;
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
enumCellType = CellTypeEnum.Center;
else if (coOrdinates.X == -1 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
enumCellType = CellTypeEnum.OuterTopSide;
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == grid.ColumnCount)
enumCellType = CellTypeEnum.OuterRightSide;
else if (coOrdinates.X == grid.RowCount && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
enumCellType = CellTypeEnum.OuterBottomSide;
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == -1)
enumCellType = CellTypeEnum.OuterLeftSide;
return enumCellType;
}
/// <summary>
/// Change Cell state of specified co-ordinate using Ruls
/// </summary>
/// <param name="inputGrid"></param>
/// <param name="outputGrid"></param>
/// <param name="coOrdinates"></param>
public static void ChangeCellsState(Grid inputGrid, Grid outputGrid, CoOrdinates coOrdinates)
{
int liveNeighbourCount = CountAliveNeighbours(inputGrid, coOrdinates);
lock (outputGrid)
{
if (IsAliveInNextState(inputGrid[coOrdinates.X, coOrdinates.Y], liveNeighbourCount))
{
//set output grid's cell to live only if it is in alive status in next generation
outputGrid[coOrdinates.X, coOrdinates.Y].IsAlive = true;
}
}
}
/// <summary>
/// Change Cell state of specified co-ordinate using Ruls
/// </summary>
/// <param name="inputGrid"></param>
/// <param name="outputGrid"></param>
/// <param name="coOrdinates"></param>
public static void ChangeCellsState(Grid inputGrid, Grid outputGrid, CoOrdinates coOrdinates)
{
int liveNeighbourCount = CountAliveNeighbours(inputGrid, coOrdinates);
lock (outputGrid)
{
if (IsAliveInNextState(inputGrid[coOrdinates.X, coOrdinates.Y], liveNeighbourCount))
{
//set output grid's cell to live only if it is in alive status in next generation
outputGrid[coOrdinates.X, coOrdinates.Y].IsAlive = true;
}
}
}
/// <summary>
/// Check if the adjacent cell is alive or not
/// </summary>
/// <param name="grid"></param>
/// <param name="baseCoOrdinates"></param>
/// <param name="offSetCoOrdinates"></param>
/// <returns>returns 1 if live otherwise 0</returns>
private static int IsAliveNeighbour(Grid grid, CoOrdinates baseCoOrdinates, CoOrdinates offSetCoOrdinates)
{
int live = 0; // set default as 0
int x = baseCoOrdinates.X + offSetCoOrdinates.X; // get x axis of neighbour
int y = baseCoOrdinates.Y + offSetCoOrdinates.Y; // get y axis of neighbour
// check the computed bound is within range of grid, if it is not within bounds live is 0 as default
if ((x >= 0 && x < grid.RowCount) && y >= 0 && y < grid.ColumnCount)
{
// if reachable neighbour cell is alive then set live to 1 otherwise 0
live = grid[x, y].IsAlive ? 1 : 0;
}
return(live);
}
/// <summary>
/// Count live adjacent cells for specified cell co-ordinates
/// </summary>
/// <param name="grid"></param>
/// <param name="coOrdinates"></param>
/// <returns>returns number of live neighbours</returns>
private static int CountAliveNeighbours(Grid grid, CoOrdinates coOrdinates)
{
int liveNeighbours = 0;
// Get the Cell type of current cell
CellTypeEnum enumInnerCell = ReachableCell.GetCellType(grid, coOrdinates);
List <CoOrdinates> reachableCells = new List <CoOrdinates>();
// populate reachable cells from current cell for easier traversing
ReachableCell.ReachableCells.TryGetValue(enumInnerCell, out reachableCells);
if (reachableCells.Count == 0)
{
throw new ArgumentNullException("Cannot find reachable co-ordinates");
}
foreach (CoOrdinates coOrds in reachableCells)
{
liveNeighbours += IsAliveNeighbour(grid, coOrdinates, coOrds);
}
return(liveNeighbours);
}
/// <summary>
/// Get the co-ordinates with respectt to grid and return the Cell type enum
/// </summary>
/// <param name="grid"></param>
/// <param name="coOrdinates"></param>
/// <returns>returns CellTypeEnum</returns>
public static CellTypeEnum GetCellType(Grid grid, CoOrdinates coOrdinates)
{
if ((coOrdinates.X < -1 || coOrdinates.X > grid.RowCount) || (coOrdinates.Y < -1 || coOrdinates.Y > grid.ColumnCount))
{
throw new ArgumentOutOfRangeException("Invalid Index value: must be greater than or equal to minus one and less than or equal to Row count");
}
CellTypeEnum enumCellType = CellTypeEnum.None;
if (coOrdinates.X == 0 && coOrdinates.Y == 0)
{
enumCellType = CellTypeEnum.TopLeftCorner;
}
else if (coOrdinates.X == 0 && coOrdinates.Y == grid.ColumnCount - 1)
{
enumCellType = CellTypeEnum.TopRightCorner;
}
else if (coOrdinates.X == grid.RowCount - 1 && coOrdinates.Y == 0)
{
enumCellType = CellTypeEnum.BottomLeftCorner;
}
else if (coOrdinates.X == grid.RowCount - 1 && coOrdinates.Y == grid.ColumnCount - 1)
{
enumCellType = CellTypeEnum.BottomRightCorner;
}
else if (coOrdinates.X == 0 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
{
enumCellType = CellTypeEnum.TopSide;
}
else if (coOrdinates.X == grid.RowCount - 1 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
{
enumCellType = CellTypeEnum.BottomSide;
}
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == 0)
{
enumCellType = CellTypeEnum.LeftSide;
}
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == grid.ColumnCount - 1)
{
enumCellType = CellTypeEnum.RightSide;
}
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
{
enumCellType = CellTypeEnum.Center;
}
else if (coOrdinates.X == -1 && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
{
enumCellType = CellTypeEnum.OuterTopSide;
}
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == grid.ColumnCount)
{
enumCellType = CellTypeEnum.OuterRightSide;
}
else if (coOrdinates.X == grid.RowCount && (coOrdinates.Y > 0 && coOrdinates.Y < grid.ColumnCount - 1))
{
enumCellType = CellTypeEnum.OuterBottomSide;
}
else if ((coOrdinates.X > 0 && coOrdinates.X < grid.RowCount - 1) && coOrdinates.Y == -1)
{
enumCellType = CellTypeEnum.OuterLeftSide;
}
return(enumCellType);
}
/// <summary>
/// Check if the adjacent cell is alive or not
/// </summary>
/// <param name="grid"></param>
/// <param name="baseCoOrdinates"></param>
/// <param name="offSetCoOrdinates"></param>
/// <returns>returns 1 if live otherwise 0</returns>
private static int IsAliveNeighbour(Grid grid, CoOrdinates baseCoOrdinates, CoOrdinates offSetCoOrdinates)
{
int live = 0; // set default as 0
int x = baseCoOrdinates.X + offSetCoOrdinates.X; // get x axis of neighbour
int y = baseCoOrdinates.Y + offSetCoOrdinates.Y; // get y axis of neighbour
// check the computed bound is within range of grid, if it is not within bounds live is 0 as default
if ((x >= 0 && x < grid.RowCount) && y >= 0 && y < grid.ColumnCount)
{
// if reachable neighbour cell is alive then set live to 1 otherwise 0
live = grid[x, y].IsAlive ? 1 : 0;
}
return live;
}
/// <summary>
/// Count live adjacent cells for specified cell co-ordinates
/// </summary>
/// <param name="grid"></param>
/// <param name="coOrdinates"></param>
/// <returns>returns number of live neighbours</returns>
private static int CountAliveNeighbours(Grid grid, CoOrdinates coOrdinates)
{
int liveNeighbours = 0;
// Get the Cell type of current cell
CellTypeEnum enumInnerCell = ReachableCell.GetCellType(grid, coOrdinates);
List<CoOrdinates> reachableCells = new List<CoOrdinates>();
// populate reachable cells from current cell for easier traversing
ReachableCell.ReachableCells.TryGetValue(enumInnerCell, out reachableCells);
if (reachableCells.Count == 0) throw new ArgumentNullException("Cannot find reachable co-ordinates");
foreach (CoOrdinates coOrds in reachableCells)
{
liveNeighbours += IsAliveNeighbour(grid, coOrdinates, coOrds);
}
return liveNeighbours;
}