/// <summary>Creates a grid full of maze cells based on given width and heigth values</summary>
private void CreateMazeCells()
{
Cells = new MazeCell[width, height];
Camera camera = Camera.main;
Bounds cellBounds = prefabMazeCell.GetComponent <SpriteRenderer>().bounds;
Vector3 cellScale = prefabMazeCell.transform.localScale;
Vector3 bottomLeft = camera.ScreenToWorldPoint(Vector3.zero);
Vector3 topLeft = camera.ScreenToWorldPoint(new Vector3(0, Screen.height));
Vector3 bottomRight = camera.ScreenToWorldPoint(new Vector3(Screen.width, 0));
float screenWidth = (bottomLeft - bottomRight).magnitude;
float screenHeight = (topLeft - bottomLeft).magnitude;
float cellWidth = cellBounds.size.x;
float cellHeight = cellBounds.size.y;
float gridWidth = cellWidth * width;
float gridHeight = cellHeight * height;
//scale cells down if grid width is greater than screen width
if (gridWidth > screenWidth)
{
cellScale *= (screenWidth / gridWidth);
cellWidth = cellBounds.size.x * cellScale.x;
cellHeight = cellBounds.size.y * cellScale.y;
gridWidth = cellWidth * width;
gridHeight = cellHeight * height;
}
//scale cells down if grid height is greater than screen height after first reduction
if (gridHeight > screenHeight)
{
cellScale *= (screenHeight / gridHeight);
cellWidth = cellBounds.size.x * cellScale.x;
cellHeight = cellBounds.size.y * cellScale.y;
gridWidth = cellWidth * width;
gridHeight = cellHeight * height;
}
//scale cells up if the screen size is bigger than the grid size
if (gridWidth < screenWidth && gridHeight < screenHeight)
{
//use lowest percentage of width and height to scale cells up
cellScale *= Mathf.Min((screenHeight / gridHeight), (screenWidth / gridWidth));
cellWidth = cellBounds.size.x * cellScale.x;
cellHeight = cellBounds.size.y * cellScale.y;
gridWidth = cellWidth * width;
gridHeight = cellHeight * height;
}
//assign left and bottom margin values based on leftover space between screen and grid
float left = (screenWidth - gridWidth) * 0.5f;
float bottom = (screenHeight - gridHeight) * 0.5f;
//set origin of grid at bottom left, including compensation for pivot of cell being at the center
Vector3 origin = bottomLeft + Vector3.Scale(cellBounds.extents, cellScale);
//create the grid
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
float xPos = left + x * cellWidth;
float yPos = bottom + y * cellWidth;
Cells[x, y] = CreateMazeCell(origin.x + xPos, origin.y + yPos, x, y, cellScale);
}
}
}
/// <summary>
/// Returns the neighbour to the right of given cell. Will return null if the neighbour was outside of the grid
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
public MazeCell GetRightNeighbour(MazeCell cell)
{
//only returns the top maze cell relative to given x,y coordinates if x coordinate is inside the maze x dimension
return(cell.MazeX + 1 < Cells.GetLength(0) ? Cells[cell.MazeX + 1, cell.MazeY] : null);
}
/// <summary>
/// Returns the neighbour below given cell. Will return null if the neighbour was outside of the grid
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
public MazeCell GetBottomNeighbour(MazeCell cell)
{
//only returns the top maze cell relative to given x,y coordinates if y coordinate is inside the maze y dimension
return(cell.MazeY - 1 >= 0 ? Cells[cell.MazeX, cell.MazeY - 1] : null);
}
/// <summary>
/// Returns the neighbour to the left of given cell. Will return null if the neighbour was outside of the grid
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
public MazeCell GetLeftNeighbour(MazeCell cell)
{
//only returns the top maze cell relative to given x,y coordinates if x coordinate is inside the maze x dimension
return(cell.MazeX - 1 >= 0 ? Cells[cell.MazeX - 1, cell.MazeY] : null);
}
/// <summary>
/// Returns the neighbour above given cell. Will return null if the neighbour was outside of the grid
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
public MazeCell GetTopNeighbour(MazeCell cell)
{
//only returns the top maze cell relative to given x,y coordinates if y coordinate is inside the maze y dimension
return(cell.MazeY + 1 < Cells.GetLength(1) ? Cells[cell.MazeX, cell.MazeY + 1] : null);
}
