public ProceduralPathArrow()
{
prevArrow = null;
nextArrow = null;
PossibleMoves = new PossibleMoves
{
Up = true,
Down = true,
Left = true,
Right = true
};
}
//Sometimes arrows are created diagonally from the previous
IEnumerator GenerateRandomPath()
{
bool pathCreateSuccess = false;
do
{
if (startingArrow != null)
{
Destroy(startingArrow.gameObject);
}
startingArrow = CreateArrow(startingColumn, startingRow, startingDirection);
currentArrow = startingArrow;
yield return new WaitForSeconds(0.5f);
int currentRow = startingArrow.row;
int currentColumn = startingArrow.column;
Direction currentDirection = startingArrow.Direction;
while (true)
{
//If the current arrow has no possible moves, delete it and return to the previous arrow, give the previous arrow a new possible direction
while (currentArrow.PossibleMoves.NoPossibleMoves)
{
Debug.Log("This arrow has no possible moves!");
//Should never happen
if (currentArrow.prevArrow == null)
{
break;
}
currentArrow.prevArrow.DisableFacingDirection();
currentArrow.prevArrow.RandomizePossibleDirection();
GameObject temp = currentArrow.gameObject;
currentArrow = currentArrow.prevArrow;
currentColumn = currentArrow.column;
currentRow = currentArrow.row;
currentArrow.nextArrow = null;
Destroy(temp);
}
if (currentArrow.prevArrow == null && currentArrow.PossibleMoves.NoPossibleMoves)
{
Debug.Log("Could not construct the map!");
pathCreateSuccess = false;
break;
}
//Move in front of the current arrow, end if there is an edge
//Check for arrow collisions
//If there is an arrow in the way, use a different direction
currentDirection = currentArrow.Direction;
GetNextSpace(currentDirection, ref currentColumn, ref currentRow);
//Edge of the map (Check BEFORE checking arrow collisions
if (currentColumn < 0 || currentColumn > columns - 1 || currentRow < 0 || currentRow > rows - 1)
{
//Move back a space
currentColumn = currentArrow.column;
currentRow = currentArrow.row;
currentArrow.DisableFacingDirection();
currentArrow.RandomizePossibleDirection();
Debug.Log("Hit the edge of the map!");
continue;
}
if (arrowList[currentRow * rows + currentColumn] != null)
{
//Move back a space
currentColumn = currentArrow.column;
currentRow = currentArrow.row;
currentArrow.DisableFacingDirection();
currentArrow.RandomizePossibleDirection();
Debug.Log("Arrow collision!");
continue;
}
if (currentColumn == endColumn && currentRow == endRow)
{
Debug.Log("Reached the defendable object!");
pathCreateSuccess = true;
break;
}
//At this point, there should be an empty space in front of the current arrow
//Create a new arrow in front of the current arrow
ProceduralPathArrow nextArrow = CreateArrow(currentColumn, currentRow, currentDirection);
nextArrow.DisableOppositeDirection();
//Randomize the new arrow's direction
currentDirection = RandomDirection(currentDirection);
nextArrow.Direction = currentDirection;
currentArrow.nextArrow = nextArrow;
nextArrow.prevArrow = currentArrow;
currentArrow = nextArrow;
}
} while (!pathCreateSuccess);
}
