public static bool CheckValidMove(Vector2Int aOffset, List <BlockObject> aSelectedList)
{
// print("CHECKING VALID MOVE");
HashSet <Vector2Int> checkTopPositions = new HashSet <Vector2Int>();
HashSet <Vector2Int> checkBotPositions = new HashSet <Vector2Int>();
foreach (BlockObject block in aSelectedList)
{
// for each position inside block
for (int x = 0; x < block.size.x; x++)
{
for (int y = 0; y < block.size.y; y++)
{
Vector2Int currentPos = block.pos + aOffset + new Vector2Int(x, y);
// check if in bounds of level
if (!GameUtil.IsInside(currentPos, Vector2Int.zero, BoardManager.Instance.levelData.boardSize))
{
// print("IS BLOCKED! NOT IN LEVEL BOUNDS");
return(false);
}
BlockObject maybeABlock = GetBlockOnPosition(currentPos);
// check if this position is occupied by something not itself
if (maybeABlock != null && !aSelectedList.Contains(maybeABlock))
{
// print("IS BLOCKED! INVALID MOVE!!!");
return(false);
}
// check if a mob exists on this position
MobObject maybeAMob = GetMobOnPosition(currentPos);
if (maybeAMob != null)
{
// print("IS BLOCKED! MOB EXISTS HERE");
return(false);
}
}
}
// fill in checktop/checkbot positions as a list of pos that need to be checked
for (int x = block.ghostPos.x; x < block.ghostPos.x + block.size.x; x++)
{
int aboveY = block.ghostPos.y + block.size.y;
int belowY = block.ghostPos.y - 1;
Vector2Int topPos = new Vector2Int(x, aboveY);
Vector2Int botPos = new Vector2Int(x, belowY);
foreach (BlockObject otherBlock in aSelectedList)
{
if (PlayingManager.GetSelectedBlockOnPosition(topPos) == null)
{
// print("toppos does not contain a selected block");
Vector2Int checkPos = new Vector2Int(x, aboveY);
checkTopPositions.Add(checkPos);
}
if (PlayingManager.GetSelectedBlockOnPosition(botPos) == null)
{
// print("botpos does not contain a selected block");
Vector2Int checkPos = new Vector2Int(x, belowY);
checkBotPositions.Add(checkPos);
}
}
}
}
bool connectedOnTop = false;
bool connectedOnBot = false;
foreach (Vector2Int pos in checkTopPositions)
{
// print("examining pos " + pos);
if (GetBlockOnPosition(pos) != null && !aSelectedList.Contains(GetBlockOnPosition(pos)))
{
connectedOnTop = true;
// print("connected on top at" + pos);
}
}
foreach (Vector2Int pos in checkBotPositions)
{
// print("examining pos " + pos);
if (GetBlockOnPosition(pos) != null && !aSelectedList.Contains(GetBlockOnPosition(pos)))
{
connectedOnBot = true;
// print("connected on bot at" + pos);
}
}
if (connectedOnTop == true && connectedOnBot == true)
{
// print("IS SANDWICHED! INVALID MOVE!!!");
return(false);
}
else if (connectedOnTop == false && connectedOnBot == false)
{
// print("IS FLOATING! INVALID MOVE!!!");
return(false);
}
else
{
// print ("VALID MOVE");
return(true);
}
}