// checks whether there would be a collison of the tetramino with the grid if the tetramino
// was moved by offset and rotated according to rotation type
public static bool Collision
(Grid grid, Tetramino tetramino, Vector2Int offset, Tetramino.RotationType rotation)
{
bool collision = false;
Vector2Int[] tryPoses = tetramino.GetAbsPoses(offset, rotation);
foreach (Vector2Int pos in tryPoses)
{
if (0 <= pos.x && pos.x < grid.blocks.GetLength(0) &&
0 <= pos.y && pos.y < grid.blocks.GetLength(1))
{
collision = grid[pos] != null;
}
else
{
collision = true;
}
if (collision)
{
break;
}
}
return(collision);
}
// returns cells' WORLD coordinates if the tetramino was moved by offset & rotated according to rotation type
public Vector2Int[] GetAbsPoses(Vector2Int offset, Tetramino.RotationType rotation)
{
Vector2Int[] rotated = RotateArray(Poses, rotationPoint, rotation);
return(VectorUtil.Add(rotated, centerPos + offset));
}
