private void AddAdjacentPixelsOnX(ICollection <MapPixel> adjacentPixels, IThreeDimensionalCoordinate coordinate)
{
var currentCoordinate = new MapCoordinate(coordinate.GetX(), coordinate.GetY());
for (var xOff = -1; xOff <= 1; xOff += 2)
{
currentCoordinate.SetX(coordinate.GetX() + xOff);
if (CoordinateIsInBounds(coordinate))
{
adjacentPixels.Add(_map[currentCoordinate.GetX(), currentCoordinate.GetY()]);
}
}
}
