private void removePowerToTilesFrom(int col, int row)
{
for (int i = 0; i < powerPositions.Count; ++i)
{
int xPos = powerPositions [i].x + col;
int yPos = powerPositions [i].y + row;
if (xPos >= 0 && xPos < StageScript.numCols && yPos >= 0 && yPos < StageScript.numRows)
{
PowerManagement.removePower(heroType, (uint)xPos, (uint)yPos);
}
}
}