/// <summary>
/// sets skill to be unusable visually
/// </summary>
/// <param name="slot"></param>
public void cannotUseSkill(int slot)
{
switch (slot)
{
case 1:
icon1.cannotUse();
break;
case 2:
icon2.cannotUse();
break;
case 3:
icon3.cannotUse();
break;
case 4:
icon4.cannotUse();
break;
}
}