/// <summary>
/// Apply Gravity on a unit and eat it if close enough
/// call on each unit during unit update loop
/// </summary>
/// <param name="unit">unit to affect. Should be called after updating unit</param>
public void ApplyToUnit(PhysicalBody unit, GameTime gameTime)
{
float massEaten;
if (_state != BlackHoleState.Pulling && _state != BlackHoleState.Overdrive)
return;
if (_state == BlackHoleState.Pulling)
{
unit.ApplyGravity(Gravity, gameTime);
}
else if (_state == BlackHoleState.Overdrive)
{
unit.FlyToPoint(Position, _overdriveTimer, 2.0f);
}
if ((massEaten = unit.EatByBlackHole(Position, _radius)) > 0)
{
_capacityUsed += massEaten;
_particleEffect.IntensityFactor = 1.0f + _capacityUsed / _totalCapacity;
Gravity.MagnitudeFactor = (1.0f + _capacityUsed / _totalCapacity);
if (_capacityUsed > _totalCapacity)
{
goOverdrive();
}
}
}
public void CheckAndApplyCollision(PhysicalBody unit, GameTime gameTime)
{
switch (_state)
{
case State.Dormant:
break;
case State.Appearing:
case State.Scanning:
unit.ApplyGravity(_gravity, gameTime);
break;
case State.Charging:
unit.ApplyGravity(_gravity, gameTime);
if (willCollide(unit.Top, unit.Bottom, unit.Left, unit.Right, gameTime.ElapsedGameTime))
{
unit.ApplyImpact(_velocity, IMPACT_IMPULSE);
unit.ApplyDamage(IMPACT_DAMAGE);
break;
}
break;
}
}