protected override void UpdateWeapon(GameTime gameTime)
{
switch (_hookState)
{
case (HookState.Idle):
{
if (_firing)
{
_hookState = HookState.Fired;
_hookPosition = _owner.Position;
_hookAngle = XnaHelper.RadiansFromVector(_fireDirection);
_hookVelocity = _fireDirection * HOOK_SPEED;
}
break;
}
case (HookState.Fired):
{
if (!(_firing) &&
Vector2.Distance(_hookPosition, _owner.Position) < MAX_RANGE)
{
_hookPosition += _hookVelocity;
_hookHitRect.X = (int)_hookPosition.X;
_hookHitRect.Y = (int)_hookPosition.Y;
}
else
{
_hookState = HookState.Retracting;
}
break;
}
case (HookState.Retracting):
{
_hookPosition -= HOOK_SPEED * Vector2.Normalize(_hookPosition - _owner.Center);
if (XnaHelper.PointInRect(_hookPosition, _owner.HitRect))
{
_hookState = HookState.Idle;
}
break;
}
case (HookState.Attached):
{
_hookPosition = _hookedUnit.Center;
Vector2 pullForce = HOOK_FORCE * XnaHelper.DirectionBetween(_owner.Position, _hookedUnit.Position);
_owner.ApplyForce(pullForce);
_hookedUnit.ApplyForce(Vector2.Negate(pullForce));
if (_firing)
{
_hookState = HookState.Idle;
}
break;
}
}
}
/// <summary>
/// Check if target unit is in range. If so, apply force and damage
/// </summary>
/// <param name="effectPos">origin of effect</param>
/// <param name="target">target unit</param>
public void TryApply(Vector2 effectPos, PhysicalUnit target, TimeSpan time)
{
if (utility.XnaHelper.RectangleIntersectsCircle(target.HitRect, effectPos, _radius))
{
tempVec.X = target.Position.X - effectPos.X;
tempVec.Y = target.Position.Y - effectPos.Y;
Vector2.Normalize(tempVec);
float factor = Duration == TimeSpan.Zero ? 1 : (float)time.TotalSeconds / (float)Duration.TotalSeconds;
target.ApplyForce(_force * factor * tempVec);
target.ApplyDamage((_damage * factor));
target.ApplyStatus(_statEffects);
}
}