protected void lookThisWay(Vector2 direction)
{
SpriteState spriteDirection;
float angle = XnaHelper.RadiansFromVector(direction);
if (angle > -Math.PI / 4 && angle < Math.PI / 4)
{
spriteDirection = SpriteState.FaceUp;
}
else if (angle >= Math.PI / 4 && angle < 3 * Math.PI / 4)
{
spriteDirection = SpriteState.FaceRight;
}
else if (angle > 3 * Math.PI / 4 || angle < -3 * Math.PI / 4)
{
spriteDirection = SpriteState.FaceDown;
}
else
{
spriteDirection = SpriteState.FaceLeft;
}
_sprite.AnimationState = (int)spriteDirection;
}
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;
}
}
}
public override void CheckAndApplyCollision(PhysicalUnit unit, TimeSpan time)
{
if (!_firing || !unit.Collides)
{
return; //don't check collisions if not firing
}
float fireAngle = XnaHelper.RadiansFromVector(_fireDirection);
if (XnaHelper.RectangleIntersectsArc(unit.HitRect, _owner.Center, _range, fireAngle, _hitArc))
{
_tempVector = unit.Center - _owner.Center;
_tempVector.Normalize();
unit.ApplyImpact(_force * _tempVector, 1);
unit.ApplyDamage(_damage);
}
}