// check ball2ball and ball2ship collisions
public void OnCollision(Gamelet sender, GameletEventArgs e)
{
/*
if (e.otherItem is Ball && Parent is Ball)
{
Ball parentBall = Parent as Ball;
Ball collidingBall = e.otherItem as Ball;
if (parentBall.nrgCharge != null)
{
isEndOfLifeMode = true;
Charged = false;
}
}
*/
if (e.otherItem is Ship && !isEndOfLifeMode )
{
Ship ship = e.otherItem as Ship;
// uncouple from my parent (whatever it was)
LinkedToParent = false;
Position = Parent.PositionAbsolute;
// reduce velocity
Velocity = new Vector2(Parent.Velocity.X * 0.75f, Parent.Velocity.Y * 0.75f);
isEndOfLifeMode = true;
Charged = false;
// score
ship.player.Score += 100.0f;
// energy increaes
ship.player.NRG += 2.0f; // TODO
}
}
/**
* called upon collision event of my associated NRGCharge (or Ball or ... other)
*/
public void OnBallCollided(Gamelet item, GameletEventArgs e)
{
if (e.otherItem is Ship)
{
// switch off my dimming behaviour.
this.Active = false;
}
}
public void OnCollision(Gamelet item, GameletEventArgs e)
{
if (!(e.otherItem is Ship))
return;
Ship ship = e.otherItem as Ship;
Ball ball = Parent as Ball;
Vector2 ballPos = ball.PositionAbsolute;
Vector2 shipPos = ship.PositionAbsolute;
Vector2 localNormal;
float h2, r;
// never let ball bounce back twice in the same period of time.
if (ball.Velocity.X > 0)
return;
if (ballPos.X < (shipPos.X)) // if already left-of ship
return;
r = ship.WidthAbsolute / 2;
h2 = ship.HeightAbsolute / 2 - r;
// check where ball is: up, down or middle zone of ship
if (ballPos.Y < shipPos.Y - h2)
{ // up zone
Vector2 p = new Vector2(shipPos.X, shipPos.Y - h2);
localNormal = ballPos - p;
localNormal.Normalize();
}
else if (ballPos.Y > shipPos.Y + h2)
{ // down zone
Vector2 p = new Vector2(shipPos.X, shipPos.Y + h2);
localNormal = ballPos - p;
localNormal.Normalize();
}
else
{ // middle zone
ball.Velocity = new Vector2(-ball.Velocity.X, ball.Velocity.Y);
return;
}
// reduce mass after refl
ball.Mass /= 10.0f;
//Vector2 newItemVelocity;
//Vector2 itemVelocity = item.Velocity;
//Vector2.Reflect(ref itemVelocity, ref localNormal, out newItemVelocity);
ball.Velocity = localNormal * ball.Velocity.Length(); //new Vector2(-newItemVelocity.X, newItemVelocity.Y);
}
public void OnCollision(Gamelet item, GameletEventArgs e)
{
if (!(e.otherItem is Ball))
return;
Ship ship = Parent as Ship;
Ball ball = e.otherItem as Ball;
// impact vector of Ball
Vector2 v = ball.Velocity;
v.Y = -v.Y;
// calc rotation
float dy = (ball.PositionAbsolute.Y - ship.PositionAbsolute.Y);
float rotAmpl = ball.Mass * dy / 1.5f;
ship.AddFront(new LashbackBehavior(ball.Mass * v / 30.0f, rotAmpl));
//ball.Mass /= 10.0f;
}
public void OnCollision(Gamelet item, GameletEventArgs e)
{
Gamelet withItem = e.otherItem;
// TODO reset the lastCollide when not-colliding
if (lastCollidedWith != withItem)
{
if (withItem is Ball)
{
Ball ball = withItem as Ball;
// swap the velocity vecs - pseudo-phyics eff
Vector2 v = ball.Velocity;
ball.Velocity = item.Velocity;
item.Velocity = v;
}
lastCollidedWith = withItem;
}
}
