public override void Update(Paddle playerPaddle, Paddle opponentPadde, Puck puck, float deltaTime)
{
playerPaddle.velocity = (clientToView(mouseX(), mouseY()) - playerPaddle.position) / deltaTime;
// string toSend = userName + ":\n" + tbSend.Text;
var data = Encoding.ASCII.GetBytes(playerPaddle.position.X.ToString() + ' ' + playerPaddle.position.Y + ' ' +
playerPaddle.velocity.X.ToString() + ' ' + playerPaddle.velocity.Y.ToString());
client.Send(data, data.Length);
}
public override void Update(Paddle playerPaddle, Paddle opponentPaddle, Puck puck, float deltaTime)
{
thinkTimer += deltaTime;
if (thinkTimer > 0.4)
{
thinkTimer = 0.0f;
if (puck.position.Y < 0) // puck is on player side, move towards defensive position(close to goal).
state = AIState.Defense;
// else if (puck.velocity.Y < 0)
// aiState = AIState.Defense;
// else if ((puck.position - paddles[1].position).Y + Constants.puckRadius + Constants.paddleRadius > 0)
// aiState = AIState.Defense;
else
state = AIState.Attack;
}
Vector2 trajectory;
if (state == AIState.Defense)
{
target = new Vector2(0, 0.4f * Constants.tableHeight);
target.X += puck.position.X;
}
else
{
target = puck.position + new Vector2(0, Constants.puckRadius * 0.6f); // try to hit near the top but a little inside
}
trajectory = target - playerPaddle.position;
trajectory.Normalize();
playerPaddle.velocity = trajectory * speed;
// don't overshoot target
if (speed * deltaTime > (target - playerPaddle.position).GetLength() - Constants.puckRadius - Constants.paddleRadius && state == AIState.Defense)
{ //TODO: this is wrong, the impulse should not be small when we are really close...
playerPaddle.velocity = trajectory * ((target - playerPaddle.position).GetLength() - Constants.puckRadius - Constants.paddleRadius) / deltaTime;
}
}
public bool PaddlePositionCorrection(int player, Puck puck, Paddle[] paddles)
{
Vector2 diff = puck.position - paddles[player].position;
float sumRadii = Constants.paddleRadius + Constants.puckRadius;
if (diff.GetLengthSquared() < sumRadii * sumRadii)
{
// since the paddle is treated as almost infinite mass, the impules equations just becomes the reflection equation with some restitution.
Vector2 normal;
float length = diff.GetLength();
if (length > 0.001f)
{
normal = diff / length;
}
else
{
normal = new Vector2(0, 0);
}
Vector2 relativeVelocity = puck.velocity - paddles[player].velocity;
float j = -(1.0f + Constants.paddleRestitution) * Vector2.Dot(relativeVelocity, normal);
puck.position += normal * (sumRadii - length); // position correction, move out of overlap, TODO: add an epsilon?
if (j > 0) // never move towards the collison object
{
puck.velocity += normal * j;
}
if (puck.velocity.GetLength() > Constants.maxPuckSpeed)
{
puck.velocity = Constants.maxPuckSpeed * puck.velocity / puck.velocity.GetLength();
}
return true;
}
return false;
}
public AppWindow()
: base(640/2, 1136/2)
{
viewWidth = 4.5f;
viewHeight = 9.0f;
puck = new Puck();
puck.position = new Vector2(0.0f, 0.0f);
puck.velocity = new Vector2(0, 0);
paddles = new Paddle[2];
paddles[0] = new Paddle();
paddles[1] = new Paddle();
paddles[0].position = new Vector2(0.0f, -0.7f);
paddles[1].position = new Vector2(0.0f, 0.7f);
renderer = new Renderer();
renderer.MediaPath = mediaPath;
renderer.Viewport(Width, Height);
renderer.OrthoCentered(viewWidth, viewHeight);
startMenu = new StartMenu(renderer, this);
gameOverMenu = new GameOverMenu(renderer, this);
opponentPlayer = new LANGameOpponentPlayer();
physics = new Physics();
soundEngine = new ISoundEngine();
networking = new Networking();
//networking.InitializeReceiver();
//networking.InitializeSender();
// networking.StartGameSearch();
//networking.UpdateReceiver = ReceiveUpdate;
localPlayer = new LANGameLocalPlayer(() => MouseX, () => MouseY, ClientToView, IPAddress.Parse("192.168.1.108"));
}
public int PositionCorrection(Puck puck, Paddle[] paddles)
{
float epsilon = 0.0001f;
bool collision;
// if there is a collision from both the paddle and the table, the puck is being squeezed between the two.
// the contact get set to the table collision, it's better to have some puck/paddle overlap than to have the puck go off the screen and break the game.
//TODO: should I collision correct the puck and prevent all overlap??
if(PaddlePositionCorrection(0, puck, paddles))
{
collision = true;
}
if (PaddlePositionCorrection(1, puck, paddles))
{
collision = true;
}
if (puck.position.X + Constants.puckRadius > Constants.tableWidth * 0.5f)
{
puck.position.X = Constants.tableWidth * 0.5f - Constants.puckRadius + epsilon;
puck.velocity.X = -puck.velocity.X * Constants.tableRestitution;
collision = true;
}
if (puck.position.X - Constants.puckRadius < -Constants.tableWidth * 0.5f)
{
puck.position.X = -Constants.tableWidth * 0.5f + Constants.puckRadius - epsilon;
puck.velocity.X = -puck.velocity.X * Constants.tableRestitution;
collision = true;
}
if (puck.position.Y + Constants.puckRadius > Constants.tableHeight * 0.5f)
{
if (puck.position.X > Constants.goalWidth * 0.5f - Constants.puckRadius|| puck.position.X < -Constants.goalWidth * 0.5f + Constants.puckRadius)
{
puck.position.Y = Constants.tableHeight * 0.5f - Constants.puckRadius + epsilon;
puck.velocity.Y = -puck.velocity.Y * Constants.tableRestitution;
collision = true;
}
else if (puck.position.Y - Constants.puckRadius > Constants.tableHeight * 0.5f) // let the puck get inside the goal before showing the score.
{
return 0;
}
}
if (puck.position.Y - Constants.puckRadius < -Constants.tableHeight * 0.5f)
{
if (puck.position.X > Constants.goalWidth * 0.5f - Constants.puckRadius || puck.position.X < -Constants.goalWidth * 0.5f + Constants.puckRadius)
{
puck.position.Y = -Constants.tableHeight * 0.5f + Constants.puckRadius - epsilon;
puck.velocity.Y = -puck.velocity.Y * Constants.tableRestitution;
collision = true;
}
else if (puck.position.Y + Constants.puckRadius < -Constants.tableHeight * 0.5f) // let the puck get inside the goal before showing the score.
{
return 1;
}
}
return -1;
}
bool FindFirstContact(Paddle[] paddles, Puck puck, float deltaTime, out Contact contact, out int paddle)
{
contact = new Contact();
contact.time = float.PositiveInfinity;
contact.collisionType = PhysicsResult.NoCollision;
float contactTime;
Vector2 normal;
paddle = -1;
if(SweepCircles(puck.position, Constants.puckRadius, puck.velocity, paddles[0].position, Constants.paddleRadius, paddles[0].velocity, deltaTime, out contactTime, out normal))
{
contact.normal = normal;
contact.time = contactTime;
contact.restitution = Constants.paddleRestitution;
contact.relativeVelocity = puck.velocity - paddles[0].velocity;
contact.collisionType = PhysicsResult.PuckPaddleCollision;
paddle = 0;
}
if (SweepCircles(puck.position, Constants.puckRadius, puck.velocity, paddles[1].position, Constants.paddleRadius, paddles[1].velocity, deltaTime, out contactTime, out normal))
{
if (contactTime < contact.time)
{
contact.normal = normal;
contact.time = contactTime;
contact.restitution = Constants.paddleRestitution;
contact.relativeVelocity = puck.velocity - paddles[1].velocity;
contact.collisionType = PhysicsResult.PuckPaddleCollision;
paddle = 1;
}
}
if(SweepCircleEdge(puck.position.X, Constants.puckRadius, puck.velocity.X, -Constants.tableWidth * 0.5f, deltaTime, out contactTime))
{
if(contactTime < contact.time)
{
contact.normal = new Vector2(1, 0);
contact.time = contactTime;
contact.restitution = Constants.tableRestitution;
contact.relativeVelocity = puck.velocity;
contact.collisionType = PhysicsResult.PuckTableCollision;
}
}
if (SweepCircleEdge(puck.position.X, Constants.puckRadius, puck.velocity.X, Constants.tableWidth * 0.5f, deltaTime, out contactTime))
{
if (contactTime < contact.time)
{
contact.normal = new Vector2(-1, 0);
contact.time = contactTime;
contact.restitution = Constants.tableRestitution;
contact.relativeVelocity = puck.velocity;
contact.collisionType = PhysicsResult.PuckTableCollision;
}
}
// see if the the puck is going to hit a goal, if so don't sweep
float t = (-Constants.tableHeight * 0.5f + Constants.puckRadius - puck.position.Y) / puck.velocity.Y;
float x = puck.position.X + puck.velocity.X * t;
if (x > Constants.goalWidth * 0.5f - Constants.puckRadius || x < -Constants.goalWidth * 0.5f + Constants.puckRadius)
{
if (SweepCircleEdge(puck.position.Y, Constants.puckRadius, puck.velocity.Y, -Constants.tableHeight * 0.5f, deltaTime, out contactTime))
{
if (contactTime < contact.time)
{
contact.normal = new Vector2(0, 1);
contact.time = contactTime;
contact.restitution = Constants.tableRestitution;
contact.relativeVelocity = puck.velocity;
contact.collisionType = PhysicsResult.PuckTableCollision;
}
}
}
t = (Constants.tableHeight * 0.5f - Constants.puckRadius - puck.position.Y) / puck.velocity.Y;
x = puck.position.X + puck.velocity.X * t;
if (x > Constants.goalWidth * 0.5f - Constants.puckRadius || x < -Constants.goalWidth * 0.5f + Constants.puckRadius)
{
if (SweepCircleEdge(puck.position.Y, Constants.puckRadius, puck.velocity.Y, Constants.tableHeight * 0.5f, deltaTime, out contactTime))
{
if (contactTime < contact.time)
{
contact.normal = new Vector2(0, -1);
contact.time = contactTime;
contact.restitution = Constants.tableRestitution;
contact.relativeVelocity = puck.velocity;
contact.collisionType = PhysicsResult.PuckTableCollision;
}
}
}
if (contact.time <= deltaTime)
return true;
return false;
}
//player 0 is on bottom, player 1 on top
void ClampPaddlePosition(Paddle[] paddles, int player)
{
float radius = Constants.paddleRadius;
float epsilon = 0.0001f;
if (player == 0)
{
if (paddles[player].position.Y - radius * Constants.centerLineOverlap > 0)
{
paddles[player].position.Y = radius * Constants.centerLineOverlap + epsilon;
if (paddles[player].velocity.Y > 0)
paddles[player].velocity.Y = 0;
}
}
if (player == 1)
{
if (paddles[player].position.Y + radius * Constants.centerLineOverlap < 0)
{
paddles[player].position.Y = -radius * Constants.centerLineOverlap - epsilon;
if (paddles[player].velocity.Y < 0)
paddles[player].velocity.Y = 0;
}
}
if (paddles[player].position.X + radius > Constants.tableWidth * 0.5f)
{
paddles[player].position.X = Constants.tableWidth * 0.5f - radius + epsilon;
if (paddles[player].velocity.X > 0)
paddles[player].velocity.X = 0;
}
if (paddles[player].position.X - radius < -Constants.tableWidth * 0.5f)
{
paddles[player].position.X = -Constants.tableWidth * 0.5f + radius - epsilon;
if (paddles[player].velocity.X < 0)
paddles[player].velocity.X = 0;
}
if (paddles[player].position.Y + radius > Constants.tableHeight * 0.5f)
{
paddles[player].position.Y = Constants.tableHeight * 0.5f - radius + epsilon;
if (paddles[player].velocity.Y > 0)
paddles[player].velocity.Y = 0;
}
if (paddles[player].position.Y - radius < -Constants.tableHeight * 0.5f)
{
paddles[player].position.Y = -Constants.tableHeight * 0.5f + radius - epsilon;
if (paddles[player].velocity.Y < 0)
paddles[player].velocity.Y = 0;
}
}
public PhysicsResult Update(Puck puck, Paddle[] paddles, float deltaTime)
{
PhysicsResult result = PhysicsResult.NoCollision;
ClampPaddlePosition(paddles, 0);
ClampPaddlePosition(paddles, 1);
const float epsilon = 0.9990f; // don't actually touch
Contact contact;
int numIterations = 0; // to prevent infinite loops when squeezed
int paddle;
if (puck.velocity.GetLength() > Constants.maxPuckSpeed)
{
puck.velocity = Constants.maxPuckSpeed * puck.velocity / puck.velocity.GetLength();
}
while(FindFirstContact(paddles, puck, deltaTime, out contact, out paddle) && numIterations < 10)
{
// since the paddle is treated as almost infinite mass, the impules equations just becomes the reflection equation with some restitution.
result = contact.collisionType;
deltaTime -= contact.time;
puck.position += puck.velocity * (contact.time * epsilon);
paddles[0].position += paddles[0].velocity * (contact.time * epsilon);
paddles[1].position += paddles[1].velocity * (contact.time * epsilon);
if(paddle != -1) // TODO: keep this? prevents all overlap except is cases where the puck is squeezed between 2 objects.
paddles[paddle].velocity = new Vector2(0, 0);
float j = -(1.0f + contact.restitution) * Vector2.Dot(contact.relativeVelocity, contact.normal);
if (j > 0) // never move towards the collison object, should never happen but just in case.
{
puck.velocity += contact.normal * j;
}
if (puck.velocity.GetLength() > Constants.maxPuckSpeed)
{
puck.velocity = Constants.maxPuckSpeed * puck.velocity / puck.velocity.GetLength();
}
numIterations++;
}
puck.position += puck.velocity * deltaTime;
int p = PositionCorrection(puck, paddles);
if (p == 0)
return PhysicsResult.BottomPlayerScores;
if (p == 1)
return PhysicsResult.TopPlayerScores;
paddles[0].position += paddles[0].velocity * deltaTime;
paddles[1].position += paddles[1].velocity * deltaTime;
return result;
}
public LANGameOpponentPlayer()
{
port = 5555; //TODO: Move to constants or networkign or something...
receivingClient = new UdpClient();
receivingClient.Client.Bind(new IPEndPoint(IPAddress.Any, port));
receivingThread = new Thread(Receiver);
receivingThread.IsBackground = true;
receivingThread.Start();
paddle = new Paddle();
}
public virtual void Update(Paddle playerPaddle, Paddle opponentPadde, Puck puck, float deltaTime)
{
}
public override void Update(Paddle playerPaddle, Paddle opponentPadde, Puck puck, float deltaTime)
{
playerPaddle.velocity = (clientToView(mouseX(), mouseY()) - playerPaddle.position) / deltaTime;
}
public override void Update(Paddle playerPaddle, Paddle opponentPadde, Puck puck, float deltaTime)
{
playerPaddle.position = paddle.position;
playerPaddle.velocity = paddle.velocity;
}