private void RacingBehaviour()//Vector maths for piranha swimming towards chicken leg
{
//Standard tokenposition converstion to a vector
Vector3 tokenPosition = this.PossessedToken.Position;
//Passes through the position of the chicken leg to the Piranha
mFeedingPosition = tokenPosition - mAquarium.ChickenLeg.Position;
//Vector normalisation to prevent piranha swimming off of the stage in one game tick
mFeedingPosition.Normalize();
//Movement towards the chicken leg
tokenPosition = tokenPosition - mFeedingPosition * mSpeedX;
//Reassigns values after calculations have been completed
this.PossessedToken.Position = tokenPosition;
//Two bools check for the X and Y axis to check piranha position relative to the ChickenLeg
//X bool positional check
if (tokenPosition.X - mAquarium.ChickenLeg.Position.X <= 3 && tokenPosition.X - mAquarium.ChickenLeg.Position.X >= -3)
{
checkLegX = true;
}
//Y bool positional check
if (tokenPosition.Y - mAquarium.ChickenLeg.Position.Y <= 3 && tokenPosition.Y - mAquarium.ChickenLeg.Position.Y >= -3)
{
checkLegY = true;
}
//If both bools return true - then leg is set to null, and bools are reset
if (checkLegX && checkLegY == true)
{
//Adds score to the winning team of that round
if (teamNumber == 1)
{
//Adds one to team ones score
team_1_Score += 1;
}
else if (teamNumber == 2)
{
//Adds one to team twos score
team_2_Score += 1;
}
//Reset code
//Removes Chicken Leg from scene
mAquarium.RemoveChickenLeg();
//Resets bool checks for position of pirahna in relation to chicken leg
checkLegX = false;
checkLegY = false;
// Sets the fish to inactive
active = false;
//Selects the next Piranha that plays
PiranhaPlayer();
//Prints out the score of each team
Console.WriteLine("Team 1 score = {0}", team_1_Score);
Console.WriteLine("Team 2 score = {0}", team_2_Score);
}
}
/// <summary>
/// AI Update method.
/// </summary>
/// <param name="pGameTime">Game time</param>
public override void Update(ref GameTime pGameTime)
{
if (firstUpdate)
{
// Randomise the point the fish will start on along the sin/cos circle
currentSin += rand.Next(0, 101);
currentSin /= 100;
// Face the fish towards the center of the screen
if ((PossessedToken as PiranhaToken).TeamNum == 1)
{
facingDirectionX = -1;
}
else
{
facingDirectionX = 1;
// Invert the direction the fish swims along the sin/cos circle
sinIncrement *= -1;
}
PossessedToken.Orientation = new Vector3(facingDirectionX, PossessedToken.Orientation.Y, PossessedToken.Orientation.Z);
firstUpdate = false;
}
tokenPosition = PossessedToken.Position; // Store the current position of the bubble
// The game has ended and this fish is on the winning team
if (swimming)
{
// Continue swimming off the edge of the screen
tokenPosition.X += speed;
speed += speedIncrease;
}
// If the chicken leg is in the aquarium
else if (seeking)
{
// Get direction from the token to the chicken leg
Vector2 direction = new Vector2(chickenLegPosition.X - tokenPosition.X, chickenLegPosition.Y - tokenPosition.Y);
if (direction.Length() <= radius) // If token has reached the chicken leg
{
if (aquarium.ChickenLeg != null)
{
aquarium.RemoveChickenLeg();
full = true;
}
}
else
{
// Normalise direction, calculating how far to move this frame
direction = Vector2.Normalize(direction);
direction *= speed;
// Move towards the chicken leg
tokenPosition += new Vector3(direction.X, direction.Y, 0);
}
}
else if (returning)
{
// Get direction from the token to its original position
Vector2 direction = new Vector2(originalPosition.X - tokenPosition.X, originalPosition.Y - tokenPosition.Y);
if (direction.Length() <= speed) // If token would step over its original position on this update
{
// Set the token back to its default pattern
// Reset the token's position
tokenPosition = originalPosition;
facingDirectionX *= -1;
PossessedToken.Orientation = new Vector3(facingDirectionX, PossessedToken.Orientation.Y, PossessedToken.Orientation.Z);
returning = false;
}
else
{
// Normalise direction, calculating how far to move this frame
direction = Vector2.Normalize(direction);
direction *= speed;
// Move towards the token's original position
tokenPosition += new Vector3(direction.X, direction.Y, 0);
}
}
else
{
tokenPosition.X += ((float)Math.Sin(currentSin) * sinIntensity); // Move the bubble in a sine pattern along the X axis
tokenPosition.Y += ((float)Math.Cos(currentSin) * sinIntensity); // Move the bubble in a cosine pattern along the y axis
currentSin += sinIncrement; // Increase the evolution of the sin/cos pattern
}
PossessedToken.Position = tokenPosition; // Set the token's current position to the new one, after all movements
}
