/// <summary>
/// Manage movement for a variable speed
/// Jump also activated here, but only on Land
/// </summary>
/// <param name="speed"></param>
public void Move(int speed)
{
if (InputManager.GetButton("Right") && !CollRight.CollidingWith <Platform>())
{
Velocity.X = speed;
SpriteFX = SpriteEffects.FlipHorizontally;
direction = Direction.Right;
}
else if (InputManager.GetButton("Left") && !CollLeft.CollidingWith <Platform>())
{
Velocity.X = -speed;
SpriteFX = SpriteEffects.None;
direction = Direction.Left;
}
else
{
Velocity.X = 0;
}
//Handle jumping, but ONLY on land
if (InputManager.GetButtonDown("Jump") && state == PlayerState.OnLand)
{
state = PlayerState.InAir;
//Start pulling the player down
Acceleration = airAcceleration;
//But give them an initial upward velocity
Velocity = jumpVelocity;
//Play a sound effect
GameManager.PlaySFX("Jump");
}
}
/// <summary>
/// Clear all the collisions for each collider
/// </summary>
protected override void ClearCollisions()
{
base.ClearCollisions();
CollAbove.ResetCollider();
CollBelow.ResetCollider();
CollLeft.ResetCollider();
CollRight.ResetCollider();
CollCenter.ResetCollider();
}
public override void Update(GameTime gameTime)
{
//Update the rest of the colliders as well
CollAbove.Update(gameTime);
CollBelow.Update(gameTime);
CollLeft.Update(gameTime);
CollRight.Update(gameTime);
base.Update(gameTime);
}
/// <summary>
/// Finds the distance between enemy and player and advances toward player
/// Once player exits range method ends
/// </summary>
public void ChasePlayer()
{
if (!CollBelow.CollidingWith <Platform>())
{
return;
}
GameObject player = GameManager.Get("Current");
//store the distance between
int distX = player.Location.X - this.Location.X;
int distY = player.Location.Y - this.Location.Y;
//Check to see if player is within range
//This checks to see if player is within a 200x200 square around the enemy
if (Math.Abs(distX) <= MAX_DETECTION || Math.Abs(distY) <= MAX_DETECTION)
{
//Check if to the left or right of the player, set speed to player direction and move
if (distX < 0 && !CollLeft.CollidingWith <Platform>())
{
direction = Direction.Left;
SetSpeed();
}
else if (distX > 0 && !CollRight.CollidingWith <Platform>())
{
direction = Direction.Right;
SetSpeed();
}
else
{
return;
}
Location.X += (int)Speed;
if (Speed <= 0)
{
SpriteFX = SpriteEffects.FlipHorizontally;
}
else
{
SpriteFX = SpriteEffects.None;
}
}
}
/// <summary>
/// Swim Update
/// </summary>
public void Swim(int speed)
{
int horz = 0;
int vert = 0;
if (InputManager.GetButton("Right"))
{
horz = 1;
SpriteFX = SpriteEffects.FlipHorizontally;
direction = Direction.Right;
}
if (InputManager.GetButton("Left"))
{
horz = -1;
SpriteFX = SpriteEffects.None;
direction = Direction.Left;
}
if (InputManager.GetButton("Up"))
{
vert = 1;
}
if (InputManager.GetButton("Down"))
{
vert = -1;
}
if (horz != 0 || vert != 0)
{
Velocity = new Vector2(horz * speed, -vert * speed);
}
//Check for collisions and stop appropriate component of velocity while swimming
if (CollLeft.CollidingWith <Platform>() && Velocity.X < 0)
{
Velocity.X = 0;
}
if (CollRight.CollidingWith <Platform>() && Velocity.X > 0)
{
Velocity.X = 0;
}
if (CollAbove.CollidingWith <Platform>() && Velocity.Y < 0)
{
Velocity.Y = 0;
}
if (CollBelow.CollidingWith <Platform>() && Velocity.Y > 0)
{
Velocity.Y = 0;
}
//Exit swimming state when not colliding with any water objects
//Done here rather than in HandleCollision events because there
//will be a lot of water tiles near each other.
if (!Coll.CollidingWith <Water>())
{
state = PlayerState.InAir;
Acceleration = airAcceleration;
if (Velocity.Y <= 0)
{
Velocity.Y = .5f * jumpVelocity.Y;
}
//Turn back to normal color
DrawColor = Color.White;
//Stop ambient swim noise
GameManager.StopSFX("WaterLoop");
}
}
/// <summary>
/// Has enemy move back and forth in a time interval
/// </summary>
/// <param name="gameTime"></param>
public void Wander(GameTime gameTime)
{
TotalElapsedSeconds += gameTime.ElapsedGameTime.TotalSeconds;
if (TotalElapsedSeconds >= MoveChangeTime || !CollBelow.CollidingWith <Platform>() || (Speed > 0 && CollRight.CollidingWith <Platform>()) || (Speed < 0 && CollLeft.CollidingWith <Platform>()))
{
TotalElapsedSeconds -= MoveChangeTime;
ChangeDirection();
SetSpeed();
}
this.Location.X += (int)Speed;
if (Speed <= 0)
{
SpriteFX = SpriteEffects.FlipHorizontally;
}
else
{
SpriteFX = SpriteEffects.None;
}
}
