/// <summary>
/// Allows the game component to update itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update(GameTime gameTime)
{
float turnAmount = .04f;
ParticleManager.Instance().ParticleSystems["ghost" + ghostNum].Update(.1f);
switch (this.ghostState)
{
case GhostState.Dead:
//TODO Dead moving and dead animation.
//Until then
this.ghostState = GhostState.Roving;
//Pick random direction
Random r = new Random();
Vector2 v = new Vector2((float)r.NextDouble() - 0.5f, (float)r.NextDouble() - 0.5f);
Vector2.Normalize(ref v, out v); //Normalize
this.Direction = v; //Assign random direction
break;
case GhostState.Chasing:
//Change texture if Chasing
if (!(this.spriteTexture == this.ghost))
{
//gameConsole.GameConsoleWrite(this.ToString() + " Chasing changed texture to spriteTexture");
this.spriteTexture = this.ghost;
}
if (pacMan.Location.Y > this.Location.Y)
{
//this.Direction.Y = 1;
this.Direction.Y = MathHelper.Clamp(this.Direction.Y += turnAmount, -1, 1);
}
else
{
//this.Direction.Y = -1;
this.Direction.Y = MathHelper.Clamp(this.Direction.Y -= turnAmount, -1, 1);
}
if (pacMan.Location.X > this.Location.X)
{
//this.Direction.X = 1;
this.Direction.X = MathHelper.Clamp(this.Direction.X += turnAmount, -1, 1);
}
else
{
//this.Direction.X = -1;
this.Direction.X = MathHelper.Clamp(this.Direction.X -= turnAmount, -1, 1);
}
break;
case GhostState.Evading:
//Change texture if evading
if (this.spriteTexture != this.ghostHit)
{
//gameConsole.GameConsoleWrite(this.ToString() + " Evading changed texture to ghostHit");
this.spriteTexture = this.ghostHit;
}
if (pacMan.Location.Y > this.Location.Y)
{
this.Direction.Y = -1;
}
else
{
this.Direction.Y = 1;
}
if (pacMan.Location.X > this.Location.X)
{
this.Direction.X = -1;
}
else
{
this.Direction.X = -1;
}
ParticleManager.Instance().ParticleSystems["ghost" + ghostNum].AddParticles(
new Vector2(this.Location.X + this.LocationRect.Width / 2,
this.Location.Y + this.LocationRect.Height / 2),
Vector2.Zero);
break;
case GhostState.Roving:
//Change texture if Chasing
if (!(this.spriteTexture == this.ghost))
{
//gameConsole.GameConsoleWrite(this.ToString() + " Roving changed texture to spriteTexture");
this.spriteTexture = this.ghost;
}
//check if ghost can see pacman
Vector2 normD = Vector2.Normalize(this.Direction);
Vector2 p = new Vector2(this.Location.X, this.Location.Y);
while (p.X < graphics.GraphicsDevice.Viewport.Width &&
p.X > 0 &&
p.Y < graphics.GraphicsDevice.Viewport.Height &&
p.Y > 0)
{
if (pacMan.LocationRect.Contains(new Point((int)p.X, (int)p.Y)))
{
this.ghostState = GhostState.Chasing;
gameConsole.GameConsoleWrite(this.ToString() + " saw pacman");
break;
}
p += this.Direction;
}
break;
}
//Borders
if ((this.Location.Y + this.spriteTexture.Height / 2 > graphics.GraphicsDevice.Viewport.Height)
||
(this.Location.Y - this.spriteTexture.Height / 2 < 0)
)
{
this.Direction.Y *= -1;
//this.ghostState = GhostState.Roving;
}
if ((this.Location.X + this.spriteTexture.Width / 2 > graphics.GraphicsDevice.Viewport.Width)
||
(this.Location.X - this.spriteTexture.Width / 2 < 0)
)
{
this.Direction.X *= -1;
//this.ghostState = GhostState.Roving;
}
Location += ((this.Direction * (lastUpdateTime / 1000)) * Speed); //Simple Move
//Collision
if (this.Intersects(pacMan))
{
//PerPixel Collision
if (this.PerPixelCollision(pacMan))
{
if (this.ghostState == GhostState.Evading)
{
this.Visible = false;
this.Enabled = false;
}
else
{
if (pacMan.PacManState != PacManState.Dying)
{
pacMan.Die();
this.Location = new Vector2(100, 100);
this.ghostState = GhostState.Roving;
}
}
}
}
base.Update(gameTime);
}
