/// <summary>
/// draws the bullet or its explosion animation
/// </summary>
/// <param name="spriteBatch">The sprite batch.</param>
public virtual void Draw(SpriteBatch spriteBatch)
{
//if bullet is not dead draw it, if it is draw its explosion
if (!IsDead)
{
//draw bullet
box = new Rectangle((int)Position.X, (int)Position.Y, (int)(Img.Width * scaleFactor), (int)(Img.Height * scaleFactor));
spriteBatch.Draw(Img, box, null, Color.White, -MathHelper.ToRadians(rotation) + MathHelper.PiOver2, new Vector2((float)(Img.Width / 2.0), (float)(Img.Height / 2.0)), SpriteEffects.None, 1f);
}
else
{
//draw the explosion animation
ExAnim.Draw(spriteBatch, Color.White, SpriteEffects.None);
}
}
/// <summary>
/// Updates the core state of the bullet.
/// </summary>
/// <returns><c>true</c> if the bullet should be removed from the game scene, <c>false</c> otherwise.</returns>
public virtual bool Update()
{
//move bullet if it is not dead update the explosion animation otherwise
if (!IsDead)
{
//calculate the bullet x and y move amount and add them onto the bullet position
Position += new Vector2((float)Math.Cos(MathHelper.ToRadians(rotation)), (float)-Math.Sin(MathHelper.ToRadians(rotation))) * DEF_VELOCITY;
}
else
{
//update the explosion animation
ExAnim.Update(Tools.GameTime);
}
//return true if the bullet is dead and done exploding or has left the screen, false otherwise
return(IsDead && !ExAnim.isAnimating || !Tools.IsBetween(Tools.ArenaBounds.Left, Position.X, Tools.ArenaBounds.Right + Img.Width) || !Tools.IsBetween(Tools.ArenaBounds.Bottom - Img.Height, Position.Y, Tools.ArenaBounds.Top));
}