MonoGame.Samples/HoneycombRush/Objects/SoldierBee.cs

#region File Description
//-----------------------------------------------------------------------------
// SoldierBee.cs
//
// Microsoft XNA Community Game Platform
// Copyright (C) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#endregion

#region Using Statements


using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;


#endregion

namespace HoneycombRush
{
    /// <summary>
    /// This is a game component that implements IUpdateable.
    /// </summary>
    public class SoldierBee : Bee
    {
        #region Fields/Properties


        protected float chaseDistance = 70f;
        bool isChaseMode = false;

        public float DistanceFromBeeKeeper { get; set; }

        public Vector2 BeeKeeperVector { get; set; }

        protected override int MaxVelocity
        {
            get
            {
                return (int)ConfigurationManager.ModesConfiguration[
                    ConfigurationManager.DifficultyMode.Value].MaxSoldierBeeVelocity;
            }
        }

        protected override float AccelerationFactor
        {
            get
            {
                return 20;
            }
        }


        #endregion

        #region Initialization


        /// <summary>
        /// Creates a new soldier bee instance.
        /// </summary>
        /// <param name="game">Associated game object.</param>
        /// <param name="gamePlayScreen">Gameplay screen where the bee will appear.</param>
        /// <param name="beehive">The bee's associated beehive.</param>
        public SoldierBee(Game game, GameplayScreen gamePlayScreen, Beehive beehive)
            : base(game, gamePlayScreen, beehive)
        {
            AnimationKey = "SoldierBee";
        }

        /// <summary>
        /// Loads the content used by this component.
        /// </summary>
        protected override void LoadContent()
        {
            texture = Game.Content.Load<Texture2D>("Textures/SoldierBeeWingFlap");

            base.LoadContent();
        }


        #endregion

        #region Update


        /// <summary>
        /// Updates the component.
        /// </summary>
        /// <param name="gameTime">Game time information.</param>
        public override void Update(GameTime gameTime)
        {
            if (!gamePlayScreen.IsActive)
            {
                base.Update(gameTime);
                return;
            }

            // If the bee was hit by smoke use the base behavior
            if (isHitBySmoke)
            {
                base.Update(gameTime);
                // Bee can not chase when it has been hit by smoke
                isChaseMode = false;
            }
            else
            {
                // The bee is chasing the beekeeper
                if (isChaseMode)
                {
                    // Move the bee closer to the beekeeper
                    velocity = BeeKeeperVector / AccelerationFactor;
                    position += velocity;
                    AnimationDefinitions[AnimationKey].Update(gameTime, true);

                    // The chase is over
                    if (DistanceFromBeeKeeper <= 10f)
                    {
                        isChaseMode = false;
                        SetStartupPosition();
                    }
                }
                else
                {
                    // If close enough, start chasing
                    if (DistanceFromBeeKeeper != 0f && DistanceFromBeeKeeper <= chaseDistance)
                    {
                        isChaseMode = true;
                    }
                    else
                    {
                        base.Update(gameTime);
                    }
                }
            }            
        }


        #endregion
    }
}