Arrive

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System;

namespace AICatMouse
{
    class AgentSprites : Sprites
    {
        static string spriteName = "cat";
        static float linearVelocity = .125f;
        float maxLinearVelocity = .4f;
        float timeToTarget = .5f;
        float distance;
        Vector2 playerDistance;
        float radius = 56;
        float arrivalRadius = 16;
        Vector2 normalizedDistance;
        bool isCaught = false;
        Game ASgame;
        UserSprites user;
        public AgentSprites(Game game, SpriteBatch spriteBatch, UserSprites player) : base(game, spriteBatch, spriteName, linearVelocity)
        {
            ASgame = game;
            user = player;
        }

        public override void Update(GameTime gameTime)
        {
            //Velocity and distance
            playerDistance = new Vector2(user.Position.X - base.Position.X, user.Position.Y - base.Position.Y);
            distance = Vector2.Distance(user.Position, base.Position);

            //If cat is in slow area
            if (Math.Abs(distance) < radius)
            {
                base.Velocity = (base.Velocity * distance / radius) / timeToTarget;
                base.Position += base.Velocity;
            }
            else
            {
                normalizedDistance = playerDistance;
                normalizedDistance.Normalize();
                normalizedDistance *= maxLinearVelocity;
                base.Velocity = normalizedDistance;
                base.Position += base.Velocity * gameTime.ElapsedGameTime.Milliseconds;
            }

            //If cat arrived
            if (Math.Abs(distance) < arrivalRadius)
            {
                isCaught = true;
                Position += Vector2.Zero;
            }

            base.Update(gameTime);
        }

        public bool Caught
        {
            get
            {
                return isCaught;
            }
            set
            {
                isCaught = value;
            }
        }
    }
}