+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Content;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace SuperPolarity
+{
+ class Actor
+ {
+ // Graphics / In-Game
+ protected Texture2D Texture;
+ protected Vector2 Origin;
+ public bool Active;
+
+ // Physical Properties
+ protected Vector2 Position;
+ protected Vector2 Velocity;
+ protected Vector2 Acceleration;
+ protected float Angle;
+
+ // Constraints / Behavior
+ protected float MaxVelocity;
+ protected float AccelerationRate;
+
+ public int Width
+ {
+ get { return Texture.Width; }
+ }
+
+ public int Height
+ {
+ get { return Texture.Height; }
+ }
+
+ public virtual void Initialize(ContentManager Content, Texture2D texture, Vector2 position)
+ {
+ Texture = texture;
+ Position = position;
+ Active = true;
+
+ Origin = new Vector2(Texture.Width / 2, Texture.Height / 2);
+ Velocity = new Vector2(0, 0);
+ Acceleration = new Vector2(0, 0);
+
+ MaxVelocity = 5;
+ AccelerationRate = 10;
+ }
+
+ public void AutoDeccelerate(GameTime gameTime)
+ {
+ if (Acceleration.X == 0 && Velocity.X > 0)
+ {
+ if (AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds > Velocity.X)
+ {
+ Velocity.X = 0;
+ Acceleration.X = 0;
+ }
+ else
+ {
+ Acceleration.X = -AccelerationRate;
+ }
+ }
+
+ if (Acceleration.X == 0 && Velocity.X < 0)
+ {
+ if (-AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds < Velocity.X)
+ {
+ Velocity.X = 0;
+ Acceleration.X = 0;
+ }
+ else
+ {
+ Acceleration.X = AccelerationRate;
+ }
+ }
+
+ if (Acceleration.Y == 0 && Velocity.Y > 0)
+ {
+ if (AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds > Velocity.Y)
+ {
+ Velocity.Y = 0;
+ Acceleration.Y = 0;
+ }
+ else
+ {
+ Acceleration.Y = -AccelerationRate;
+ }
+ }
+
+ if (Acceleration.Y == 0 && Velocity.Y < 0)
+ {
+ if (-AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds < Velocity.Y)
+ {
+ Velocity.Y = 0;
+ Acceleration.Y = 0;
+ }
+ else
+ {
+ Acceleration.Y = AccelerationRate;
+ }
+ }
+ }
+
+ public virtual void Update(GameTime gameTime)
+ {
+ Move(gameTime);
+ ChangeAngle();
+ }
+
+ public void Move(GameTime gameTime)
+ {
+ AutoDeccelerate(gameTime);
+
+ Velocity.X = Velocity.X + Acceleration.X * (float)gameTime.ElapsedGameTime.TotalSeconds;
+ Velocity.Y = Velocity.Y + Acceleration.Y * (float)gameTime.ElapsedGameTime.TotalSeconds;
+
+ if (Velocity.X > MaxVelocity)
+ {
+ Velocity.X = MaxVelocity;
+ }
+
+ if (Velocity.X < -MaxVelocity)
+ {
+ Velocity.X = -MaxVelocity;
+ }
+
+ if (Velocity.Y > MaxVelocity)
+ {
+ Velocity.Y = MaxVelocity;
+ }
+
+ if (Velocity.Y < -MaxVelocity)
+ {
+ Velocity.Y = -MaxVelocity;
+ }
+
+ Position.X = Position.X + Velocity.X;
+ Position.Y = Position.Y + Velocity.Y;
+ }
+
+ public void ChangeAngle()
+ {
+ Angle = (float)Math.Atan2(Velocity.Y, Velocity.X);
+ }
+
+ public virtual void Draw(SpriteBatch spriteBatch)
+ {
+ spriteBatch.Draw(Texture, Position, null, Color.White, Angle, Origin, 1f, SpriteEffects.None, 0f);
+ }
+ }
+}