git.r.bdr.sh - rbdr/super-polarity/blob - Super Polarity/Actors/Actor.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Text;
   5 using Microsoft.Xna.Framework;
   6 using Microsoft.Xna.Framework.Content;
   7 using Microsoft.Xna.Framework.Graphics;
   8
   9 namespace SuperPolarity
  10 {
  11     class Actor
  12     {
  13         protected Game game;
  14
  15         // Graphics / In-Game
  16         protected Texture2D Texture;
  17         protected Vector2 Origin;
  18         public bool Active;
  19
  20         // Physical Properties
  21         public Vector2 Position;
  22         protected Vector2 Velocity;
  23         protected Vector2 Acceleration;
  24         protected float Angle;
  25
  26         // Constraints / Behavior
  27         protected float MaxVelocity;
  28         protected float AccelerationRate;
  29
  30         public int Width
  31         {
  32             get { return Texture.Width; }
  33         }
  34
  35         public int Height
  36         {
  37             get { return Texture.Height; }
  38         }
  39
  40         public Actor(Game newGame)
  41         {
  42             game = newGame;
  43         }
  44
  45         public virtual void Initialize(Texture2D texture, Vector2 position)
  46         {
  47             Texture = texture;
  48             Position = position;
  49             Active = true;
  50
  51             Origin = new Vector2(Texture.Width / 2, Texture.Height / 2);
  52             Velocity = new Vector2(0, 0);
  53             Acceleration = new Vector2(0, 0);
  54
  55             MaxVelocity = 5;
  56             AccelerationRate = 10;
  57         }
  58
  59         public void AutoDeccelerate(GameTime gameTime)
  60         {
  61             if (Acceleration.X == 0 && Velocity.X > 0)
  62             {
  63                 if (AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds > Velocity.X)
  64                 {
  65                     Velocity.X = 0;
  66                     Acceleration.X = 0;
  67                 }
  68                 else
  69                 {
  70                     Acceleration.X = -AccelerationRate;
  71                 }
  72             }
  73
  74             if (Acceleration.X == 0 && Velocity.X < 0)
  75             {
  76                 if (-AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds < Velocity.X)
  77                 {
  78                     Velocity.X = 0;
  79                     Acceleration.X = 0;
  80                 }
  81                 else
  82                 {
  83                     Acceleration.X = AccelerationRate;
  84                 }
  85             }
  86
  87             if (Acceleration.Y == 0 && Velocity.Y > 0)
  88             {
  89                 if (AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds > Velocity.Y)
  90                 {
  91                     Velocity.Y = 0;
  92                     Acceleration.Y = 0;
  93                 }
  94                 else
  95                 {
  96                     Acceleration.Y = -AccelerationRate;
  97                 }
  98             }
  99
 100             if (Acceleration.Y == 0 && Velocity.Y < 0)
 101             {
 102                 if (-AccelerationRate * gameTime.ElapsedGameTime.TotalSeconds < Velocity.Y)
 103                 {
 104                     Velocity.Y = 0;
 105                     Acceleration.Y = 0;
 106                 }
 107                 else
 108                 {
 109                     Acceleration.Y = AccelerationRate;
 110                 }
 111             }
 112         }
 113
 114         public virtual void Update(GameTime gameTime)
 115         {
 116             Move(gameTime);
 117             ChangeAngle();
 118         }
 119
 120         public void Move(GameTime gameTime)
 121         {
 122             AutoDeccelerate(gameTime);
 123
 124             Velocity.X = Velocity.X + Acceleration.X * (float)gameTime.ElapsedGameTime.TotalSeconds;
 125             Velocity.Y = Velocity.Y + Acceleration.Y * (float)gameTime.ElapsedGameTime.TotalSeconds;
 126
 127             if (Velocity.X > MaxVelocity)
 128             {
 129                 Velocity.X = MaxVelocity;
 130             }
 131
 132             if (Velocity.X < -MaxVelocity)
 133             {
 134                 Velocity.X = -MaxVelocity;
 135             }
 136
 137             if (Velocity.Y > MaxVelocity)
 138             {
 139                 Velocity.Y = MaxVelocity;
 140             }
 141
 142             if (Velocity.Y < -MaxVelocity)
 143             {
 144                 Velocity.Y = -MaxVelocity;
 145             }
 146
 147             Position.X = Position.X + Velocity.X;
 148             Position.Y = Position.Y + Velocity.Y;
 149         }
 150
 151         public void ChangeAngle()
 152         {
 153             Angle = (float)Math.Atan2(Velocity.Y, Velocity.X);
 154         }
 155
 156         public virtual void Draw(SpriteBatch spriteBatch)
 157         {
 158             spriteBatch.Draw(Texture, Position, null, Color.White, Angle, Origin, 1f, SpriteEffects.None, 0f);
 159         }
 160     }
 161 }