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