git.r.bdr.sh - rbdr/super-polarity/blob - Super Polarity/Actors/StandardShip.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.Graphics;
   7 using Microsoft.Xna.Framework.Content;
   8 using System.Security.Cryptography;
   9
  10 namespace SuperPolarity
  11 {
  12     class StandardShip : Ship
  13     {
  14
  15         protected int ChangeRate;
  16         protected int CurrentTime;
  17         protected int AngleChangeProbability;
  18         protected int BouncePadding;
  19         protected float RotationFactor;
  20         protected Random Random;
  21         protected bool AddingAngle;
  22
  23         public StandardShip(Game newGame) : base(newGame) {}
  24
  25         public override void  Initialize(Texture2D texture, Vector2 position)
  26         {
  27             base.Initialize(texture, position);
  28
  29             var cryptoResult = new byte[4];
  30             new RNGCryptoServiceProvider().GetBytes(cryptoResult);
  31
  32             ChangeRate = 50;
  33             AngleChangeProbability = 50;
  34             BouncePadding = 0;
  35             MaxVelocity = 1;
  36             CurrentTime = 0;
  37             RotationFactor = (float) (3 * Math.PI / 180);
  38             Random = new Random(BitConverter.ToInt32(cryptoResult, 0));
  39             AddingAngle = true;
  40         }
  41
  42         public override void Magnetize(Ship ship, float distance, float angle)
  43         {
  44             if (ship.GetType() == typeof(MainShip)) {
  45                 base.Magnetize(ship, distance, angle);
  46             }
  47         }
  48
  49         public override void Update(GameTime gameTime)
  50         {
  51             CurrentTime += gameTime.ElapsedGameTime.Milliseconds;
  52             if (!Magnetizing)
  53             {
  54                 AutoMove();
  55                 BounceBack();
  56             }
  57             ChangeAngle();
  58             Position += Velocity;
  59             Magnetizing = false;
  60         }
  61
  62         protected void AutoMove()
  63         {
  64             float newAngle = Angle;
  65
  66             if (CurrentTime < ChangeRate)
  67             {
  68                 return;
  69             }
  70
  71             if (Random.Next(AngleChangeProbability) == 2)
  72             {
  73                 AddingAngle = !AddingAngle;
  74             }
  75
  76             CurrentTime = 0;
  77
  78             if (AddingAngle)
  79             {
  80                 newAngle += (float) ( Random.NextDouble() * RotationFactor);
  81             }
  82             else
  83             {
  84                 newAngle -= (float) (Random.NextDouble() * RotationFactor);
  85             }
  86
  87             Velocity.X = (float) (MaxVelocity * Math.Cos(newAngle));
  88             Velocity.Y = (float) (MaxVelocity * Math.Sin(newAngle));
  89         }
  90
  91         protected void BounceBack()
  92         {
  93             if (Position.X + Width < -BouncePadding && Velocity.X < 0)
  94             {
  95                 Velocity.X = -Velocity.X;
  96             }
  97
  98             if (Position.Y + Height < -BouncePadding && Velocity.Y < 0)
  99             {
 100                 Velocity.Y = -Velocity.Y;
 101             }
 102
 103             if (Position.X > game.GraphicsDevice.Viewport.Width +  BouncePadding && Velocity.X > 0)
 104             {
 105                 Velocity.X = -Velocity.X;
 106             }
 107
 108             if (Position.Y > game.GraphicsDevice.Viewport.Height + BouncePadding && Velocity.Y > 0)
 109             {
 110                 Velocity.Y = -Velocity.Y;
 111             }
 112         }
 113     }
 114 }