git.r.bdr.sh - rbdr/super-polarity/blob - SuperPolarity/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 bool Flashing;
  16         protected int ChangeRate;
  17         protected int CurrentTime;
  18         public int AngleChangeProbability;
  19         protected int BouncePadding;
  20         protected float RotationFactor;
  21         protected Random Random;
  22         protected bool AddingAngle;
  23
  24         public StandardShip(SuperPolarity newGame) : base(newGame) {}
  25
  26         public override void  Initialize(Texture2D texture, Vector2 position)
  27         {
  28             base.Initialize(texture, position);
  29
  30             var cryptoResult = new byte[4];
  31             new RNGCryptoServiceProvider().GetBytes(cryptoResult);
  32
  33             ChangeRate = 50;
  34                         AngleChangeProbability = 50;
  35             BouncePadding = 0;
  36                         MaxVelocity = 3;
  37             CurrentTime = 0;
  38             RotationFactor = (float) (3 * Math.PI / 180);
  39             Random = new Random(BitConverter.ToInt32(cryptoResult, 0));
  40             AddingAngle = true;
  41         }
  42
  43         public override void Magnetize(Ship ship, float distance, float angle)
  44         {
  45             if (ship.GetType() == typeof(MainShip)) {
  46                 base.Magnetize(ship, distance, angle);
  47             }
  48         }
  49
  50         public override void Update(GameTime gameTime)
  51         {
  52             CurrentTime += gameTime.ElapsedGameTime.Milliseconds;
  53             if (!Magnetizing)
  54             {
  55                 AutoMove();
  56                 BounceBack();
  57             }
  58             ChangeAngle();
  59             Position += Velocity;
  60             UpdateBox();
  61             Magnetizing = false;
  62
  63             if (Flashing)
  64             {
  65                 Color = new Color(255, 255, 255, 128);
  66                 Flashing = false;
  67             }
  68             else
  69             {
  70                 Color = Color.White;
  71             }
  72         }
  73
  74         protected void AutoMove()
  75         {
  76             float newAngle = Angle;
  77
  78             if (CurrentTime < ChangeRate)
  79             {
  80                 return;
  81             }
  82
  83             if (Random.Next(AngleChangeProbability) == 2)
  84             {
  85                 AddingAngle = !AddingAngle;
  86             }
  87
  88             CurrentTime = 0;
  89
  90             if (AddingAngle)
  91             {
  92                 newAngle += (float) ( Random.NextDouble() * RotationFactor);
  93             }
  94             else
  95             {
  96                 newAngle -= (float) (Random.NextDouble() * RotationFactor);
  97             }
  98
  99             Velocity.X = (float) (MaxVelocity * Math.Cos(newAngle));
 100             Velocity.Y = (float) (MaxVelocity * Math.Sin(newAngle));
 101         }
 102
 103         protected void BounceBack()
 104         {
 105             if (Position.X + Width < -BouncePadding && Velocity.X < 0)
 106             {
 107                 Velocity.X = -Velocity.X;
 108             }
 109
 110             if (Position.Y + Height < -BouncePadding && Velocity.Y < 0)
 111             {
 112                 Velocity.Y = -Velocity.Y;
 113             }
 114
 115             if (Position.X > game.GraphicsDevice.Viewport.Width +  BouncePadding && Velocity.X > 0)
 116             {
 117                 Velocity.X = -Velocity.X;
 118             }
 119
 120             if (Position.Y > game.GraphicsDevice.Viewport.Height + BouncePadding && Velocity.Y > 0)
 121             {
 122                 Velocity.Y = -Velocity.Y;
 123             }
 124         }
 125
 126         public override void Collide(Actor other, Rectangle collision)
 127         {
 128             if (Dying)
 129             {
 130                 return;
 131             }
 132
 133             if (other.GetType() == typeof(MainShip))
 134             {
 135                 Die();
 136                 return;
 137             }
 138
 139             if (other.GetType() == typeof(Bullet))
 140             {
 141                 var theBullet = (Bullet)other;
 142                 TakeDamage(theBullet.Power);
 143                 Flashing = true;
 144             }
 145         }
 146
 147         protected override void Die()
 148         {
 149             ActorManager.CheckOut(this);
 150             Renderer.CheckOut(this);
 151             game.Player.AddScore(Value);
 152             game.Player.AddMultiplier(1);
 153         }
 154     }
 155 }