Dogcows Code - chaz/carfire/blob - CarFire/CarFire/CharacterTestBed/Projectile.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 using Microsoft.Xna.Framework.Input;
   9
  10 namespace CarFire
  11 {
  12     /// <summary>
  13     /// This class represents a projectile object that will be spawned whenever a player or a monster fires.
  14     /// </summary>
  15     public class Projectile
  16     {
  17         //Member Variables
  18         Map theMap;
  19         Vector2 velocity;
  20         Texture2D projectileModel;
  21         int damage;
  22         int gridX;
  23         int gridY;
  24         //The pixel position should be the pixel position on the map.  When a projectile is drawn
  25         //these will have to be transformed to the coordinate system that the drawable screen is using.
  26         int pixelX;
  27         int pixelY;
  28
  29         /// <summary>
  30         /// The Constructor for a projectile object.
  31         /// </summary>
  32         /// <param name="_currentMap">The map that this character will interact with</param>
  33         /// <param name="_projectileModel">The model for this projectile</param>
  34         /// <param name="_velocity">How fast the projectile moves</param>
  35         /// <param name="_gridX">The starting X position in the map grid</param>
  36         /// <param name="_gridY">The starting Y position in the map grid</param>
  37         /// <param name="_pixelX">The absolute X pixel position on the map</param>
  38         /// <param name="_pixelY"> The absolute Y pixel position on the map</param>
  39         public Projectile(Map _currentMap,
  40                             Texture2D _projectileModel,
  41                             Vector2 _velocity,
  42                             int _gridX,
  43                             int _gridY,
  44                             int _pixelX,
  45                             int _pixelY)
  46         {
  47             theMap = _currentMap;
  48             projectileModel = _projectileModel;
  49             velocity = _velocity;
  50             gridX = _gridX;
  51             gridY = _gridY;
  52             pixelX = _pixelX;
  53             pixelY = _pixelY;
  54         }
  55         public void Update()
  56         {
  57             //See if something moved onto this projectile.
  58             if(theMap.isOpenSquare(gridX, gridY))
  59             {
  60                 theMap.damageSquare(gridX, gridY, damage);
  61             }
  62             //If the projectile will be moving to a new grid position we need to check to see if it is occupied.
  63             if ((int)((pixelX + velocity.X) / theMap.gridToPixelRatio) != gridX || (int)((pixelY + velocity.Y) / Map.gridToPixelRatio) != gridY)
  64             {
  65                 bool open = theMap.isOpenSquare((pixelX + velocity.X) / theMap.gridToPixelRatio, (pixelY + velocity.Y) / Map.gridToPixelRatio);
  66                 //If open just move this projectile there
  67                 //***Map doesn't need to know that this projectile is there because players/monsters are allowed
  68                 // to move into the path of projectiles.
  69                 if (open)
  70                 {
  71                     pixelX += (int)velocity.X;
  72                     pixelY += (int)velocity.Y;
  73                     gridX = pixelX / theMap.gridToPixelRatio;
  74                     gridY = pixelY / theMap.gridToPixelRatio;
  75                 }
  76                 //If the square isn't open then just damage whatever is there
  77                 //TODO: A projectile must be deleted after this happens
  78                 else
  79                 {
  80                     theMap.damageSquare(gridX, gridY, damage);
  81                 }
  82             }
  83             //If it is not moving grid positions just increment pixelX and pixelY
  84             else
  85             {
  86                 pixelX += (int)velocity.X;
  87                 pixelY += (int)velocity.Y;
  88             }
  89
  90         }
  91         /// <summary>
  92         /// This method will draw a projectile to the screen
  93         /// </summary>
  94         /// <param name="spriteBatch"></param>
  95         /// <param name="topLeftX">The map X pixel position of the topLeft of the display</param>
  96         /// <param name="topLeftY">The map Y pixel position of the topLeft of the display</param>
  97         public void Draw(SpriteBatch spriteBatch, int topLeftX, int topLeftY)
  98         {
  99             spriteBatch.Draw(projectileModel, new Vector2(topLeftX - pixelX, topLeftY - pixelY), null, Color.White, 0, new Vector2(0f, 0f), 1f, SpriteEffects.None, 0);
 100         }
 101
 102         /// <summary>
 103         /// Basic getters and setters
 104         /// </summary>
 105         public int GridX { get { return gridX; } set { gridX = value; } }
 106         public int GridY { get { return gridY; } set { gridY = value; } }
 107         public int PixelX { get { return pixelX; } set { pixelX = value; } }
 108         public int PixelY { get { return pixelY; } set { pixelY = value; } }
 109         public Map TheMap { get { return theMap; } set { theMap = value; } }
 110     }
 111 }