1  /**
  2   *  GameSprite contains the Sprite class for the Epsilon game.
  3   *  Epsilon is a simple space-shooter-vertical-scroller game.
  4   *
  5   *  Epsilon is available for non-commercial use only!
  6   *  You can learn from this sources and you can modify them
  7   *  for learning purposes.
  8   * 
  9   *  @author      Ziga Hajdukovic
 10   *  @version     1.0
 11   *  
 12   *  
 13   *  CHANGES
 14   *  + frameId
 15   *  + frameIdMax
 16   *  + imageId replaced Image object
 17   *  + spriteImageFrameWidths[]
 18   *  
 19   */  
 20 
 21 class GameSprite {
 22 
 23         public int x;
 24         public int y;
 25         
 26         public int w;
 27         public int h;
 28         
 29         public int vx;
 30         public int vy;
 31         
 32         public short energy;
 33         public short energyMax;
 34         
 35         public short damage;
 36         public short score;
 37 
 38         public byte spriteId;
 39 
 40         public byte imageId;
 41         
 42         public byte frameId;
 43         public byte frameIdMax;
 44 
 45         public byte fire_cooldown_frames_counter;
 46         
 47         //public byte spriteId;
 48         
 49         public static final byte[] spriteImageFrameWidths =
 50         {
 51                 26,     // SPRITE_IMAGE_PLAYER
 52                  4, // SPRITE_IMAGE_FIRE
 53                 45, // SPRITE_IMAGE_BOSS1
 54                 20, // SPRITE_IMAGE_ENEMY1
 55                 20, // SPRITE_IMAGE_ENEMY2
 56                 20, // SPRITE_IMAGE_ENEMY3
 57                 20, // SPRITE_IMAGE_EXPLOSION
 58         };
 59 
 60         public static final byte SPRITE_DATA_INDEX_IMG_ID = 0;
 61         public static final byte SPRITE_DATA_INDEX_MAX_ENERGY = 1;
 62         public static final byte SPRITE_DATA_INDEX_DAMAGE = 2;
 63         public static final byte SPRITE_DATA_INDEX_SCORE = 3;
 64         
 65         // spriteData[sprite_id][data_index],  image_id, energyMax, damage, score
 66         public static final short[][] spriteData = {
 67                 { GameCanvas.SPRITE_IMAGE_PLAYER, 200, 20, 0 },         //      SPRITE_ID_PLAYER
 68                 { GameCanvas.SPRITE_IMAGE_ENEMY1, 40, 30, 20 },         //      SPRITE_ID_ENEMY1
 69                 { GameCanvas.SPRITE_IMAGE_ENEMY1, 40, 30, 40 },         //      SPRITE_ID_ENEMY1_SHOOTING
 70                 { GameCanvas.SPRITE_IMAGE_ENEMY2, 20, 20, 10 },         //      SPRITE_ID_ENEMY3
 71                 { GameCanvas.SPRITE_IMAGE_ENEMY2, 20, 20, 20 },         //      SPRITE_ID_ENEMY2_SHOOTING
 72                 { GameCanvas.SPRITE_IMAGE_ENEMY3, 60, 40, 30 },         //      SPRITE_ID_ENEMY3
 73                 { GameCanvas.SPRITE_IMAGE_BOSS1, 200, 100, 100 },       //      SPRITE_ID_BOSS1
 74                 { GameCanvas.SPRITE_IMAGE_EXPLOSION, 0, 0, 0 },         //      SPRITE_ID_EXPLOSION
 75                 { GameCanvas.SPRITE_IMAGE_FIRE, 0, 20, 0 },                     //      SPRITE_ID_FIRE1  // player fire
 76                 { GameCanvas.SPRITE_IMAGE_FIRE, 0, 20, 0 },                     //      SPRITE_ID_FIRE2  // blue fire
 77                 { GameCanvas.SPRITE_IMAGE_FIRE, 0, 10, 0 },                     //      SPRITE_ID_FIRE3  // green round bullet
 78         };
 79         
 80         public static final byte EXPLOSION_FRAME_SMOKE_START = 2;
 81 
 82         GameSprite( byte sprite_id )
 83         {
 84                 spriteId = sprite_id;
 85                 imageId = (byte) spriteData[sprite_id][SPRITE_DATA_INDEX_IMG_ID];
 86                 w = spriteImageFrameWidths[imageId];
 87                 h = GameCanvas.spriteImages[imageId].getHeight();
 88                 frameId = 0;
 89                 frameIdMax = (byte) (GameCanvas.spriteImages[imageId].getWidth() / w - 1);
 90                 vx = 4;
 91                 vy = 4;
 92                 energyMax = spriteData[sprite_id][SPRITE_DATA_INDEX_MAX_ENERGY];;
 93                 energy = energyMax;
 94 
 95                 damage = (byte) spriteData[sprite_id][SPRITE_DATA_INDEX_DAMAGE];
 96                 score = (byte) spriteData[sprite_id][SPRITE_DATA_INDEX_SCORE];
 97         }
 98 
 99         public boolean collidesWith(GameSprite sprite)
100         {
101                 return (x+w > sprite.x) && (x < sprite.x + sprite.w) &&
102                            (y+h > sprite.y) && (y < sprite.y + sprite.h);
103         }
104 }
105