Anansi: Collecting Items

We collect the bonus items with the player ship. Everyone likes collectibles and scoring. The more the better. We can easily add let's say another 5 score points to the player's score when the ship picks up an item.

What do we have to do with our engine? We have to

• check if the player ship collides with a bonus item
• add points to the player's score
• remove the sprite
• add a ScoreTransition to the screen

Should be easy to do and done quickly, since it's similar to code we already have. Let's get coding.

We define the score value for the picking up of bonus items in the Settings class.

public static int SCORE_BONUS_STROYENT = 5;

We check if the player sprite collides with the bonus sprites

/**
 * Let player ship pick up bonus items. 
 * @param stroyentList
 */
private void checkBonusCollisions( List stroyentList) {
 
 for( Player player: playerList) {
  for( SpriteBase target: stroyentList) {
   
   // consider only alive sprites
   if( !target.isAlive())
    continue;

   if( player.collidesWith( target)) {
    
    // stop movement of sprite
    target.stopMovement();
    
    // show score
    spawnScoreTransition( target, Settings.SCORE_BONUS_STROYENT);

    // destroy sprite, set health to 0
    target.kill();
    
    // remove the sprite from screen by flagging it as removable
    target.remove();
    
   }
  }
 }
}

And we invoke the check method in the game loop

// bonus items
checkBonusCollisions( stroyentList);

That's it. You can see how it looks like in this screenshot, check out the fading text objects with "5" around the player ship: