Android Open Source - Avoidance Enemy Collision Handler

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License

The source code is released under:

GNU General Public License

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Java Source Code

/* 
 * Copyright (c) 2012 Jakob Svensson, Markus Ekstr?m
 * //from www . j  a  v a 2  s.c  om
 * This file is part of Avoidance.
 * 
 * Avoidance is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Avoidance is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Avoidance.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 */

package se.chalmers.avoidance.core.collisionhandlers;

import se.chalmers.avoidance.constants.GameConstants;
import se.chalmers.avoidance.core.components.Immortal;
import se.chalmers.avoidance.core.components.Jump;
import se.chalmers.avoidance.core.components.Score;

import com.artemis.ComponentMapper;
import com.artemis.Entity;
import com.artemis.World;
import com.artemis.managers.TagManager;

/**
 * Handles collision between player and enemies.
 * 
 * @author Jakob Svensson, Markus Ekstr?m
 * 
 */
public class EnemyCollisionHandler implements CollisionHandler {

  private World world;

  /**
   * Constructs a EnemyCollisionHandler.
   * 
   * @param world
   *            The world.
   */
  public EnemyCollisionHandler(World world) {
    this.world = world;
  }

  /**
   * Takes the player and enemy and handles the collision between them.
   * 
   * @param player
   *            The player.
   * @param enemy
   *            The enemy.
   */
  public void handleCollision(Entity player, Entity enemy) {
    // Handles collison between enemy and player
    ComponentMapper<Jump> jumpMapper = world.getMapper(Jump.class);
    ComponentMapper<Immortal> immortalMapper = world
        .getMapper(Immortal.class);
    Jump jump = jumpMapper.get(player);
    Immortal immortal = immortalMapper.get(player);
    if (jump != null && immortal != null) {
      if (!jump.isInTheAir() && !immortal.isImmortal()) {
        GameOverNotifier.getInstance().gameOver();
      } else if (immortal.isImmortal()
          || (jump.isInTheAir() && jump.getInTheAirDurationLeft() <= world.delta)) {
        world.deleteEntity(enemy);
        Score score = world.getManager(TagManager.class)
            .getEntity(GameConstants.TAG_SCORE)
            .getComponent(Score.class);
        if (score != null) {
          score.addKillScore(Score.KILL_SCORE);
        }
      }
    }
  }
}

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