content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning 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.
   *
   *  Aion-Lightning 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 Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  package com.aionemu.gameserver.skillengine.effect;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlType;
  
  import com.aionemu.gameserver.geoEngine.collision.CollisionIntention;
  import com.aionemu.gameserver.geoEngine.math.Vector3f;
  import com.aionemu.gameserver.model.gameobjects.Creature;
  import com.aionemu.gameserver.model.gameobjects.player.Player;
  import com.aionemu.gameserver.model.templates.item.ItemTemplate;
  import com.aionemu.gameserver.network.aion.serverpackets.SM_TARGET_UPDATE;
  import com.aionemu.gameserver.skillengine.SkillEngine;
  import com.aionemu.gameserver.skillengine.model.DashStatus;
  import com.aionemu.gameserver.skillengine.model.Effect;
  import com.aionemu.gameserver.skillengine.model.Skill;
  import com.aionemu.gameserver.skillengine.model.SkillMoveType;
  import com.aionemu.gameserver.utils.MathUtil;
  import com.aionemu.gameserver.utils.PacketSendUtility;
  import com.aionemu.gameserver.world.World;
  import com.aionemu.gameserver.world.geo.GeoService;
  
  /**
   * @author Sarynth, modified Bobobear
   * @author FrozenKiller
   */
  @XmlAccessorType(XmlAccessType.FIELD)
  @XmlType(name = "MoveBehindEffect")
  public class MoveBehindEffect extends EffectTemplate {
  
  	@Override
  	public void applyEffect(Effect effect) {
  		Player effector = (Player) effect.getEffector();
  		// Deselect targets
  		PacketSendUtility.sendPacket(effector, new SM_TARGET_UPDATE(effector));
  		// Move Effector to Effected
  		Skill skill = effect.getSkill();
  		World.getInstance().updatePosition(effector, skill.getX(), skill.getY(), skill.getZ(), skill.getH());
  	}
  
  	@Override
  	public void calculate(Effect effect) {
  		final Player effector = (Player) effect.getEffector();
  		final Creature effected = effect.getEffected();
  		final ItemTemplate itemTemplate = effect.getItemTemplate();
  		
  		effect.addSucessEffect(this);
  		effect.setSkillMoveType(SkillMoveType.MOVEBEHIND);
  		effect.setDashStatus(DashStatus.MOVEBEHIND);
  
  		double radian = Math.toRadians(MathUtil.convertHeadingToDegree(effected.getHeading()));
  		float x1 = (float) (Math.cos(Math.PI + radian) * 1.3F);
  		float y1 = (float) (Math.sin(Math.PI + radian) * 1.3F);
  		byte intentions = (byte) (CollisionIntention.PHYSICAL.getId() | CollisionIntention.DOOR.getId());
  		Vector3f closestCollision = GeoService.getInstance().getClosestCollision(effector, effected.getX() + x1, effected.getY() + y1, effected.getZ(), false, intentions);
  
  		// stop moving
  		effected.getMoveController().abortMove();
  		
  		if (itemTemplate != null) {
  			SkillEngine.getInstance().getSkill(effector, effect.getSkillId(), 1, effected).useNoAnimationSkill();
  		}
  		
  		// set new world position for effector
  		effect.getSkill().setTargetPosition(closestCollision.getX(), closestCollision.getY(), closestCollision.getZ(), effected.getHeading());
  	}
  }
  