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.model.geometry;
  
  import com.aionemu.gameserver.model.templates.zone.Point2D;
  import com.aionemu.gameserver.utils.MathUtil;
  import com.aionemu.gameserver.world.zone.ZoneName;
  
  /**
   * This class implements cylinder area
   *
   * @author SoulKeeper
   */
  public class CylinderArea extends AbstractArea {
  
  	/**
  	 * Center of cylinder
  	 */
  	private final float centerX;
  	/**
  	 * Center of cylinder
  	 */
  	private final float centerY;
  	/**
  	 * Cylinder radius
  	 */
  	private final float radius;
  
  	/**
  	 * Creates new cylinder with given radius
  	 *
  	 * @param center
  	 *            center of the circle
  	 * @param radius
  	 *            radius of the circle
  	 * @param minZ
  	 *            min z
  	 * @param maxZ
  	 *            max z
  	 */
  	public CylinderArea(ZoneName zoneName, int worldId, Point2D center, float radius, float minZ, float maxZ) {
  		this(zoneName, worldId, center.getX(), center.getY(), radius, minZ, maxZ);
  	}
  
  	/**
  	 * Creates new cylider with given radius
  	 *
  	 * @param x
  	 *            center coord
  	 * @param y
  	 *            center coord
  	 * @param radius
  	 *            radius of the circle
  	 * @param minZ
  	 *            min z
  	 * @param maxZ
  	 *            max z
  	 */
  	public CylinderArea(ZoneName zoneName, int worldId, float x, float y, float radius, float minZ, float maxZ) {
  		super(zoneName, worldId, minZ, maxZ);
  		this.centerX = x;
  		this.centerY = y;
  		this.radius = radius;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public boolean isInside2D(float x, float y) {
  		return MathUtil.getDistance(centerX, centerY, x, y) < radius;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public double getDistance2D(float x, float y) {
  		if (isInside2D(x, y)) {
  			return 0;
  		}
  		else {
  			return Math.abs(MathUtil.getDistance(centerX, centerY, x, y) - radius);
  		}
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public double getDistance3D(float x, float y, float z) {
  		if (isInside3D(x, y, z)) {
  			return 0;
  		}
  		else if (isInsideZ(z)) {
  			return getDistance2D(x, y);
  		}
  		else {
  			if (z < getMinZ()) {
  				return MathUtil.getDistance(centerX, centerY, getMinZ(), x, y, z);
  			}
  			else {
  				return MathUtil.getDistance(centerX, centerY, getMaxZ(), x, y, z);
  			}
  		}
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public Point2D getClosestPoint(float x, float y) {
  		if (isInside2D(x, y)) {
  			return new Point2D(x, y);
  		}
  		else {
  			float vX = x - this.centerX;
  			float vY = y - this.centerY;
  			double magV = MathUtil.getDistance(centerX, centerY, x, y);
  			double pointX = centerX + vX / magV * radius;
  			double pointY = centerY + vY / magV * radius;
  			return new Point2D((float) pointX, (float) pointY);
  		}
  	}
  
  	@Override
  	public boolean intersectsRectangle(RectangleArea area) {
  		if (area.getMinZ() > getMaxZ() || area.getMaxZ() < getMinZ()) {
  			return false;
  		}
  		if (area.getDistance2D(centerX, centerY) < radius) {
  			return true;
  		}
  		return false;
  	}
  }
  