content: /*
  	This file is part of the OdinMS Maple Story Server
      Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
  		       Matthias Butz <matze@odinms.de>
  		       Jan Christian Meyer <vimes@odinms.de>
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU Affero General Public License as
      published by the Free Software Foundation version 3 as published by
      the Free Software Foundation. You may not use, modify or distribute
      this program under any other version of the GNU Affero General Public
      License.
  
      This program 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 Affero General Public License for more details.
  
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  package server.maps;
  
  import java.util.Arrays;
  
  import tools.data.input.ByteArrayByteStream;
  import tools.data.input.GenericSeekableLittleEndianAccessor;
  import tools.data.input.SeekableLittleEndianAccessor;
  import tools.data.output.MaplePacketLittleEndianWriter;
  
  public abstract class AbstractAnimatedMapleMapObject extends AbstractMapleMapObject implements AnimatedMapleMapObject {
      
  	static {
  		MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter((int) getIdleMovementDataLength());
      	mplew.write(1); //movement command count
      	mplew.write(0);
      	mplew.writeShort(-1); //x
      	mplew.writeShort(-1); //y
      	mplew.writeShort(0); //xwobble
      	mplew.writeShort(0); //ywobble
      	mplew.writeShort(0); //fh
      	mplew.write(-1); //stance
      	mplew.writeShort(0); //duration
      	idleMovementPacketData = mplew.getPacket();
  	}
  	
  	private static final byte[] idleMovementPacketData;
  	
  	private int stance;
  
      @Override
      public int getStance() {
          return stance;
      }
  
      @Override
      public void setStance(int stance) {
          this.stance = stance;
      }
  
      @Override
      public boolean isFacingLeft() {
          return Math.abs(stance) % 2 == 1;
      }
      
      public SeekableLittleEndianAccessor getIdleMovement() {
      	byte[] movementData = Arrays.copyOf(idleMovementPacketData, idleMovementPacketData.length);
      	//seems wasteful to create a whole packet writer when only a few values are changed
      	int x = getPosition().x;
      	int y = getPosition().y;
      	movementData[2] = (byte) (x & 0xFF); //x
      	movementData[3] = (byte) (x >> 8 & 0xFF);
      	movementData[4] = (byte) (y & 0xFF); //y
      	movementData[5] = (byte) (y >> 8 & 0xFF);
      	movementData[12] = (byte) (getStance() & 0xFF);
      	return new GenericSeekableLittleEndianAccessor(new ByteArrayByteStream(movementData));
      }
      
      public static long getIdleMovementDataLength() {
      	return 15;
      }
  }
  