this.len = len;
ByteBuf data = Unpooled.buffer();
data.writeInt( getPacketID() );
data.writeFloat( (float) x );
data.writeFloat( (float) y );
data.writeFloat( (float) z );
data.writeFloat( (float) this.dx );
data.writeFloat( (float) this.dy );
data.writeFloat( (float) this.dz );