168 lines
3.1 KiB
Java
168 lines
3.1 KiB
Java
/*
|
|
* Copyright (C) 2004-2015 L2J Server
|
|
*
|
|
* This file is part of L2J Server.
|
|
*
|
|
* L2J Server 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.
|
|
*
|
|
* L2J Server 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 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package com.l2jserver.gameserver.util;
|
|
|
|
/**
|
|
* @author HorridoJoho
|
|
*/
|
|
public final class LinePointIterator3D
|
|
{
|
|
private int _srcX;
|
|
private int _srcY;
|
|
private int _srcZ;
|
|
private final int _dstX;
|
|
private final int _dstY;
|
|
private final int _dstZ;
|
|
private final long _dx;
|
|
private final long _dy;
|
|
private final long _dz;
|
|
private final long _sx;
|
|
private final long _sy;
|
|
private final long _sz;
|
|
private long _error;
|
|
private long _error2;
|
|
private boolean _first;
|
|
|
|
public LinePointIterator3D(int srcX, int srcY, int srcZ, int dstX, int dstY, int dstZ)
|
|
{
|
|
_srcX = srcX;
|
|
_srcY = srcY;
|
|
_srcZ = srcZ;
|
|
_dstX = dstX;
|
|
_dstY = dstY;
|
|
_dstZ = dstZ;
|
|
_dx = Math.abs((long) dstX - srcX);
|
|
_dy = Math.abs((long) dstY - srcY);
|
|
_dz = Math.abs((long) dstZ - srcZ);
|
|
_sx = srcX < dstX ? 1 : -1;
|
|
_sy = srcY < dstY ? 1 : -1;
|
|
_sz = srcZ < dstZ ? 1 : -1;
|
|
|
|
if ((_dx >= _dy) && (_dx >= _dz))
|
|
{
|
|
_error = _error2 = _dx / 2;
|
|
}
|
|
else if ((_dy >= _dx) && (_dy >= _dz))
|
|
{
|
|
_error = _error2 = _dy / 2;
|
|
}
|
|
else
|
|
{
|
|
_error = _error2 = _dz / 2;
|
|
}
|
|
|
|
_first = true;
|
|
}
|
|
|
|
public boolean next()
|
|
{
|
|
if (_first)
|
|
{
|
|
_first = false;
|
|
return true;
|
|
}
|
|
else if ((_dx >= _dy) && (_dx >= _dz))
|
|
{
|
|
if (_srcX != _dstX)
|
|
{
|
|
_srcX += _sx;
|
|
|
|
_error += _dy;
|
|
if (_error >= _dx)
|
|
{
|
|
_srcY += _sy;
|
|
_error -= _dx;
|
|
}
|
|
|
|
_error2 += _dz;
|
|
if (_error2 >= _dx)
|
|
{
|
|
_srcZ += _sz;
|
|
_error2 -= _dx;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
else if ((_dy >= _dx) && (_dy >= _dz))
|
|
{
|
|
if (_srcY != _dstY)
|
|
{
|
|
_srcY += _sy;
|
|
|
|
_error += _dx;
|
|
if (_error >= _dy)
|
|
{
|
|
_srcX += _sx;
|
|
_error -= _dy;
|
|
}
|
|
|
|
_error2 += _dz;
|
|
if (_error2 >= _dy)
|
|
{
|
|
_srcZ += _sz;
|
|
_error2 -= _dy;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (_srcZ != _dstZ)
|
|
{
|
|
_srcZ += _sz;
|
|
|
|
_error += _dx;
|
|
if (_error >= _dz)
|
|
{
|
|
_srcX += _sx;
|
|
_error -= _dz;
|
|
}
|
|
|
|
_error2 += _dy;
|
|
if (_error2 >= _dz)
|
|
{
|
|
_srcY += _sy;
|
|
_error2 -= _dz;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public int x()
|
|
{
|
|
return _srcX;
|
|
}
|
|
|
|
public int y()
|
|
{
|
|
return _srcY;
|
|
}
|
|
|
|
public int z()
|
|
{
|
|
return _srcZ;
|
|
}
|
|
}
|