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/*
* Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MANGOS_CELL_H
#define MANGOS_CELL_H
#include "GameSystem/TypeContainer.h"
#include "GameSystem/TypeContainerVisitor.h"
#include "GridDefines.h"
#include <cmath>
class Map;
enum District
{
UPPER_DISTRICT = 1,
LOWER_DISTRICT = 1 << 1,
LEFT_DISTRICT = 1 << 2,
RIGHT_DISTRICT = 1 << 3,
CENTER_DISTRICT = 1 << 4,
UPPER_LEFT_DISTRICT = (UPPER_DISTRICT | LEFT_DISTRICT),
UPPER_RIGHT_DISTRICT = (UPPER_DISTRICT | RIGHT_DISTRICT),
LOWER_LEFT_DISTRICT = (LOWER_DISTRICT | LEFT_DISTRICT),
LOWER_RIGHT_DISTRICT = (LOWER_DISTRICT | RIGHT_DISTRICT),
ALL_DISTRICT = (UPPER_DISTRICT | LOWER_DISTRICT | LEFT_DISTRICT | RIGHT_DISTRICT | CENTER_DISTRICT)
};
template<class T> struct CellLock;
struct MANGOS_DLL_DECL Cell
{
Cell() { data.All = 0; }
Cell(const Cell &cell) { data.All = cell.data.All; }
explicit Cell(CellPair const& p);
void operator|=(Cell &cell)
{
data.Part.reserved = 0;
cell.data.Part.reserved = 0;
uint32 x, y, old_x, old_y;
Compute(x, y);
cell.Compute(old_x, old_y);
if( std::abs(int(x-old_x)) > 1 || std::abs(int(y-old_y)) > 1)
{
data.Part.reserved = ALL_DISTRICT;
cell.data.Part.reserved = ALL_DISTRICT;
return;
}
if( x < old_x )
{
data.Part.reserved |= LEFT_DISTRICT;
cell.data.Part.reserved |= RIGHT_DISTRICT;
}
else if( old_x < x )
{
data.Part.reserved |= RIGHT_DISTRICT;
cell.data.Part.reserved |= LEFT_DISTRICT;
}
if( y < old_y )
{
data.Part.reserved |= UPPER_DISTRICT;
cell.data.Part.reserved |= LOWER_DISTRICT;
}
else if( old_y < y )
{
data.Part.reserved |= LOWER_DISTRICT;
cell.data.Part.reserved |= UPPER_DISTRICT;
}
}
void Compute(uint32 &x, uint32 &y) const
{
x = data.Part.grid_x*MAX_NUMBER_OF_CELLS + data.Part.cell_x;
y = data.Part.grid_y*MAX_NUMBER_OF_CELLS + data.Part.cell_y;
}
inline bool DiffCell(const Cell &cell) const
{
return( data.Part.cell_x != cell.data.Part.cell_x ||
data.Part.cell_y != cell.data.Part.cell_y );
}
inline bool DiffGrid(const Cell &cell) const
{
return( data.Part.grid_x != cell.data.Part.grid_x ||
data.Part.grid_y != cell.data.Part.grid_y );
}
uint32 CellX() const { return data.Part.cell_x; }
uint32 CellY() const { return data.Part.cell_y; }
uint32 GridX() const { return data.Part.grid_x; }
uint32 GridY() const { return data.Part.grid_y; }
bool NoCreate() const { return data.Part.nocreate; }
void SetNoCreate() { data.Part.nocreate = 1; }
CellPair cellPair() const
{
return CellPair(
data.Part.grid_x*MAX_NUMBER_OF_CELLS+data.Part.cell_x,
data.Part.grid_y*MAX_NUMBER_OF_CELLS+data.Part.cell_y);
}
Cell& operator=(const Cell &cell)
{
this->data.All = cell.data.All;
return *this;
}
bool operator==(const Cell &cell) const { return (data.All == cell.data.All); }
bool operator!=(const Cell &cell) const { return !operator==(cell); }
union
{
struct
{
unsigned grid_x : 6;
unsigned grid_y : 6;
unsigned cell_x : 4;
unsigned cell_y : 4;
unsigned nocreate : 1;
unsigned reserved : 11;
} Part;
uint32 All;
} data;
template<class LOCK_TYPE, class T, class CONTAINER> void Visit(const CellLock<LOCK_TYPE> &, TypeContainerVisitor<T, CONTAINER> &visitor, Map &) const;
};
template<class T>
struct MANGOS_DLL_DECL CellLock
{
const Cell& i_cell;
const CellPair &i_cellPair;
CellLock(const Cell &c, const CellPair &p) : i_cell(c), i_cellPair(p) {}
CellLock(const CellLock<T> &cell) : i_cell(cell.i_cell), i_cellPair(cell.i_cellPair) {}
const Cell* operator->(void) const { return &i_cell; }
const Cell* operator->(void) { return &i_cell; }
operator const Cell &(void) const { return i_cell; }
CellLock<T>& operator=(const CellLock<T> &cell)
{
this->~CellLock();
new (this) CellLock<T>(cell);
return *this;
}
};
#endif
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