Cell.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef TRINITY_CELL_H
#define TRINITY_CELL_H
 
#include "TypeContainer.h"
#include "TypeContainerVisitor.h"
 
#include "GridDefines.h"
 
class Map;
class WorldObject;
 
struct CellArea
{
    CellArea() { }
    CellArea(CellCoord low, CellCoord high) : low_bound(low), high_bound(high) { }
 
    bool operator!() const { return low_bound == high_bound; }
 
    void ResizeBorders(CellCoord& begin_cell, CellCoord& end_cell) const
    {
        begin_cell = low_bound;
        end_cell = high_bound;
    }
 
    CellCoord low_bound;
    CellCoord high_bound;
};
 
struct Cell
{
    Cell() : data() { }
    explicit Cell(CellCoord const& p);
    explicit Cell(float x, float y) : Cell(Trinity::ComputeCellCoord(x, y)) { }
 
    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;
    }
 
    bool DiffCell(Cell const& cell) const
    {
        return(data.Part.cell_x != cell.data.Part.cell_x ||
            data.Part.cell_y != cell.data.Part.cell_y);
    }
 
    bool DiffGrid(Cell const& 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; }
 
    CellCoord GetCellCoord() const
    {
        return CellCoord(
            data.Part.grid_x * MAX_NUMBER_OF_CELLS+data.Part.cell_x,
            data.Part.grid_y * MAX_NUMBER_OF_CELLS+data.Part.cell_y);
    }
 
    bool operator == (Cell const& cell) const { return (data.All == cell.data.All); }
    union
    {
        struct
        {
            uint8 grid_x;
            uint8 grid_y;
            uint8 cell_x;
            uint8 cell_y;
            uint8 nocreate;
        } Part;
        uint64 All;
    } data;
 
    template<class T, class CONTAINER> void Visit(CellCoord const&, TypeContainerVisitor<T, CONTAINER>& visitor, Map&, WorldObject const& obj, float radius) const;
    template<class T, class CONTAINER> void Visit(CellCoord const&, TypeContainerVisitor<T, CONTAINER>& visitor, Map&, float x, float y, float radius) const;
 
    static CellArea CalculateCellArea(float x, float y, float radius);
 
    template<class T> static void VisitGridObjects(WorldObject const* obj, T& visitor, float radius, bool dont_load = true);
    template<class T> static void VisitWorldObjects(WorldObject const* obj, T& visitor, float radius, bool dont_load = true);
    template<class T> static void VisitAllObjects(WorldObject const* obj, T& visitor, float radius, bool dont_load = true);
 
    template<class T> static void VisitGridObjects(float x, float y, Map* map, T& visitor, float radius, bool dont_load = true);
    template<class T> static void VisitWorldObjects(float x, float y, Map* map, T& visitor, float radius, bool dont_load = true);
    template<class T> static void VisitAllObjects(float x, float y, Map* map, T& visitor, float radius, bool dont_load = true);
 
private:
    template<class T, class CONTAINER> void VisitCircle(TypeContainerVisitor<T, CONTAINER> &, Map &, CellCoord const&, CellCoord const&) const;
};
 
#endif