voxelalgorithms.h

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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
#pragma once
 
#include "voxel.h"
#include "mapnode.h"
#include "util/container.h"
 
class Map;
class MapBlock;
class MMVManip;
 
namespace voxalgo
{
 
void update_lighting_nodes(
    Map *map,
    const std::vector<std::pair<v3s16, MapNode>> &oldnodes,
    std::map<v3s16, MapBlock*> &modified_blocks);
 
void update_block_border_lighting(Map *map, MapBlock *block,
    std::map<v3s16, MapBlock*> &modified_blocks);
 
void blit_back_with_light(Map *map, MMVManip *vm,
    std::map<v3s16, MapBlock*> *modified_blocks);
 
void repair_block_light(Map *map, MapBlock *block,
    std::map<v3s16, MapBlock*> *modified_blocks);
 
struct VoxelLineIterator
{
public:
    v3f m_start_position;
    v3f m_line_vector;
    v3f m_next_intersection_multi { 10000.0f, 10000.0f, 10000.0f };
    v3f m_intersection_multi_inc { 10000.0f, 10000.0f, 10000.0f };
    v3s16 m_step_directions { 1, 1, 1 };
    v3s16 m_current_node_pos;
    s16 m_current_index = 0;
    v3s16 m_start_node_pos;
    s16 m_last_index;
 
    VoxelLineIterator(const v3f &start_position,const v3f &line_vector);
 
    void next();
 
    inline bool hasNext() const
    {
        return m_current_index < m_last_index;
    }
 
    s16 getIndex(v3s16 voxel);
};
 
} // namespace voxalgo