Jacques Lucke
91694b9b58
This replaces header include guards with `#pragma once`. A couple of include guards are not removed yet (e.g. `__RNA_TYPES_H__`), because they are used in other places. This patch has been generated by P1561 followed by `make format`. Differential Revision: https://developer.blender.org/D8466
106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#pragma once
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/** \file
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* \ingroup freestyle
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* \brief Class to define a cell grid surrounding the bounding box of the scene
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*/
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#if 0
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# if defined(__GNUC__) && (__GNUC__ >= 3)
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// hash_map is not part of the C++ standard anymore;
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// hash_map.h has been kept though for backward compatibility
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# include <hash_map.h>
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# else
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# include <hash_map>
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# endif
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#endif
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#include <map>
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#include "Grid.h"
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namespace Freestyle {
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/*! Defines a hash table used for searching the Cells */
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struct GridHasher {
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#define _MUL 950706376UL
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#define _MOD 2147483647UL
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inline size_t operator()(const Vec3u &p) const
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{
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size_t res = ((unsigned long)(p[0] * _MUL)) % _MOD;
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res = ((res + (unsigned long)(p[1]) * _MUL)) % _MOD;
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return ((res + (unsigned long)(p[2]) * _MUL)) % _MOD;
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}
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#undef _MUL
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#undef _MOD
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};
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/*! Class to define a regular grid used for ray casting computations */
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class HashGrid : public Grid {
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public:
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typedef map<Vec3u, Cell *> GridHashTable;
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HashGrid() : Grid()
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{
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}
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virtual ~HashGrid()
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{
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clear();
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}
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/*! clears the grid
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* Deletes all the cells, clears the hashtable, resets size, size of cell, number of cells.
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*/
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virtual void clear();
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/*! Sets the different parameters of the grid
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* orig
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* The grid origin
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* size
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* The grid's dimensions
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* nb
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* The number of cells of the grid
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*/
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virtual void configure(const Vec3r &orig, const Vec3r &size, unsigned nb);
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/*! returns the cell whose coordinates are passed as argument */
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virtual Cell *getCell(const Vec3u &p)
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{
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Cell *found_cell = NULL;
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GridHashTable::const_iterator found = _cells.find(p);
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if (found != _cells.end()) {
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found_cell = (*found).second;
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}
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return found_cell;
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}
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/*! Fills the case p with the cell iCell */
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virtual void fillCell(const Vec3u &p, Cell &cell)
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{
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_cells[p] = &cell;
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}
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protected:
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GridHashTable _cells;
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};
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} /* namespace Freestyle */
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