c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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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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