111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
//Copyright (c) 2021 Ultimaker B.V.
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//CuraEngine is released under the terms of the AGPLv3 or higher.
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#ifndef UTILS_SQUARE_GRID_H
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#define UTILS_SQUARE_GRID_H
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#include "../../Point.hpp"
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#include <cassert>
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#include <unordered_map>
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#include <vector>
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#include <functional>
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namespace Slic3r::Arachne {
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/*!
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* Helper class to calculate coordinates on a square grid, and providing some
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* utility functions to process grids.
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*
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* Doesn't contain any data, except cell size. The purpose is only to
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* automatically generate coordinates on a grid, and automatically feed them to
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* functions.
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* The grid is theoretically infinite (bar integer limits).
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*/
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class SquareGrid
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{
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public:
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/*! \brief Constructs a grid with the specified cell size.
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* \param[in] cell_size The size to use for a cell (square) in the grid.
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*/
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SquareGrid(const coord_t cell_size);
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/*!
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* Get the cell size this grid was created for.
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*/
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coord_t getCellSize() const;
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using GridPoint = Point;
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using grid_coord_t = coord_t;
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/*! \brief Process cells along a line indicated by \p line.
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*
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* \param line The line along which to process cells.
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* \param process_func Processes each cell. ``process_func(elem)`` is called
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* for each cell. Processing stops if function returns false.
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* \return Whether we need to continue processing after this function.
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*/
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bool processLineCells(const std::pair<Point, Point> line, const std::function<bool (GridPoint)>& process_cell_func);
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/*! \brief Process cells along a line indicated by \p line.
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*
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* \param line The line along which to process cells
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* \param process_func Processes each cell. ``process_func(elem)`` is called
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* for each cell. Processing stops if function returns false.
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* \return Whether we need to continue processing after this function.
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*/
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bool processLineCells(const std::pair<Point, Point> line, const std::function<bool (GridPoint)>& process_cell_func) const;
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/*! \brief Process cells that might contain sought after points.
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*
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* Processes cells that might be within a square with twice \p radius as
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* width, centered around \p query_pt.
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* May process elements that are up to radius + cell_size from query_pt.
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* \param query_pt The point to search around.
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* \param radius The search radius.
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* \param process_func Processes each cell. ``process_func(loc)`` is called
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* for each cell coord within range. Processing stops if function returns
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* ``false``.
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* \return Whether we need to continue processing after this function.
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*/
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bool processNearby(const Point &query_pt, coord_t radius, const std::function<bool(const GridPoint &)> &process_func) const;
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/*! \brief Compute the grid coordinates of a point.
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* \param point The actual location.
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* \return The grid coordinates that correspond to \p point.
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*/
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GridPoint toGridPoint(const Vec2i64 &point) const;
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/*! \brief Compute the grid coordinate of a real space coordinate.
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* \param coord The actual location.
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* \return The grid coordinate that corresponds to \p coord.
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*/
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grid_coord_t toGridCoord(const int64_t &coord) const;
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/*! \brief Compute the lowest coord in a grid cell.
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* The lowest point is the point in the grid cell closest to the origin.
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*
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* \param grid_coord The grid coordinate.
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* \return The print space coordinate that corresponds to \p grid_coord.
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*/
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coord_t toLowerCoord(const grid_coord_t &grid_coord) const;
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protected:
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/*! \brief The cell (square) size. */
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coord_t cell_size;
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/*!
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* Compute the sign of a number.
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*
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* The number 0 will result in a positive sign (1).
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* \param z The number to find the sign of.
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* \return 1 if the number is positive or 0, or -1 if the number is
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* negative.
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*/
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grid_coord_t nonzeroSign(grid_coord_t z) const;
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};
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} // namespace Slic3r::Arachne
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#endif //UTILS_SQUARE_GRID_H
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