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/* -*- Mode: c++ -*- */
/***************************************************************************
* grid.h
*
* Sat Jun 16 11:52:08 CEST 2018
* Copyright 2018 André Nusser
* andre.nusser@googlemail.com
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
#include <vector>
template <typename T>
class Grid
{
public:
using Index = std::size_t;
struct Pos
{
T x, y;
Pos(T x, T y) : x(x), y(y) {}
};
Grid() = default;
Grid(Index width, Index height);
Grid(Index width, Index height, T value);
bool is_valid(Index x, Index y) const;
bool is_valid(Pos pos) const;
Index width() const;
Index height() const;
T operator()(Pos pos) const;
T operator()(Index x, Index y) const;
T& operator()(Pos pos);
T& operator()(Index x, Index y);
void resize(Index width, Index height);
void assign(Index width, Index height, T value);
private:
Index _width;
Index _height;
std::vector<T> _entries;
};
template <typename T>
Grid<T>::Grid(Index width, Index height)
: _width(width), _height(height), _entries(_width*_height) {}
template <typename T>
Grid<T>::Grid(Index width, Index height, T value)
: _width(width), _height(height), _entries(_width*_height, value) {}
template <typename T>
bool Grid<T>::is_valid(Index x, Index y) const
{
return x >= 0 && x < _width && y >= 0 && y < _height;
}
template <typename T>
bool Grid<T>::is_valid(Pos pos) const
{
return is_valid(pos.x, pos.y);
}
template <typename T>
auto Grid<T>::width() const -> Index
{
return _width;
}
template <typename T>
auto Grid<T>::height() const -> Index
{
return _height;
}
template <typename T>
T Grid<T>::operator()(Pos pos) const
{
return _entries.at(pos.x + _width*pos.y);
}
template <typename T>
T Grid<T>::operator()(Index x, Index y) const
{
return _entries.at(x + _width*y);
}
template <typename T>
T& Grid<T>::operator()(Pos pos)
{
return _entries.at(pos.x + _width*pos.y);
}
template <typename T>
T& Grid<T>::operator()(Index x, Index y)
{
return _entries.at(x + _width*y);
}
template <typename T>
void Grid<T>::resize(Index width, Index height)
{
_width = width;
_height = height;
_entries.resize(_width*_height);
}
template <typename T>
void Grid<T>::assign(Index width, Index height, T value)
{
_width = width;
_height = height;
_entries.assign(_width*_height, value);
}
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