pandemonium_engine/modules/wfc/array_2d.h

#ifndef FAST_WFC_UTILS_ARRAY2D_HPP_
#define FAST_WFC_UTILS_ARRAY2D_HPP_

/*************************************************************************/
/*  array_2d.h                                                           */
/*************************************************************************/
/*                         This file is part of:                         */
/*                          PANDEMONIUM ENGINE                           */
/*             https://github.com/Relintai/pandemonium_engine            */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar.                              */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "core/containers/pool_vector.h"
#include "core/containers/vector.h"
#include "core/variant/variant.h"

template <typename T>
class Array2D {
public:
	int height;
	int width;

	Vector<T> data;

	Array2D() {
		height = 0;
		width = 0;
	}

	Array2D(int p_height, int p_width) {
		height = p_height;
		width = p_width;
		data.resize(width * height);
	}

	Array2D(int p_height, int p_width, T p_value) {
		height = p_height;
		width = p_width;
		data.resize(width * height);
		data.fill(p_value);
	}

	Array2D(const PoolIntArray &p_data, int p_height, int p_width) {
		int wh = p_width * p_height;
		if (wh != p_data.size()) {
			width = 0;
			height = 0;
			ERR_FAIL_MSG("wh != p_data.size()");
		}

		height = p_height;
		width = p_width;
		data.resize(wh);

		int *w = data.ptrw();
		int s = data.size();

		PoolIntArray::Read r = p_data.read();

		for (int i = 0; i < s; ++i) {
			w[i] = r[i];
		}
	}

	void resize(int p_height, int p_width) {
		height = p_height;
		width = p_width;
		data.resize(width * height);
	}

	void resize_fill(int p_height, int p_width, T p_value) {
		height = p_height;
		width = p_width;
		data.resize(width * height);
		data.fill(p_value);
	}

	void set_data(const PoolIntArray &p_data, int p_height, int p_width) {
		int wh = p_width * p_height;
		ERR_FAIL_COND(wh != p_data.size());

		resize(p_height, p_width);

		height = p_height;
		width = p_width;
		data.resize(wh);

		int *w = data.ptrw();
		int s = data.size();

		PoolIntArray::Read r = p_data.read();

		for (int i = 0; i < s; ++i) {
			w[i] = r[i];
		}
	}

	const T &get(int i, int j) const {
		CRASH_BAD_INDEX(i, height);
		CRASH_BAD_INDEX(j, width);

		return data[j + i * width];
	}

	T &get(int i, int j) {
		CRASH_BAD_INDEX(i, height);
		CRASH_BAD_INDEX(j, width);

		return data.write[j + i * width];
	}

	Array2D<T> reflected() const {
		Array2D<T> result = Array2D<T>(height, width);
		for (int y = 0; y < height; y++) {
			for (int x = 0; x < width; x++) {
				result.get(y, x) = get(y, width - 1 - x);
			}
		}
		return result;
	}

	Array2D<T> rotated() const {
		Array2D<T> result = Array2D<T>(width, height);
		for (int y = 0; y < width; y++) {
			for (int x = 0; x < height; x++) {
				result.get(y, x) = get(x, width - 1 - y);
			}
		}
		return result;
	}

	Array2D<T> get_sub_array(int y, int x, int sub_width, int sub_height) const {
		Array2D<T> sub_array_2d = Array2D<T>(sub_height, sub_width);
		for (int ki = 0; ki < sub_height; ki++) {
			for (int kj = 0; kj < sub_width; kj++) {
				sub_array_2d.get(ki, kj) = get((y + ki) % height, (x + kj) % width);
			}
		}
		return sub_array_2d;
	}

	bool operator==(const Array2D<T> &a) const {
		if (height != a.height || width != a.width) {
			return false;
		}

		for (int i = 0; i < data.size(); i++) {
			if (a.data[i] != data[i]) {
				return false;
			}
		}
		return true;
	}
};

#endif