rehtiLib/assets/loader/src/Utils.hpp File Reference

#include <exception>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <ranges>
#include <vector>
#include "../lodepng/lodepng.h"

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Functions
std::vector< std::string >	readDirectory (std::string path, std::string extension)
	Reads all the files in the directory and returns a vector of the filenames. Only returns files with the given extension. More...
void	readPng (std::vector< unsigned char > &image, unsigned &width, unsigned &height, std::string filepath)
	Reads a PNG file and returns the image data, width and height. More...
template<typename T >
void	rotateMatrix (std::vector< std::vector< T >> &matrix, uint8_t rotation)
	Rotates the matrix 90 degrees counter-clockwise. Rotation is calculated by rotation-param * 90 degrees. More...
template<typename T >
void	populateMatrix (std::vector< std::vector< T >> &matrix, const std::vector< std::vector< std::string >> &areaMap, T defaultValue, unsigned AREA_WIDTH, unsigned AREA_HEIGHT)
	Populates a matrix with a default value. The matrix is all the areas combined and expanded e.g. the whole map. The matrix row sizes DO NOT need to match. More...
template<typename T , typename K >
void	populateMatrixFromReference (std::vector< std::vector< T >> &matrix, const std::vector< std::vector< K >> &referenceMatrix, T defaultValue)
	Populates a matrix from a reference matrix. Uses a default value for empty cells. Reference matrix is given (instead of it's dimensions) because the row sizes might not match. More...
template<typename T >
void	writeMatrixToFile (const std::vector< std::vector< T >> &matrix, const std::string &filepath)
	Takes in a matrix<T> and writes that to a text file. Values are separated by commas and rows by newlines. More...

Function Documentation

populateMatrix()

template<typename T >

void populateMatrix	(	std::vector< std::vector< T >> &	matrix,
		const std::vector< std::vector< std::string >> &	areaMap,
		T	defaultValue,
		unsigned	AREA_WIDTH,
		unsigned	AREA_HEIGHT
	)

Populates a matrix with a default value. The matrix is all the areas combined and expanded e.g. the whole map. The matrix row sizes DO NOT need to match.

Parameters

matrix
areaMap
defaultValue
AREA_WIDTH
AREA_HEIGHT

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populateMatrixFromReference()

template<typename T , typename K >

void populateMatrixFromReference	(	std::vector< std::vector< T >> &	matrix,
		const std::vector< std::vector< K >> &	referenceMatrix,
		T	defaultValue
	)

Populates a matrix from a reference matrix. Uses a default value for empty cells. Reference matrix is given (instead of it's dimensions) because the row sizes might not match.

Parameters

matrix
referenceMatrix
defaultValue	to fill the matrix with

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readDirectory()

std::vector<std::string> readDirectory	(	std::string	path,
		std::string	extension
	)

Reads all the files in the directory and returns a vector of the filenames. Only returns files with the given extension.

Parameters

path	Path to the directory
extension	File extension to filter the files

Returns

std::vector<std::string> Vector of filenames

readPng()

void readPng	(	std::vector< unsigned char > &	image,
		unsigned &	width,
		unsigned &	height,
		std::string	filepath
	)

Reads a PNG file and returns the image data, width and height.

Parameters

image	Vector to store the image data
width	Width of the image
height	Height of the image
filepath	Filepath to the PNG file

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rotateMatrix()

template<typename T >

void rotateMatrix	(	std::vector< std::vector< T >> &	matrix,
		uint8_t	rotation
	)

Rotates the matrix 90 degrees counter-clockwise. Rotation is calculated by rotation-param * 90 degrees.

Parameters

matrix	Matrix to rotate
rotation	Number of 90 degree rotations

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writeMatrixToFile()

template<typename T >

void writeMatrixToFile	(	const std::vector< std::vector< T >> &	matrix,
		const std::string &	filepath
	)

Takes in a matrix<T> and writes that to a text file. Values are separated by commas and rows by newlines.

Row sizes do not need to match.

Parameters

matrix	Matrix to write to file
filepath	Filepath to write to