MarioLiebisch’s gists

MarioLiebisch / thr-race.cpp

Created June 27, 2017 06:51

Quick example of a threading race condition

	#include <SFML/System.hpp>
	#include <iostream>

	int main()
	{
	int i = 0;
	sf::Thread thread([](int j) { ++j; }, &i);
	thread.launch();

	std::cout << i; // This output is a race condition; it's either 0 or 1 depending on how fast the extra thread is executed

MarioLiebisch / rotate.cpp

Created August 25, 2017 08:30

Transforming a vector using SFML, e.g. by rotating it by 45 degree.

	#include <SFML/Graphics/Transform.hpp>
	#include <SFML/System/Vector2.hpp>
	#include <iostream>

	int main() {
	// First we'll need a vector to tranform
	sf::Vector2f myVector(2, 0);
	std::cout << "myVector: " << myVector.x << ", " << myVector.y << "\n";

	// Then the actual transform

MarioLiebisch / tetrominos.cpp

Created December 24, 2017 08:43

A simple example on how one could render concave shapes such as tetrominos using SFML's `sf::VertexArray`

	#include <SFML/Graphics.hpp>

	int main() {
	sf::RenderWindow window(sf::VideoMode(800, 600), "Tetrominos");

	// The quads approach is easiest to understand
	// (Note this is not supported on mobile targets and you'd have to define triangles instead)
	sf::VertexArray quads(sf::Quads);

	// Left piece

MarioLiebisch / circletext.cpp

Last active May 12, 2018 16:54

A minimalistic example to print text in a circle using SFML. (Example output: https://i.imgur.com/2M2OURz.png)

	#include <SFML/Graphics.hpp>

	int main(int argc, char **argv) {
	sf::RenderWindow window(sf::VideoMode(800, 600), "Circle Text", sf::Style::Default);
	window.setVerticalSyncEnabled(true);

	sf::Font font;
	font.loadFromFile("arial.ttf");

	sf::Text text("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean ut ultrices ante. Aliquam ornare eu enim eget accumsan.", font);

MarioLiebisch / observable.cpp

Created July 10, 2018 13:49

Simple implementation of an observable variable that will trigger once its value is changed (and which could be adjusted in the callback). This was really just a random idea, it's not perfect by any means.

	#include <iostream>
	#include <functional>
	#include <string>

	// Definee an `Observable` class.
	// This works as a wrapper around a variable of any type.
	// Once it's assigned a new value, a predefined callback is defined to react on this.
	template<typename T>
	class Observable {
	public:

MarioLiebisch / fpsmeter.cpp

Last active July 16, 2018 08:09

A simple to use, self-containing FPS meter for SFML programs I use for testing

	/*
	Usage:

	* Load a font, if you don't have one yet
	* Create the `FpsMeter` object
	* Optional: Set a position
	* Draw the meter

	sf::Font font;
	font.loadFromFile("myfont.ttf");

MarioLiebisch / getself.cpp

Created July 22, 2018 16:18

Small utility function to get a running program's own executable path. This should work even if it's called using a symbolic link.

	std::string getSelf()
	{
	char buf[1024] = { 0 };
	#ifdef WIN32
	DWORD ret = GetModuleFileNameA(NULL, buf, sizeof(buf));
	if (ret && ret != sizeof(buf)) {
	std::string res(buf);
	for (auto &c : res)
	if (c == '\\')
	c = '/';

MarioLiebisch / statswindow.cpp

Created August 26, 2018 19:02

Small example how to add stats counting to a SFML `sf::RenderWindow`. Release builds could just use `sf::RenderWindow` directly instead. Note this isn't necessarily 100% perfect or correct; written from memory.

	#include <SFML/Graphics.hpp>
	#include <sstream>

	class RenderWindowStats : public sf::RenderWindow {
	public:
	RenderWindowStats() : RenderWindow({640, 480}, "Test") {
	}

	void draw(sf::Drawable &dr, sf::RenderStates states = sf::RenderStates()) {
	++mDrawCallsTemp;

MarioLiebisch / timer.cpp

Created May 6, 2019 18:11

Quick and simple timer example using SFML

	#include <SFML/Graphics.hpp>
	#include <sstream>
	#include <iomanip>

	int main(int argc, char **argv) {
	sf::RenderWindow window(sf::VideoMode(300, 100), "Timer Test", sf::Style::Default);
	window.setVerticalSyncEnabled(true);

	sf::Font font;
	font.loadFromFile("Arial.ttf");

MarioLiebisch / conext.hpp

Created July 14, 2019 12:42

An old simple wrapper I've used in a few old tools to get cross-platform coloring in console

	/**
	* @file conext.h
	* @author Mario Liebisch <[email protected]>
	* @section LICENSE
	*
	* © 2011 All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*

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