Added screenshots

Author: r-o-b-o-t-o

README.md

@@ -1 +1,9 @@
 # OpenGL Particles
+
+
+
+### Screenshots
+
+![Confetti](screenshots/confetti.png)  
+![Snowflakes](screenshots/snowflakes.png)  
+![Fire](screenshots/fire.png)  

include/Application.h

@@ -30,11 +30,13 @@ class Application {
 	void update(GLFWwindow* window, float deltaTime);
 	void onWindowSizeChanged(int width, int height);
 	void drawParticles();
+	void onKeyEvent(GLFWwindow* window, int key, int scancode, int action, int mods);
 	int getScreenWidth() const;
 	int getScreenHeight() const;
 
 private:
 	void drawUi();
+	void takeScreenshot() const;
 
 	int screenWidth;
 	int screenHeight;