Added fixed frame rate

Author: JOGUI22

Game.cpp

@@ -13,7 +13,7 @@ Game::~Game()
     //dtor
 }
 
-bool Game::inicialitzar(char* title, int xpos, int ypos, int width, int height, Uint32 flags)
+bool Game::init(char* title, int xpos, int ypos, int width, int height, Uint32 flags)
 {
     //try init SDL
     if (SDL_Init(SDL_INIT_EVERYTHING) == 0)
@@ -45,7 +45,7 @@ bool Game::inicialitzar(char* title, int xpos, int ypos, int width, int height,
         return false;
     }
     cout << "incialitacio correcte " << endl;
-    m_funcionant = true;
+    m_running = true;
 
     //load images/sprites on database;
     TextureManager::Instance()->load("img/animate-alpha.png", "animate_dog", m_pRenderer);
@@ -84,15 +84,15 @@ void Game::update()
     }
 }
 
-void Game::tractarEvents()
+void Game::handleEvents()
 {
     SDL_Event event;
     if (SDL_PollEvent(&event))//poll pila
     {
         switch (event.type) //triem tipus d'event
         {
         case SDL_QUIT:
-            m_funcionant = false;
+            m_running = false;
             break;
 
         default:
@@ -109,7 +109,7 @@ void Game::clean()
     SDL_Quit();
 }
 
-bool Game::getFuncionant() const
+bool Game::running() const
 {
-    return m_funcionant;
+    return m_running;
 }

Game.h

@@ -34,14 +34,14 @@ class Game //SINGLETON
         ~Game();
 
         //Game methods
-        bool inicialitzar(char* title, int xpos, int ypos, int width, int height, Uint32 flags); //conjunt de coses que configurar al iniciar el programa
+        bool init(char* title, int xpos, int ypos, int width, int height, Uint32 flags); //conjunt de coses que configurar al iniciar el programa
         void render(); //conjunt de coses que fan veure en pantalla
         void update();//actualitzacions bufferianes
-        void tractarEvents();//tractament de evenets (inputs)
+        void handleEvents();//tractament de evenets (inputs)
         void clean();//delete
 
         //GETs
-        bool getFuncionant() const;
+        bool running() const;
 
 
     private:
@@ -51,7 +51,7 @@ class Game //SINGLETON
         static Game* s_pInstance;
 
         //Atributs
-        bool m_funcionant; //Atribut per mirar si continua el loop del joc.
+        bool m_running; //Atribut per mirar si continua el loop del joc.
         SDL_Window* m_pWindow; //Window del joc.
         SDL_Renderer* m_pRenderer; //Renderer del joc.
         int m_currentFrame;

main.cpp

@@ -8,19 +8,32 @@
 
 #include "Game.h"
 
+//MAIN CONSTANTS
+const int FPS = 60; ///////////////////_______________////
+const int DELAY_TIME = 1000.0f / FPS;//fixed framerate////
+
 using namespace std;
 
 int main ( int argc, char** argv )
 {
-    if(TheGame::Instance()->inicialitzar("Chapter 1", 100, 100, 640, 480, 0))
+    Uint32 frameStart, frameTime;
+
+    if(TheGame::Instance()->init("Chapter 1", 100, 100, 640, 480, 0))
     {
-        while (TheGame::Instance()->getFuncionant())
+        while (TheGame::Instance()->running())
         {
-            TheGame::Instance()->tractarEvents();
+            frameStart = SDL_GetTicks(); //fixed frame rate var
+
+            TheGame::Instance()->handleEvents();
             TheGame::Instance()->update();
             TheGame::Instance()->render();
 
-            SDL_Delay(10);
+            frameTime = SDL_GetTicks() - frameStart; //fixed frame rate var
+
+            if (frameTime < DELAY_TIME) //fixed frame rate
+            {
+                SDL_Delay((int)(DELAY_TIME - frameTime)); //delay to achieve fixed frame rate
+            }
         }
         TheGame::Instance()->clean();
     }