From bf34d835e4ea49bd4ef2e5de2b1fea2fd3c95adc Mon Sep 17 00:00:00 2001
From: Ekaitz Zarraga <ekaitz@elenq.tech>
Date: Tue, 29 Nov 2022 18:19:25 +0100
Subject: Start to use a normal game structure:

- App class that has a StateStack
- StateStack
- Some State definiton and a minimal TitleState to use as a template
- Makefile updated accordingly
- Delete old code that was there for testing
---
 src/app.cpp | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/app.cpp

(limited to 'src/app.cpp')

diff --git a/src/app.cpp b/src/app.cpp
new file mode 100644
index 0000000..30bccdf
--- /dev/null
+++ b/src/app.cpp
@@ -0,0 +1,71 @@
+#include "app.h"
+#include "states/ids.h"
+#include "states/titleState.h"
+
+const sf::Time App::TIME_PER_FRAME = sf::seconds(1.f/60.f);
+
+
+App::App()
+    : textures_()
+    , window_(sf::VideoMode(640, 480), "Demo game" )
+    , stateStack_( State::Context{&window_, &textures_} )
+    //, player_()
+{
+    window_.setFramerateLimit(60);
+
+    registerStates();
+    stateStack_.push(States::Id::Title);
+}
+
+void App::run(){
+    // Make the app render the current state, so it needs a state stack too
+    sf::Clock clock;
+    sf::Time timeSinceLastUpdate = sf::Time::Zero;
+
+    while(window_.isOpen()){
+
+
+        // TODO Maybe move to a fixed time game loop (I prefer that)
+        sf::Time dt = clock.restart();
+        timeSinceLastUpdate += dt;
+
+        while (timeSinceLastUpdate > TIME_PER_FRAME)
+        {
+            timeSinceLastUpdate -= TIME_PER_FRAME;
+
+            processInput();
+            update(TIME_PER_FRAME);
+
+            // Check inside this loop, because stack might be empty before update() call
+            if (stateStack_.isEmpty()) window_.close();
+        }
+
+        render();
+    }
+}
+
+void App::render(){
+    window_.clear();
+    stateStack_.render();
+    window_.display();
+}
+
+
+void App::update(sf::Time dt){
+    stateStack_.update(dt);
+}
+
+void App::processInput(){
+    sf::Event event;
+    while (window_.pollEvent(event))
+    {
+        stateStack_.handleEvent(event);
+
+        if (event.type == sf::Event::Closed)
+            window_.close();
+    }
+}
+
+void App::registerStates(){
+    stateStack_.registerState<TitleState>(States::Id::Title);
+}
-- 
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