Add full source code of the finished (and revised code) Breakout example. Not set up for cross-platform compilation as it has irrKlang and FreeType dependency, but at least source code is available online (and can be referenced from Breakout chapters).

src/7.in_practice/3.2d_game/0.full_source/game_level.cpp

@@ -0,0 +1,93 @@
+/*******************************************************************
+** This code is part of Breakout.
+**
+** Breakout is free software: you can redistribute it and/or modify
+** it under the terms of the CC BY 4.0 license as published by
+** Creative Commons, either version 4 of the License, or (at your
+** option) any later version.
+******************************************************************/
+#include "game_level.h"
+
+#include <fstream>
+#include <sstream>
+
+
+void GameLevel::Load(const char *file, unsigned int levelWidth, unsigned int levelHeight)
+{
+    // clear old data
+    this->Bricks.clear();
+    // load from file
+    unsigned int tileCode;
+    GameLevel level;
+    std::string line;
+    std::ifstream fstream(file);
+    std::vector<std::vector<unsigned int>> tileData;
+    if (fstream)
+    {
+        while (std::getline(fstream, line)) // read each line from level file
+        {
+            std::istringstream sstream(line);
+            std::vector<unsigned int> row;
+            while (sstream >> tileCode) // read each word seperated by spaces
+                row.push_back(tileCode);
+            tileData.push_back(row);
+        }
+        if (tileData.size() > 0)
+            this->init(tileData, levelWidth, levelHeight);
+    }
+}
+
+void GameLevel::Draw(SpriteRenderer &renderer)
+{
+    for (GameObject &tile : this->Bricks)
+        if (!tile.Destroyed)
+            tile.Draw(renderer);
+}
+
+bool GameLevel::IsCompleted()
+{
+    for (GameObject &tile : this->Bricks)
+        if (!tile.IsSolid && !tile.Destroyed)
+            return false;
+    return true;
+}
+
+void GameLevel::init(std::vector<std::vector<unsigned int>> tileData, unsigned int levelWidth, unsigned int levelHeight)
+{
+    // calculate dimensions
+    unsigned int height = tileData.size();
+    unsigned int width = tileData[0].size(); // note we can index vector at [0] since this function is only called if height > 0
+    float unit_width = levelWidth / static_cast<float>(width), unit_height = levelHeight / height; 
+    // initialize level tiles based on tileData		
+    for (unsigned int y = 0; y < height; ++y)
+    {
+        for (unsigned int x = 0; x < width; ++x)
+        {
+            // check block type from level data (2D level array)
+            if (tileData[y][x] == 1) // solid
+            {
+                glm::vec2 pos(unit_width * x, unit_height * y);
+                glm::vec2 size(unit_width, unit_height);
+                GameObject obj(pos, size, ResourceManager::GetTexture("block_solid"), glm::vec3(0.8f, 0.8f, 0.7f));
+                obj.IsSolid = true;
+                this->Bricks.push_back(obj);
+            }
+            else if (tileData[y][x] > 1)	// non-solid; now determine its color based on level data
+            {
+                glm::vec3 color = glm::vec3(1.0f); // original: white
+                if (tileData[y][x] == 2)
+                    color = glm::vec3(0.2f, 0.6f, 1.0f);
+                else if (tileData[y][x] == 3)
+                    color = glm::vec3(0.0f, 0.7f, 0.0f);
+                else if (tileData[y][x] == 4)
+                    color = glm::vec3(0.8f, 0.8f, 0.4f);
+                else if (tileData[y][x] == 5)
+                    color = glm::vec3(1.0f, 0.5f, 0.0f);
+
+                glm::vec2 pos(unit_width * x, unit_height * y);
+                glm::vec2 size(unit_width, unit_height);
+                this->Bricks.push_back(GameObject(pos, size, ResourceManager::GetTexture("block"), color));
+            }
+        }
+    }
+}