Game.cpp

#include "Game.h"

bool Game::Initialize()
{
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
        return false;
    }

    window = SDL_CreateWindow(WINDOW_TITLE,
        SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
    if (!window) {
        SDL_Log("Failed to create window: %s", SDL_GetError());
        return false;
    }

    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    if (!renderer) {
        SDL_Log("Failed to create renderer: %s", SDL_GetError());
        return false;
    }

    isRunning = true;
    ticksCount = SDL_GetTicks();

    return true;
}

void Game::RunLoop()
{
    while (isRunning) {
        ProcessInput();
        UpdateGame();
        GenerateOutput();
    }
}

void Game::ProcessInput()
{
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        switch (event.type) {
            case SDL_QUIT:
                isRunning = false;
                break;

            case SDL_KEYDOWN:
                if (event.key.keysym.sym == SDLK_ESCAPE) {
                    isRunning = false;
                } else {
                    ProcessKeydown(event.key.keysym.sym);
                }
                break;
        }
    }
}

void Game::UpdateGame()
{
    while (!SDL_TICKS_PASSED(SDL_GetTicks(), ticksCount + 16)) {
    }

    float deltaTime = (SDL_GetTicks() - ticksCount) / 1000.0f;
    if (deltaTime > 0.05f) {
        deltaTime = 0.05f;
    }
    ticksCount = SDL_GetTicks();

    UpdateGame(deltaTime);
}

void Game::Shutdown()
{
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
}