game/tetris/tetris.cpp

#include "../sdlpp/sdlpp.hpp"
#include "config.hpp"
#include "custom_classes.hpp"
#include "scenes.hpp"
#include "global_vars.hpp"
#include "functions.hpp"
#include <thread>
#include <chrono>
#include <mutex>
#ifdef _WIN32
#include "../SDL2/SDL2_framerate.h"
#include <ctime>
#include <string>
#include <windows.h>
#else
#include <SDL2/SDL2_framerate.h>
#endif // UNIX

std::vector< std::shared_ptr< SDLPP::RenderObject > > line_coliders{};

void updateScore( std::shared_ptr< SDLPP::Font > font ) {
    g_score_texture->setText( *font, std::to_string( g_score ), colors["text"],
                              colors["text_out"], 5 );
}

void doInput() {
    FPSmanager gFPS;
    SDL_initFramerate( &gFPS );
    SDL_setFramerate( &gFPS, 200 );
    auto base = SDL_GetTicks();
    while ( !g_quit ) {
        base = SDL_GetTicks();
        SDL_framerateDelay( &gFPS );
        g_input_functions.back()( g_main_scene, base, line_coliders );
    }
}

void prepareShadowColider( std::shared_ptr< SDLPP::Renderer > r ) {
    g_shadow_colider = std::make_shared< SDLPP::RectangleRender >(
        0, TOP_BORDER, BLOCK_SIZE, BOTTOM_BORDER - TOP_BORDER, r );
    g_shadow_colider->addCollision(
        SDLPP::RectColider( 0.1, 0.01, 0.8, 0.98 ) );
    g_shadow_colider->setId( COLIDER_ID );
    g_shadow_colider->setStatic();
    g_shadow_colider->centerX();
}

#ifdef _WIN32
int WINAPI wWinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
                     PWSTR szCmdLine, int nCmdShow ) {
#else
int main() {
#endif
    SDLPP::init();
    SDLPP::Window w( "Tetris clone!" );
    w.setResizable( true );

    auto renderer = std::make_shared< SDLPP::Renderer >( w );
    g_active_renderer = renderer;
    renderer->setBlendMode( SDL_BLENDMODE_BLEND );
    prepareShadowColider( renderer );

    g_font = std::make_shared< SDLPP::Font >( "testfont.ttf", 36 );

    g_main_scene = prepareMainScene( renderer, g_font );
    line_coliders = g_main_scene->getObjects( { COLIDER_ID } );
    g_score_texture = std::dynamic_pointer_cast< SDLPP::TextRenderer >(
        g_main_scene->getObjects( { SCORE_TEXTURE_ID } )[0] );
    g_active_scenes.push_back( g_main_scene );
    g_main_scene->saveScene();

    g_menu_scene = prepareMenuScene( renderer, g_font );
    g_game_over_scene = prepareGameOverScene( renderer, g_font );
    g_options_scene = prepareOptionsScene( renderer, g_font );

    auto base = SDL_GetTicks();
    int frames = 0;
    std::srand( std::time( nullptr ) );

    FPSmanager gFPS;
    SDL_initFramerate( &gFPS );
    SDL_setFramerate( &gFPS, 60 );

    std::thread inputThread( doInput );
    inputThread.detach();

    g_next_object = g_tetrisFunctions[std::rand() / ( ( RAND_MAX + 1u ) / 7 )](
        renderer, g_main_scene );
    g_next_object->setPos( 0.9, 0.5 );
    g_input_functions.push_back( mainSceneInput );

    while ( !g_quit ) {
        SDL_PumpEvents();
        SDL_framerateDelay( &gFPS );
        if ( !g_cur_object && g_checked_line ) {
            std::lock_guard< std::mutex > guard( g_movement_mutex );
            if ( !g_next_object ) {
                g_next_object =
                    g_tetrisFunctions[std::rand() / ( ( RAND_MAX + 1u ) / 7 )](
                        g_main_scene->getRendererShared(), g_main_scene );
                g_next_object->setPos( 0.9, 0.5 );
            }

            g_cur_object = g_next_object;
            g_cur_object->setPos( 0.5, TOP_BORDER - BLOCK_SIZE );
            g_cur_shadow = g_cur_object->copySelf();
            g_cur_shadow->turnIntoShadow();
            for ( auto &piece : g_cur_shadow->getObjects() ) {
                // make it so shadow gets covered by g_cur_object
                g_main_scene->moveZ( piece, -4 );
            }
            updateShadow( *g_main_scene );

            auto rand_index = std::rand() / ( ( RAND_MAX + 1u ) / 7 );
            int retries = 0;
            while ( g_bag[rand_index] < 4 ) {
                rand_index = ( rand_index + 1 ) % 7;
                retries++;
                // bag is empty
                if ( retries == 7 ) {
                    g_game_over_scene->updateSizeAndPosition();
                    g_active_scenes.push_back( g_game_over_scene );
                    g_input_functions.push_back( gameOverSceneInput );
                    break;
                }
            }
            g_next_object.reset();
            g_next_object =
                g_tetrisFunctions[rand_index]( renderer, g_main_scene );
            g_next_object->setPos( 0.9, 0.5 );
            g_checked_line = false;
        }
        if ( g_update_score ) {
            updateScore( g_font );
            g_update_score = false;
        }
        if ( g_update_colors ) {
            updateColors();
            g_update_colors = false;
        }

        renderer->clearRenderer();
        for ( auto &x : g_active_scenes ) {
            x->renderScene( false );
        }
        renderer->presentRenderer();
        g_wait_for_anim = false;
        frames++;
        if ( SDL_GetTicks() - base >= 1000 ) {
            base = SDL_GetTicks();
            std::cout << "FPS: " << frames << std::endl;
            frames = 0;
        }
    }

    return 0;
}