gameBasics.cpp

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#include <chrono>
#include <thread>
#include "game.h"
#include "playMode.h"
#include "pixelManager/goodPixelManager.h"
 
#define WININIT window("SUPER Space Invader : Turbo Apocalypse DX - VS GOD", Position(1280, 720), Position(128, 128), nsGraphics::KBlack)
 
Game::Game() : WININIT {
 
    if(!reloadConfig()){ // Config
        throw runtime_error("Initial config loading failed. Please check the error above and fix the configuration");
    }
 
    // Pixel Manager
    if(confData.theme=="good"){
        pm = std::make_unique<GoodPixelManager>(window);
    }else if(confData.theme=="bad"){
        pm = std::make_unique<PixelManager>(window);
    }else throw runtime_error("Invalid theme value : "+confData.theme+
    "\nValid values are : good,bad");
 
    cout << "Loading sprites..." << endl;
    vector<Task> tasks;
    chrono::high_resolution_clock::time_point start = chrono::high_resolution_clock::now();
 
    pm->loadSprites(tasks);
    for(Task& f : tasks)f.wait();
 
    // We just do that for one sprite, so I didn't bother creating an 'API' for that
    pm->leftHand.mirror(pm->rightHand);
 
    chrono::high_resolution_clock::duration elapsed = chrono::high_resolution_clock::now()-start;
    cout << "Done ! Time : " << chrono::duration_cast<chrono::milliseconds>(elapsed).count() << "ms" << endl;
 
    sm.readFile(); // Score manager
}
 
bool Game::areThereInvadersLeft(){
    return grid.validColsNumber() > 0;
}
 
void Game::handleScoreSaving(){
    for(unsigned i=0;i<players.size();++i){
        string pName;
        pm->askPlayerNameMenu(i, players[i].score, pName);
        sm.inputScore(move(pName), players[i].score);
    }
    sm.writeFile();
}
 
void Game::managedGames() {
 
    playMode = PlayMode::NONE;
    WinValue whoWon; 
 
    while(playMode!=PlayMode::EXIT){
        if(playMode==PlayMode::NONE){
            playMode = pm->showInitialMenu();
        }else{
            DEBUG_MSG("Starting game")
            initGame();
            whoWon = enterGameLoop(); // will read the playMode
            DEBUG_MSG("END End of game")
            handleScoreSaving();
            if(!pm->showDeathMenu(sm.scores, whoWon))playMode = PlayMode::NONE;
        }
    }
}
 
// we assume the game has been played before, and so we need to clean used members
void Game::initGame(){
    grid = confData.grid; // will copy the grid
 
    // we re-construct players objects, we don't have to clear all members and can rely on the construction value (set in .h file)
    players.clear();
 
    missiles.clear();
    god.state = GodState::NONE;
    torpedos.clear();
 
    if(playMode==PlayMode::SINGLE){
        players.resize(1);
    }else{
        players.resize(2);
        // mirror the start X Position for the other
        players[1].x = pm->getScreenWidth() - confData.startXPosition - confData.playersWidth;
    }
    players[0].x = confData.startXPosition;
 
    for(unsigned i=0;i<players.size();++i){
        players[i].id = i;
        players[i].lives = confData.playersLives;
    }
 
    baseInvPos = Position(200, 0);
    direction = true;
 
}
 
#define START_TIMER() DEBUG_INSTR(debugTime = chrono::high_resolution_clock::now())
#define PRINT_TIMER(X) DEBUG_MSG((X) << ": " << chrono::duration_cast<chrono::nanoseconds>(chrono::high_resolution_clock::now()-debugTime).count())
 
WinValue Game::enterGameLoop(){ // returns when game is finished
    // computed in advance for performance reasons
    chrono::milliseconds maxFrameTime = chrono::milliseconds(1000/confData.maxFPS);
 
    unsigned tmpFps = 0;
    unsigned fps = 0;
    typedef chrono::high_resolution_clock::time_point MyTimePoint;
    MyTimePoint fpsStartTime = {};
 
    while(window.isOpen()){
 
        MyTimePoint startTime = chrono::high_resolution_clock::now();
        if(fpsStartTime.time_since_epoch()==chrono::seconds(0)){
            fpsStartTime = startTime;
        }
 
        pm->startFrame();
 
        managePlayers();
        if(manageInvaders()) { // if they went down
            if (invadersTouchPlayer())return WinValue::INVADERS;
            tryAwakeGod();
        }
 
        if(manageGod())return WinValue::PLAYERS;
        if(arePlayersDead())return WinValue::GOD;
 
        moveMissiles();
        remCollidingProjectiles();
        moveTorpedos();
        remCollidingProjectiles();
 
        checkMissilesAndPlayers();
        if(checkTorpedosAndInvaders())return WinValue::PLAYERS;
 
        if(arePlayersDead())return WinValue::INVADERS;
 
        displayAll(fps);
 
        pm->endFrame();
 
        MyTimePoint endTime = chrono::high_resolution_clock::now();
 
        // This code is counted as part of frames, but that's not really something we can control
        if(fpsStartTime+chrono::seconds(1) < endTime){
            fps = tmpFps;
            tmpFps = 0;
            fpsStartTime = {};
        }else ++tmpFps;
 
        this_thread::sleep_until(startTime+maxFrameTime);
    }
 
    return WinValue::NOBODY;
}
 
Position Game::invIndexToPos(unsigned x, unsigned y) const {
    return baseInvPos + Position(INV_GET_SINGLE_POS(x), INV_GET_SINGLE_POS(y));
}
 
bool Game::arePlayersDead() {
    return all_of(players.begin(), players.end(), [](Player& p) -> bool {return p.isEliminated();});
}