Tetris Game in C++

Tetris game program in C++

Welcome to Programming Chaska! In this post, I will share the program in C++ to make the classic Tetris Game in a unique design. Make sure to Subscribe to Programming Chaska to get latest updates

Note- You must have the SFML library installed and included its path to your Programming IDE.

Game Preview:

Game Controls:

Left arrow Key - To move the tile Left 

Right arrow Key - To move the tile Right 

Up arrow Key - To Transform the tile shape

Down arrow Key - To increase the falling-down speed of the tile

Steps to make Game:

1. Make a new folder (say tetris).
2. In tetris folder make your .cpp file (say main.cpp) and a folder whose name must be "images".
3. Download All the images given below and keep them in the "images" folder with their specific name as given below each image.
4. Copy and Compile the code given below to generate its executable (.exe) file.
5. At last, Run that .exe file to play the game.

Images Used:

background.png

tiles.png

frame.png

Game Code:

#include <SFML/Graphics.hpp>
#include <time.h>
using namespace sf;
const int M = 20;
const int N = 10;
int field[M][N] = {0};
struct Point
{int x,y;} a[4], b[4];
int figures[7][4] =
{
    1,3,5,7, // I
    2,4,5,7, // Z
    3,5,4,6, // S
    3,5,4,7, // T
    2,3,5,7, // L
    3,5,7,6, // J
    2,3,4,5, // O
};
bool check()
{
   for (int i=0;i<4;i++)
      if (a[i].x<0 || a[i].x>=N || a[i].y>=M) return 0;
      else if (field[a[i].y][a[i].x]) return 0;
   return 1;
};

int main()
{
    srand(time(0));     
    RenderWindow window(VideoMode(1080, 1020), "The Game!");
    Texture t1,t2,t3;
    t1.loadFromFile("images/tiles.png");
    t2.loadFromFile("images/background.png");
    t3.loadFromFile("images/frame.png");
    Sprite s(t1), background(t2), frame(t3);
    int dx=0; bool rotate=0; int colorNum=1;
    float timer=0,delay=0.3; 
    Clock clock;
    while (window.isOpen())
    {
        float time = clock.getElapsedTime().asSeconds();
        clock.restart();
        timer+=time;
        Event e;
        while (window.pollEvent(e))
        {
            if (e.type == Event::Closed)
                window.close();
            if (e.type == Event::KeyPressed)
              if (e.key.code==Keyboard::Up) rotate=true;
              else if (e.key.code==Keyboard::Left) dx=-1;
              else if (e.key.code==Keyboard::Right) dx=1;
        }
    if (Keyboard::isKeyPressed(Keyboard::Down)) delay=0.05;
    //// <- Move -> ///
    for (int i=0;i<4;i++)  { b[i]=a[i]; a[i].x+=dx; }
    if (!check()) for (int i=0;i<4;i++) a[i]=b[i];
    //////Rotate//////
    if (rotate)
      {
        Point p = a[1]; //center of rotation
        for (int i=0;i<4;i++)
          {
            int x = a[i].y-p.y;
            int y = a[i].x-p.x;
            a[i].x = p.x - x;
            a[i].y = p.y + y;
           }
           if (!check()) for (int i=0;i<4;i++) a[i]=b[i];
      }
    ///////Tick//////
    if (timer>delay)
      {
        for (int i=0;i<4;i++) { b[i]=a[i]; a[i].y+=1; }
        if (!check())
        {
         for (int i=0;i<4;i++) field[b[i].y][b[i].x]=colorNum;
         colorNum=1+rand()%7;
         int n=rand()%7;
         for (int i=0;i<4;i++)
           {
            a[i].x = figures[n][i] % 2;
            a[i].y = figures[n][i] / 2;
           }
        }
         timer=0;
      }
    ///////check lines//////////
    int k=M-1;
    for (int i=M-1;i>0;i--)
    {
        int count=0;
        for (int j=0;j<N;j++)
        {
            if (field[i][j]) count++;
            field[k][j]=field[i][j];
        }
        if (count<N) k--;
    }
    dx=0; rotate=0; delay=0.3;
    /////////draw//////////
    window.clear(Color::White);    
    window.draw(background);
          
    for (int i=0;i<M;i++)
     for (int j=0;j<N;j++)
       {
         if (field[i][j]==0) continue;
         s.setTextureRect(IntRect(field[i][j]*18,0,18,18));
         s.setPosition(j*18,i*18);
         s.move(28,31); //offset
         window.draw(s);
       }
    for (int i=0;i<4;i++)
      {
        s.setTextureRect(IntRect(colorNum*18,0,18,18));
        s.setPosition(a[i].x*18,a[i].y*18);
        s.move(28,31); //offset
        window.draw(s);
      }
    window.draw(frame);
    window.display();
    }
    return 0;
}

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