Description

This project is a game completely made using C. The game is "Odyssey of Life", a multi-levelled game of three levels, which revolves around your punya gained(points scored) and 3 lokas i.e. bhu-loka , pathal-loka, swarg-loka. You start the game in bhu-loka and based on your punya you either get promoted to swarg-lok or get demoted to pathal-lok. There are some virtuous objects which increase your punya and also there are some bad objects which can decrease your punya.

Libraries

OpenGL and OpenAL are the two libraries which are used in making the project. OpenGL is a graphics library which is and abstarct API to draw 2D and 3D graphics and OpenAL is an environmental 3D audio library which is cross-platform audio API. The header files used under OpenGL library are glut,gl,glew,glu and under OpenAL, header files used are al,alc,alext and alut. Except these header files used are sndfiile and pthread.

Installation instructions

For cloning repository-

git clone https://github.com/GouriVerma/Game.git

For libraries installation

• For OpenGl :

  sudo apt install mesa-utils libgl1-mesa-dev
  

• For glut :

  sudo apt install freeglut3-dev
  

• For glew :

  sudo apt install libglew-dev
  

• For OpenAL :

  sudo apt install libopenal-dev
  

• For alut :

  sudo apt install libalut-dev
  

• For sndfile :

  sudo apt install libsndfile1-dev
  

• For soil :

  sudo apt-get install libsoil-dev
  

  Compiling the file

  cd Game
  gcc -o project project.c -lglut -lGL -lGLEW -lGLU -lglfw -lm -lSOIL -lpthread -lopenal -lsndfile -lalut
  

Game Insights

There are 3 levels in this game- Bhu-loka (level 0) from where the game starts, Patal-loka (level -1) and Svarga-loka (level 1). The character runs and encounter the obstacles in the course of its run and its score i.e punya decreases if it collides with obstacles on ground and its score i.e punya increases if it catches the things in air. If the score at the end of 2 minute is less than -1000 it gets teleported to level -1 and if it is greater than 2000, it gets teleported to level 1, else stays on the same level i.e level 0.

Game Controls

There are two things by which you can control the game- spacebar and left mouseclick. If spacebar is pressed, the character jumps and with the help of mouseclick you can navigate to different options on menupage- start, help or quit.

Code Insights

For displaying textures and graphics

• drawTexture() : It binds the texture with the ID texture to the 2D texture target in OpenGL which means that subsequent texture operations will affect this texture. It specifies the coordinates of the quadrilateral in which the texture is displayed.
• drawMovingTexture() : It is used to display the textures in loop on the screen. It is used to display the level 1 background and the moving part of level -1 background i.e rocks and platform.
• loadTextures() : It is for loading and displaying the character where there are the sprites of the character in loop in different levels.
• update() : It is a function which sets the framerate for the loadTextures()- the rate at which the different sprites of a character is dispalyed.

For displaying score and time

• drawTime() : It displays the timer on the top left on the screen. Its main work is to measure the time from the point game started and display it there.
• drawScore() : It displays the updated score on the top right theroughout the course of game.

For user-input

• keyCallback() : It takes the input of the spacebar press and makes the jumping to be true and accordingly set all the variables and make the character readty to jump.
• mouseClick() : It detects the mouseclick of the user and according to the region where user clicked-start,help,quit,next or back; it specifies the menu and help screens.

For rendering the different levels on screen

• playBhulok() : It is a group of functions which collectively displays background, character, obstacles, score and time of level 0. drawTexture() displays the static background, moving clouds, moving trees and obstacles. A snippet of code displays the sprites of character in loop.
• playPatallok() : Like the above, it is also a group of functions which is rendering background, character, obstacles, score and time of level -1 on screen. drawMovingTexture() is used to display the two mirror images of moving rocks and platform in loop, where one image moves to left and other is displayed next to it. A snippet of code displays the sprites of character in loop.
• playSwarglok() : As above two, the functions in it also collectively displays background, character, obstacles, score and time of level 1. drawMovingTexture() displays the level 1 background in loop, where one image moves to left and again it is rendered.

For loading textures in program and displaying it

• init() : It sets the the screen ready to display textures and loads all the images in the program which are being displayed during the game. It also loads the music file in the program.
• display() : This function checks some conditions and display the menu page and help pages accordingly. It checks the level and call the playBhulok(), playSwarglok() and playPatallok() accordingly. Also it displays all the transition screens between the levels.

For sound

• playBackgroundMusic() : It loads the sound file for background music and play it in loop until the game ends.
• playSound() : It loads the sound for obstacles and mouseclick and play it accordingly.

Contributors

• Ankit Kumar Singh (@ankitsingh37)
• Sai Nikhita Palisetty (@SaiNikhita-P)
• Saurav Kumar Singh (@sauravgithub-web)
• Sreekar Vetsa (@SreekarVetsa)
• Gouri Verma (@GouriVerma)