machaju / sdl-pong

pong implementation with sdl

sdl-pong 🕹

Here is a simple pong implementation with SDL2.

SDL2 is a cross platfrom library that provides low-level access to computer hardware. It is responsible for the windowing, capturing the user input and rendering the objects to the screen.

Exexute c++ on the web :)

asm.js/wasm live demo: https://machaju.github.io/sdl4pong/

Take a look at the top-level CMake for instructions on compiling for the web. Also take note of emscripten_set_main_loop(frame_wrapper, 0, 0); in main.cpp.

REQUIREMENTS

• SDL2
• SDL_IMAGE
• SDL_TTF

The CMakeFinds in cmake/modules should take care of finding these libraries once they are installed.

Building Locally 👷‍♀️🚧

Clone the Repo

> git clone https://github.com/machaju/sdl-pong.git
Cloning into 'sdl-pong'...

Verify Target System

By default, the target set is set to "web", which will build .js files instead of a c++ executable.

Change this line in CMakeLists.txt from "web" to "auto".

#edit this line to change compile target 
set(EXPORT_TARGET "auto")

Build the project

cd sdl-pong
mkdir build
cd build 
cmake ..
make -j4

Run SDL4Pong

./SDL4Pong

An SDL window should appear with the game ready to play!

Play!

Left Click to begin.

Move your paddle using your mouse or trackpad. The paddle only moves in the Y direction, so no need to worry about horizontal movement.

Try to get the ball past the enemy paddle.

Enemy Paddle

The Enemy paddle will track the ball "imperfectly" using a buffer to slow the paddle down when it gets close to the ball.

Difficulty 🔥

You can change the difficulty in GameScene.cpp.

Possible selections include:

• EASY
• MEDIUM
• HARD

By default the difficulty is set to HARD.

GameScene::GameScene() {

    // set difficulty
    DIFFICULTY diff = DIFFICULTY::HARD;

ASSETS

I drew glow-ball.png and glow-paddle.png in AffinityDesigner but you can swap them out for better graphics if you'd like, just make sure the names remain the same.

I'm using and open font called Alieron for the scores.