ecs-pong

Pong game to practice ECS pattern, new C++17 features, SFML library and basic physics.

Build and run

Build tool required: scons

$ cd ecs-pong/
$ scons
$ ./ecs-pong

Features

• Player bat controlled with user mouse
• Basic AI bat handling multiple balls
• Number of balls increases as game advance
• Brick walls behind player and AI bats
  • Destroyed on ball contact
  • Restored when scored on

ECS

This little project proved me that the ECS pattern is really for game development, the extensibility is key.

Current model

Components (with fields):

AI ()
Body (Circle (Radius) | Rectangle (Width, Height))
Bound (Min (X, Y), Max (X, Y))
Brick (With)
Contact (Normal (X, Y), TrueNormal (X, Y), Penetration, With)
Fade (Diff, Alpha)
Input ()
Movement (Velocity (X, Y))
Position (Coords (X, Y))

Entities (with components):

Ball (Body, Movement, Position)
Bot (AI, Body, Bound, Position)
Player (Body, Bound, Input, Position)
Wall (Body, Position)
Brick (Body, Position, Brick)

Systems (with components and in order):

Input (Input, Position)
AI (AI, Position)
Bound (Bound, Position)
Collision (Body, Movement, Position)
Impulse (Contact, Movement, Position)
Movement (Movement, Position)
Game (Movement, Position)
Fade (Body, Fade)
Render (Body, Position)

Possible improvements

• Improve the AI behavior
• Add menus and game modes
• Add collision between balls
• Avoid collision tunneling
• And many more...