Wars is a small game made with C, SDL 2, and Lua 5.3 to show Lua capabilities
Wars game is played with the mouse moving the cursor around the screen and firing shots with a mouse click. The goal is to be an example for development with SDL 2 and Lua. It is a small game with infinite gameplay, you can press ESC to quit. It has some features like:
- Vector math in C
- Sprite, Font, Music, and SFX loading
- Independent game timing
- Simple animations
- Navigation grid for enemy movement
- Collision detection
- Random background scrolling
- Lua for scripting:
- Access to vector and rect structures with arithmetic operations
- Exposing custom libraries to Lua like drawing, sound, and fonts
- Calling script main functions to expose SDL events like mouse down, key press, etc
- Loading settings from a Lua script
This repository is used in an article on my blog, Game Development with Lua , in that article I explain in detail how some features from Lua were used in which case. You will find more examples than those mentioned. Here are some of the things you can find:
- Expose variables
- Expose functions
- Call Lua function and pass arguments
- Customize Lua path search for loading scripts
- Read integers, booleans, strings, and tables from a script
- Expose complex user data from C to Lua with complex operations using metatables
- Receive optional arguments in a C function call from Lua
- Return multiples arguments to Lua when calling a C function
- Receive the user data from Lua and check its metatable
- Create custom modules in C that can be imported in Lua with require
- Expose tables with fields and methods to Lua
Installation depends on the platform, in Ubuntu Linux:
sudo apt install libsdl2-dev libsdl2-ttf-dev libsdl2-image-dev libsdl2-mixer-dev liblua5.3-dev lua5.3 cmake
Most of the assets used are from the great free assets of Kenney.nl.