Ace17 / eelusion

Eelusion

Author: Sebastien Alaiwan

Demo

An online demo is available here:

http://code.alaiwan.org/games/eelusion

Description

This is a compo game for the LD45 game jam. The theme was "Start With Nothing".

It's a tiny castlevania-like game which can be compiled to native code, or, using Emscripten, to asm.js (=javascript).

It uses SDL2, and the OpenGL ES2 3.0 profile.

This code also shows how to isolate game logic code (doors, switches, powerups, bullets, ..) from I/O code (display, audio, input).

Directory structure

bin:            output directory for architecture-specific executable binaries.
res:            output directory for game resources (e.g. sounds, music, sprites, tilesets).
res-src:        source files for game resources.
src:            source files for the game logic (agnostic to the engine implementation).
engine/src:     I/O code (=engine), mostly game-agnostic.
engine/include: interfaces for communication between the game logic and the I/O code. Also contains shared low-level utilities (e.g Vector2f, Span, etc.).
./check:        main check script. Call this to build native and asmjs versions and to launch the unit tests.

Build

Requirements:

* libsdl2-dev
* libogg-dev
* libvorbis-dev

It can be compiled to native code using your native compiler (gcc or clang):

$ make

The binaries will be generated to a 'bin' directory (This can be overriden using the BIN makefile variable).

It can also be compiled to Javascript, using Emscripten. In theory, it's as simple as:

$ CXX=emcc make

However, in practice, more options need to be injected to the makefile, like setting EXT (program extension) to ".html", etc. There's a make wrapper that does exactly that:

$ ./scripts/asmjs-make

Run the game

Just run the following command:

$ bin/rel/game.exe

Thanks to:

• llexandro from DevianArt (Textures)