PixelFaucet Game

PixelFaucet is a "Game Engine" written in the Crystal programming language and uses SDL under the hood to create a window, draw pixels, and expose hardware interfaces.

See the examples.

The examples can either be run with crystal run examples/<name>.cr from the root of the repo, or be all built by running the ./scripts/build_examples.rb script. This will place the binaries in the examples/build folder.

Setup

PixelFaucet requires the crystal compiler which can be installed via homebrew

• Install crystal

brew install crystal

• Install sdl3

brew install sdl3
brew install sdl3_image

• Create a new project:

crystal init app my_game

• Add the dependency to your shard.yml:

dependencies:
  pixelfaucet:
    github: sleepinginsomniac/pixelfaucet
    version: 0.2.2 # Or the current version

• Run the shards command:

shards install

Usage

The engine works be subclassing the PF::Game which requires two methods be defined:

require "pixelfaucet"

class Static < PF::Game
  # Called every game tick
  def update(delta_time : Time::Span)
  end

  # Called at a rate to satify `fps_limit` (Float::INFINITY by default)
  def frame(delta_time)
    window.lock do
      window.clear
      window.each_point { |p| window.draw_point(p, PF::RGBA.random) }
    end
  end
end

e = Example.new(100, 60, 5)
e.run!

Drawing methods come from PF2d. PF::Window and PF::Sprite implement the PF2d::Canvas(PF:RGBA) module which provides methods for drawing points, lines, rects, circles, bezier curves, triangles, and more.

Documentation

Run crystal docs to generate documentation. The documentation can then be found under the docs folder.

Contributing

1. Fork it (https://github.com/sleepinginsomniac/pixelfaucet/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Alex Clink - creator and maintainer