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Animal Slaughter House

How to play

  • First, start nodejs server
    • To start the server, input command node index.js in path AnimalSlaughterHouse/sever
  • Second, run client
    • To run the jar, input command java -jar .\desktop-1.0.jar [ip]
    • WASD to move, click to shoot.

Brief introduction

  • A primitive 2D game implemented with LibGDX.
  • Features: Multiplayer, online battle-royale.
  • Basic settings
    • Each player has 100 HP at the beginning.
    • Every player will be spawned in the bottom left corner of the entire map.
    • There are a few drop points scattered in the world where you can pick up a specific weapon. After that, you can use your current weapon to attack other players on the server.
    • Kill all players on the server and survive to the end to win!

Main Framework

framework2

A few points to note

1. Box2d physics engine

  • Our game engine uses Box2d, and there is a slight recoil when firing.

2. Projectile class as an example of sprite

  • Everything shown in the screen is a sprite.
  • Projectile inherits from Sprite class of LibGDX.

3. implementation of online multiplayer

We used socket.io to implement our online multiplayer. Socket.io is event-driven and is We made the server using node.js to simplify the work. There is a host that actually update the world, other players(slaves) only listen to the host and update from the host.

  • For every frame, the host pack sprites in the world into a json file to synchronize all clients.

4. drawing map and sprites

LibGDX offers a way to create textures for sprites. For each frame sprites are batched and rendered.

  • map: We use Tiled(https://www.mapeditor.org/) to make our map, and loaded by class ==TmxMaPLoader==.
  • sprites: most pixelated pictures found online. All sprites are rendered in ==PlayScreen== and some of the sprites are animated by a series of pictures.

5. bgm & sound effect

We implement sound using LibGDX native libraries, BGM is made by us and copyleft.

6. particle effect

particle effects are provided by LibGDX. These effects, generally speaking, are also sprites.