jungleengine / paper.io

A cross-platform online multiplayer game built with socket.io

Paper.io

A cross-platform online multiplayer game built with socket.io

Steps to run

• Install npm modules by running npm install .
• Run node Server.js .
• From any browser open index.html .

paper.io's Issues

Initializing player inside a block

in the server the player should start on his own block in a safe zone.

Time Step

the client needs to advance from block to block with a fixed time step that depends only on time and not on FPS
but drawing frames needs to be smooth and the player has to advance through each block in order to prevent him from jumping over other players when the game is laggy.

Reference for the issue and semi-solution

Filling

when the player enters his own region the area should be filled.

Scaling the blocks

Blocks should be scaled to fit a fixed number of blocks in each window

Server's direction of players is wrong

Server has different direction than that of a player.
most of the time it sends a different direction.

Possible Hack

The action should only be applied when the head of the player is at the end of the block depending on the direction of the player the end of the block.
Here we apply the action if the player is at the end of the block or at the beginning of another one.

position % block_size shouldn't be used.

https://github.com/AhmedSa-mir/Paper.io/blob/506dc9f8b43c3ce0bb049ade07fd833414b83a94/gamemechanics.js#L82-L83

Server Simulates Logic of players

In Server.js, for each room:

• function Simulate() should iterate over the players.
• Each player is moved by delta time and it's speed of moving from start of a block till the end of it.
• If the new position will cause the player to jump cells then it should first iterate on each cell it would jump.
• If the player was registered to move and the player reached the end of the cell:
  1. The player changes directions.
  2. Each user in the room receives either the grid or run length of the grid.