p∞ng

Multiplayer polygon Pong — one always-on arena where players sit on the edges of a regular N-gon (minimum 4 sides, up to 32 players). Each player has their own ball and scores by shooting it into another player's goal. Every client sees the arena from their own perspective with their paddle at the bottom.

Stack

• Rust + Axum — game simulation, HTTP, WebSocket, SSE
• Datastar — real-time scoreboard and activity feed via SSE
• WebSocket — paddle input and game state at ~30 Hz
• Canvas — POV-rotated arena rendering

Run

cargo run

Open http://localhost:8197 in one or more browser tabs. Use ← → (or A / D) to move your paddle.

Architecture

Transport	Purpose
POST /join	Drop-in join with optional reconnect via player_id
GET /events	Datastar SSE — scoreboard, activity feed, player count
GET /ws?player_id=	Game state snapshots + paddle input

Empty edges on a sub-4-player quadrilateral are solid walls. When a player leaves, the polygon reshapes after a 30s reconnect window.