Galaxy Sandbox Online

Welcome to Galaxy Sandbox Online! Join your friends and play with this open gravity physics sandbox. Click and drag to spawn planets, scroll while dragging to change planets' size and mass.

** If the "Connecting to Server..." text appears while playing, try R to refresh or press T twice to turn Online mode off and back on again.

Controls

LMB(Hold) - Begin spawning object

LMB(Aim) - Set object velocity/trajectory

LMB(Release) - Spawn object

WASD - Move camera or scale object

Scroll - Zoom camera or scale object

Z/C - Change spawn texture

R - Refresh connection (use if game freezes)

T - Switch between Offline/Online modes*

*Offline mode requires more CPU to run the local simulation

About

When running the game in online mode, the simulation is handled by a Go server that every client connects to via Websocket. Periodic state updates are sent back to clients, and clients can request to add planetoids.