eSports Event Venue Layout and Equipment Wiring Planning Tool

I created this tool to help plan gaming machines, monitors, power supplies, and cables for eSports tournaments. You can try it right away from GitHub.
※Data from testing via GitHub is recorded on your device and does not remain on the server.

Main Features
⭐Floor Plan Creation⭐ — Draw polygonal rooms by clicking grid points
⭐Equipment Placement⭐ — Place fixtures (desks, chairs, power/LAN outlets) and devices (PCs, monitors, gaming consoles, and 17 other types) via drag & drop. Supports moving, 90° rotation, resizing, and renaming
⭐Cable Wiring⭐ — Connect devices via cables between ports. Includes compatibility checking for port types (HDMI / USB / LAN / Power) and IN/OUT direction checking to prevent physically impossible wiring
⭐Cable Length Calculation⭐ — Automatically calculates and displays the minimum required cable length from distances on the layout (1 grid = 0.25m, etc., with auto-scaling based on zoom)
⭐Required Equipment Checklist⭐ — Automatically tallies placed equipment and cables with quantities and lengths. Check states are also saved, and text copying allows sharing as a shopping list
⭐Power Connection Warning⭐ — Displays a ⚡ badge on devices without power (also supports USB power)
⭐Custom Device Registration⭐ — Freely define name, color, and port configuration. Can also duplicate and edit existing devices
⭐Save⭐ — Auto-save to local storage + JSON file export/import