RCWeb Symbol-Snap Control

The Symbol-Snap Control app (app/symbol-snap-control) is the phone companion for app/symbol-snap. Every controller in the room receives the same eight-symbol card and competes to tap the one symbol that also appears on the main display.

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What it does

• Shared card competition: Every connected phone displays the same controller card so the race is about recognition speed, not hidden information.
• Tap-to-score input: Players tap symbols directly on the card canvas and the first correct choice wins the point.
• Personal identity and feedback: Each controller keeps a local player name, receives targeted success or miss feedback, and shows its own score plus the current leader.

How it works

• Thin controller, smart viewer: The controller only announces its presence, sends tap attempts, and renders the viewer-provided card layout.
• Sprite-sheet rendering: It loads the shared /symbol-snap/symbol-snap.png sprite sheet and draws the symbols onto a <canvas> with the same random rotation, scale, and circular placement chosen by the main viewer.
• Persistent sync loop: Controllers re-announce themselves every few seconds so they can join a room after the display is already live or recover cleanly after a reconnect.

Launch RCWeb App