{"schemaVersion":1,"record":{"key":"mechanic/spatial-interfaces--t304","type":"mechanic","id":"spatial-interfaces--t304","lang":"en","title":"Breathing, pulse and biosignals","summary":"A breathing action becomes a control signal. In Candle blowing near the microphone extinguishes a virtual flame; it measures air noise, not pulse.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/spatial-interfaces--t304/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/spatial-interfaces--t304.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/spatial-interfaces--t304.md","aliases":[],"tags":["Spatial and alternative interfaces","Mechanics and variants"],"sourceIds":["source-917b630098115bc7","source-92a25206afb3aea3"],"sources":[{"id":"source-917b630098115bc7","title":"Android Developers: Sensors overview","url":"https://developer.android.com/develop/sensors-and-location/sensors/sensors_overview","verifiedAt":null},{"id":"source-92a25206afb3aea3","title":"Candle - Ultra Real Blow Out","url":"https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"Biosignal or breathing input changes a game parameter from a measured feature while preserving calibration and voluntary opt-out."},{"id":"variants","title":"Variants","body":"### Mechanic variants\n\n<a id=\"t304-variants\"></a>\n\n- Breathing rhythm controls a fictional object's expansion. <a id=\"t304-v1\"></a>\n- Pulse input uses an actually available sensor. <a id=\"t304-v2\"></a>\n- Smoothing reduces random measurement jumps. <a id=\"t304-v3\"></a>\n- Manual substitutes preserve play without biosignals. <a id=\"t304-v4\"></a>"},{"id":"example","title":"Design example","body":"A virtual sail opens with a comfortable breathing rhythm that can be replaced by holding a button.\n\nPrototype check: Test consent, signal loss and personal calibration; a game indicator must not present medical conclusions."},{"id":"context","title":"Context and limits","body":"Spatial and specialized input requires calibration, clear action confirmation and a way to continue after signal loss. Each overview separates player actions, state changes and alternative rules. Examples are hypothetical design scenarios, not claims about a named game. A prototype check states an observable question for the next iteration. Existing detailed references remain separately linked from the direction map."}],"relations":[],"placements":[{"catalogId":"spatial-interfaces","id":"t304","title":"Spatial and alternative interfaces","url":"https://gamemechanics.pro/en/mechanics/spatial-interfaces/#t304","categoryIds":["mechanics"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Breathing, pulse and biosignals","description":"A breathing action becomes a control signal. In Candle blowing near the microphone extinguishes a virtual flame; it measures air noise, not pulse.","image":{"src":"images/mechanics/sensor-candle-0.webp","width":720,"height":1280,"crop":{"x":0,"y":330,"width":720,"height":950},"game":"Candle - Ultra Real Blow Out","sourceUrl":"https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4","originalUrl":"https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/2a/98/b9/2a98b919-8f7a-a15c-a1bc-7d52fc337ae5/mzl.fxebghmv.png/720x1440bb.jpg","credit":"Poets Road, Inc","rights":"© Poets Road, Inc. Developer-distributed App Store screenshot. All rights reserved; excluded from MIT and CC BY 4.0.","caption":"Candle: a virtual flame reacts to blowing into the microphone","alt":"Candle: a virtual flame reacts to blowing into the microphone","markers":[{"x":50,"y":43,"label":"The app maps blowing to the flame’s state"}]},"tips":["Distinguish microphone blowing from measurements by a dedicated biometric sensor."],"examples":[{"title":"Candle - Ultra Real Blow Out","url":"https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4"}]}},"endsAt":null,"provenance":"Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/spatial-interfaces"}}