{"schemaVersion":1,"record":{"key":"mechanic/phone-magnetometer--family-02","type":"mechanic","id":"phone-magnetometer--family-02","lang":"en","title":"Rotation over time","summary":"Changes in heading or field components over time can define a turn, sequence or rhythmic gesture in a game scenario.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/phone-magnetometer--family-02/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/phone-magnetometer--family-02.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/phone-magnetometer--family-02.md","aliases":["Turns over time"],"tags":["Phone magnetometer interactions","Mechanics catalog"],"sourceIds":["source-603978442e60360e"],"sources":[{"id":"source-603978442e60360e","title":"Physics Toolbox Magnetometer","url":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"A change in direction over time sets the turn, sequence, or rhythm of an action; For sustainability, the environment is taken into account."},{"id":"variants","title":"Variants","body":"### Variants and applications\n\n<a id=\"family-02-variants\"></a>\n\n- Sequence of directions. Action: Turn to several azimuths in a given order. Application: Combination lock, ritual route, command repetition. Limitations: Separate the achieved sector from a random intersection along the way. Equipment: Telephone without an external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m009\"></a>\n- Code with direction of rotation. Action: Distinguish between approaching a corner clockwise and counterclockwise. Application: Safe, rotating mechanism, navigation riddle. Limitations: You need to turn the corner through the transition 359→0 degrees. Equipment: Phone without an external magnet. Preparation: Needs setup. Type: Game rule. <a id=\"variant-m010\"></a>\n- A few turns. Action: Count complete turns and their direction. Application: Start a mechanism, wind a rope, load an artifact. Limitations: Count angle increments; turning too fast requires a gyroscope. Equipment: Phone without external magnet. Preparation: Needs setup. Type: Game rule. <a id=\"variant-m011\"></a>\n- Staying on course. Action: Maintain the direction inside the window for several seconds. Application: Antenna stabilization, concentration, channel protection. Limitations: Use the tolerance window and pause when the compass is unreliable. Equipment: Phone without an external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m012\"></a>\n- Rhythm of turns. Action: Reach corner sectors on the beat. Application: Dance game, musical battle, light conductor. Limitations: The event of entering a sector is better assessed with a time window. Equipment: Phone without an external magnet. Preparation: Needs setup. Type: Game rule. <a id=\"variant-m013\"></a>\n- Swinging between boundaries. Action: Alternately achieve two given directions. Application: File, pendulum, rocking a boat, bellows. Limitations: Determine a complete cycle between boundaries, and not count noise. Equipment: Telephone without an external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m014\"></a>\n- Turning speed. Action: Link the rate of change of world azimuth with the power of the action. Application: Acceleration of a vortex, panorama control, dosing of rotation. Limitations: The compass derivative is noisy; combination with a gyroscope is practically useful. Equipment: Phone without an external magnet. Preparation: Needs setup. Type: Input method. <a id=\"variant-m015\"></a>\n- Tracking moving azimuth. Action: Keep the phone on the target's direction, changing over time. Application: Satellite tracking, radar alignment, duel of attention. Limitations: Target speed and tolerance must take into account the delay of the sensors. Equipment: Phone without an external magnet. Preparation: Easy start. Type: Game rule. <a id=\"variant-m016\"></a>"},{"id":"context","title":"Context and limits","body":"Author's working classification for designing games and interactions. Options can overlap and combine; the list is not a generally accepted standard or proven exhaustive list. Application examples are conditional unless a specific verifiable observation is indicated nearby. Sources support individual techniques and technical limitations."}],"relations":[],"placements":[{"catalogId":"phone-magnetometer","id":"family-02","title":"Phone magnetometer interactions","url":"https://gamemechanics.pro/en/mechanics/phone-magnetometer/#family-02","categoryIds":["section-1"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Turns over time","description":"Changes in heading or field components over time can define a turn, sequence or rhythmic gesture in a game scenario.","image":{"src":"images/mechanics/sensor-physics-magnet-0.webp","width":665,"height":1440,"crop":{"x":51,"y":323,"width":563,"height":1034},"game":"Physics Toolbox Magnetometer","sourceUrl":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4","originalUrl":"https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0f/3d/af/0f3daf9c-4f2c-17c7-83d3-c4ae62057601/01-magnetometer.png/720x1560bb.jpg","credit":"Chrystian Vieyra","rights":"© Chrystian Vieyra. Developer-distributed App Store screenshot. All rights reserved; excluded from MIT and CC BY 4.0.","caption":"Physics Toolbox: three field components and total magnitude over time","alt":"Physics Toolbox: three field components and total magnitude over time","markers":[{"x":50,"y":67,"label":"Curves show measurements changing over time"}]},"tips":["Compare changes with a baseline and account for external magnetic fields."],"examples":[{"title":"Physics Toolbox Magnetometer","url":"https://apps.apple.com/us/app/physics-toolbox-magnetometer/id1003749103?uo=4"}]}},"endsAt":null,"provenance":"Original editorial design catalog consolidated from project discussions on 2026-10-20. Complete discussion item lists and contextual limitations are preserved; linked primary sources support specific techniques, not the entire classification. English translation was prepared with machine assistance and editorial review.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/phone-magnetometer"}}