--- key: mechanic/phone-camera--family-motion-2d type: mechanic id: phone-camera--family-motion-2d lang: en title: Motion in the image plane summary: >- Frames become movement directions and paths. Active Arcade reads player motion through the camera; the phone needs a stable position and a clear body view. updatedAt: '2026-10-22' status: active url: >- https://gamemechanics.pro/en/knowledge/mechanic/phone-camera--family-motion-2d/ jsonUrl: >- https://gamemechanics.pro/api/v1/knowledge/en/mechanic/phone-camera--family-motion-2d.json markdownUrl: >- https://gamemechanics.pro/content/knowledge/en/mechanic/phone-camera--family-motion-2d.md aliases: [] tags: - Phone camera interactions - Mechanics catalog sourceIds: - source-c121374ae20b1406 - source-c571f972753e630a - source-186323c99307fc90 sources: - id: source-c121374ae20b1406 title: 'Apple AVFoundation: Camera Capture and Control' url: 'https://developer.apple.com/documentation/avfoundation/capture-setup' verifiedAt: null - id: source-c571f972753e630a title: MediaPipe Object Detector url: >- https://developers.google.com/edge/mediapipe/solutions/vision/object_detector verifiedAt: null - id: source-186323c99307fc90 title: Active Arcade url: 'https://apps.apple.com/us/app/active-arcade/id1553158383?uo=4' verifiedAt: null relations: [] placements: - catalogId: phone-camera id: family-motion-2d title: Phone camera interactions url: 'https://gamemechanics.pro/en/mechanics/phone-camera/#family-motion-2d' categoryIds: - section-1 supersededBy: [] attributes: preview: updatedAt: '2026-10-22' title: Motion in the image plane description: >- Frames become movement directions and paths. Active Arcade reads player motion through the camera; the phone needs a stable position and a clear body view. image: src: images/mechanics/input-active-arcade-1.webp width: 720 height: 405 crop: x: 225 'y': 60 width: 495 height: 285 game: Active Arcade sourceUrl: 'https://apps.apple.com/us/app/active-arcade/id1553158383?uo=4' originalUrl: >- https://is1-ssl.mzstatic.com/image/thumb/PurpleSource115/v4/a6/f6/47/a6f64733-077d-715b-80b4-dfef3fecf396/8e690756-92fb-4664-952a-0adc89822d2d_body-motion-gameplay-.jpg/720x1560bb.jpg credit: Nex rights: >- Imagery © Nex. Developer-distributed screenshot or frame; all rights reserved. Excluded from MIT and CC BY 4.0. caption: 'Active Arcade: a person’s movement participates in gameplay' alt: 'Active Arcade: a person’s movement participates in gameplay' markers: - x: 65 'y': 43 label: The camera sees the player while the game adds scores and effects tips: - >- Separate player motion from camera shake and show the usable tracking area. examples: - title: Active Arcade url: 'https://apps.apple.com/us/app/active-arcade/id1553158383?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-camera --- # Motion in the image plane id: phone-camera--family-motion-2d type: mechanic key: mechanic/phone-camera--family-motion-2d lang: en status: active url: https://gamemechanics.pro/en/knowledge/mechanic/phone-camera--family-motion-2d/ Frames become movement directions and paths. Active Arcade reads player motion through the camera; the phone needs a stable position and a clear body view. ## At a glance ![Active Arcade: a person’s movement participates in gameplay](https://gamemechanics.pro/images/mechanics/input-active-arcade-1.webp) [Active Arcade](https://apps.apple.com/us/app/active-arcade/id1553158383?uo=4) · Imagery © Nex. Developer-distributed screenshot or frame; all rights reserved. Excluded from MIT and CC BY 4.0. 1. The camera sees the player while the game adds scores and effects - Separate player motion from camera shake and show the usable tracking area. - [Active Arcade](https://apps.apple.com/us/app/active-arcade/id1553158383?uo=4) ## How it works The flow of frames turns into directions, speeds and trajectories. Without additional cues, camera movement and object movement are easy to confuse. Need a fixed phone, markers or motion compensation. ## Variants ### Variants and applications - Entrance to the area. Action: Bring a hand or object into the marked area to press a virtual button. Application: Non-contact interface, children's game, reaction. Technologies: Image analysis. - Crossing the line. Action: Move an object through the virtual boundary in the desired direction. Application: Goal, pass counter, conveyor sorting. Technologies: Image analysis. - Movement speed. Action: Move the target faster or slower, changing the force of the action. Application: Impact, character acceleration, visual musical instrument. Technologies: Image analysis. - Flow direction. Action: Move the scene or controller left, right, up or down. Application: Steering, swiping, touchless navigation. Technologies: Image analysis. - Trajectory as a symbol. Action: Draw a circle, zigzag or other shape with the target's movement. Application: Runes, gesture passwords, flight drawing. Technologies: Image analysis. - Fading. Action: Keep the image or selected object still. Application: “Freeze”, sight stabilization, virtual neutralization. Technologies: Image analysis. - Repeat route. Action: Draw the tracked point along the pattern with an acceptable deviation. Application: Coordination training, labyrinth, copying a picture. Technologies: Image analysis. - Area of ​​change. Action: Move so as to fill the required portion of the frame with changes. Application: Acceleration of the elements, collective activity, abstract dance. Technologies: Image analysis. ## Context and limits Games, learning, creativity and interactive applications. Author's systematization of game rules based on proven technical capabilities. Examples are application ideas and not statements of released products. ## Connected materials ## Sources and 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. - [Apple AVFoundation: Camera Capture and Control](https://developer.apple.com/documentation/avfoundation/capture-setup) (id: source-c121374ae20b1406) - [MediaPipe Object Detector](https://developers.google.com/edge/mediapipe/solutions/vision/object_detector) (id: source-c571f972753e630a) - [Active Arcade](https://apps.apple.com/us/app/active-arcade/id1553158383?uo=4) (id: source-186323c99307fc90) CC-BY-4.0 · gamemechanics.pro contributors