{"schemaVersion":1,"record":{"key":"mechanic/spatial-interfaces--t299","type":"mechanic","id":"spatial-interfaces--t299","lang":"en","title":"VR grabbing, gestures and hand manipulation","summary":"Spatial grabbing links hand pose to a virtual object through contact start, holding and release rules.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/spatial-interfaces--t299/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/spatial-interfaces--t299.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/spatial-interfaces--t299.md","aliases":["VR: grasping and hand manipulation"],"tags":["Spatial and alternative interfaces","Mechanics and variants"],"sourceIds":["source-6ca85c9fb9703865","source-4055bba1b9f6c648","source-909400af9fbfca32"],"sources":[{"id":"source-6ca85c9fb9703865","title":"Khronos: OpenXR","url":"https://www.khronos.org/openxr/","verifiedAt":null},{"id":"source-4055bba1b9f6c648","title":"MDN: WebXR Device API","url":"https://developer.mozilla.org/en-US/docs/Web/API/WebXR_Device_API","verifiedAt":null},{"id":"source-909400af9fbfca32","title":"Keep Talking and Nobody Explodes","url":"https://store.steampowered.com/app/341800/","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"Spatial grabbing links hand pose to a virtual object through contact start, holding and release rules."},{"id":"variants","title":"Variants","body":"### Mechanic variants\n\n<a id=\"t299-variants\"></a>\n\n- Direct grabbing requires close contact. <a id=\"t299-v1\"></a>\n- Distant rays select remote objects. <a id=\"t299-v2\"></a>\n- Two-handed actions derive orientation from two points. <a id=\"t299-v3\"></a>\n- Release transfers an estimated throwing velocity. <a id=\"t299-v4\"></a>"},{"id":"example","title":"Design example","body":"A player holds a housing with one hand and turns an axis-constrained crank with the other.\n\nPrototype check: Test lost hand tracking and controller alternatives so objects do not launch unexpectedly when tracking returns."},{"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":"t299","title":"Spatial and alternative interfaces","url":"https://gamemechanics.pro/en/mechanics/spatial-interfaces/#t299","categoryIds":["mechanics"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"VR: grasping and hand manipulation","description":"Spatial grabbing links hand pose to a virtual object through contact start, holding and release rules.","image":{"src":"images/mechanics/adventure-keep-talking-10.webp","width":1440,"height":810,"game":"Keep Talking and Nobody Explodes","sourceUrl":"https://store.steampowered.com/app/341800/","originalUrl":"https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/341800/ss_abacdee611c0cabeedc8c445ef52bea600417b07.1920x1080.jpg?t=1699020889","credit":"Steel Crate Games","rights":"Game imagery © its respective rights holders. Publisher-distributed Steam screenshot; all rights reserved. Excluded from MIT and CC BY 4.0.","caption":"Virtual hands interact with the device’s modules","alt":"Virtual hands interact with the device’s modules","markers":[{"x":90,"y":48,"label":"Hand interactions in the VR version"},{"x":48,"y":45,"label":"Modules require communication with an expert"}]},"tips":["Define grasp start, holding, release and contact feedback explicitly."],"examples":[{"title":"Keep Talking and Nobody Explodes","url":"https://store.steampowered.com/app/341800/"}]}},"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"}}