---
key: mechanic/phone-touch--family-10
type: mechanic
id: phone-touch--family-10
lang: en
title: Multi-touch coordination
summary: >-
  Contacts independently control parts of an object. Touchgrind Skate 2 uses two
  fingers on a virtual board much like a physical fingerboard.
updatedAt: '2026-10-22'
status: active
url: 'https://gamemechanics.pro/en/knowledge/mechanic/phone-touch--family-10/'
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/phone-touch--family-10.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/phone-touch--family-10.md
aliases: []
tags:
  - Phone touchscreen interactions
  - Mechanics catalog
sourceIds:
  - source-c8a8e21794e0a516
sources:
  - id: source-c8a8e21794e0a516
    title: Touchgrind Skate 2
    url: 'https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?uo=4'
    verifiedAt: null
relations: []
placements:
  - catalogId: phone-touch
    id: family-10
    title: Phone touchscreen interactions
    url: 'https://gamemechanics.pro/en/mechanics/phone-touch/#family-10'
    categoryIds:
      - section-1
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Multi-touch coordination
    description: >-
      Contacts independently control parts of an object. Touchgrind Skate 2 uses
      two fingers on a virtual board much like a physical fingerboard.
    image:
      src: images/mechanics/input-touchgrind-0.webp
      width: 720
      height: 1280
      crop:
        x: 0
        'y': 650
        width: 720
        height: 630
      game: Touchgrind Skate 2
      sourceUrl: 'https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?uo=4'
      originalUrl: >-
        https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/fa/db/b8/fadbb833-4bbf-b66d-0221-f0219b8f4ff5/mzl.ozfeehxb.jpg/720x1560bb.jpg
      credit: Illusion Labs
      rights: >-
        Imagery © Illusion Labs. Developer-distributed screenshot or frame; all
        rights reserved. Excluded from MIT and CC BY 4.0.
      caption: 'Touchgrind Skate 2: two fingers control one board'
      alt: 'Touchgrind Skate 2: two fingers control one board'
      markers:
        - x: 51
          'y': 73
          label: Different finger positions participate in board control
    tips:
      - Retain contact identifiers so finger roles cannot swap.
    examples:
      - title: Touchgrind Skate 2
        url: 'https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?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-touch
---
# Multi-touch coordination

id: phone-touch--family-10
type: mechanic
key: mechanic/phone-touch--family-10
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/phone-touch--family-10/

Contacts independently control parts of an object. Touchgrind Skate 2 uses two fingers on a virtual board much like a physical fingerboard.

## At a glance

![Touchgrind Skate 2: two fingers control one board](https://gamemechanics.pro/images/mechanics/input-touchgrind-0.webp)

[Touchgrind Skate 2](https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?uo=4) · Imagery © Illusion Labs. Developer-distributed screenshot or frame; all rights reserved. Excluded from MIT and CC BY 4.0.

1. Different finger positions participate in board control

- Retain contact identifiers so finger roles cannot swap.

- [Touchgrind Skate 2](https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?uo=4)

## How it works

Multiple contacts are given independent roles or must perform a coordinated action.

## Variants

### Variants and applications

<a id="family-10-variants"></a>

- Independent objects. Type: multi. Fingers: 2+. Rule: Each active contact controls its own object. Application: Two characters, multiple traps, independent musical voices. <a id="variant-t073"></a>
- Movement and aiming. Type: multi. Fingers: 2+. Rule: Different input zones control movement and direction of action. Application: Two virtual sticks, movement plus vision or shooting. <a id="variant-t074"></a>
- Retention and separate team. Type: multi. Fingers: 2+. Rule: One finger supports the action, the other selects or activates the target. Application: Hold the shield and attack, hold the enemy and use the tool. <a id="variant-t075"></a>
- Modifier finger. Type: multi. Fingers: 2+. Rule: Contact in a special zone changes the meaning of the movement of the other finger. Application: Fine tuning, alternative tool, slow motion. <a id="variant-t076"></a>
- The section between the fingers. Type: multi. Fingers: 2+. Rule: Two contacts define a line that interacts with the world. Application: Membrane shield, laser barrier, trap, stretchable platform. <a id="variant-t077"></a>
- Polygon of contacts. Type: multi. Fingers: 2+. Rule: Three or more points define the area of ​​influence. Application: Capture creatures, hold a contour, cover several objects. Check contact limit and convenience. <a id="variant-t078"></a>
- Number of contacts. Type: multi. Fingers: 2+. Rule: The mode or command depends on the number of simultaneously active touches. Application: Choose the size of the instrument, the number of voices, the power of the ritual. The application does not recognize the identity of the finger. <a id="variant-t079"></a>
- Transferring a contact. Type: multi. Fingers: 2+. Rule: A new finger must enter before the previous one comes off, maintaining the general condition. Application: Carry energy along a chain, maintain a continuous bridge or cooperative grip. <a id="variant-t080"></a>

## Context and limits

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.

## 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.

- [Touchgrind Skate 2](https://apps.apple.com/us/app/touchgrind-skate-2/id720068876?uo=4) (id: source-c8a8e21794e0a516)

CC-BY-4.0 · gamemechanics.pro contributors