/// rcp authored schema

PhysicsMotionComponent

Exact USDA block introduced by RCP plus fixture-backed contract evidence.

ID: RealityKit.MotionState Baseline: BASE.usda Fixture: Physics Motion

schema.json fields.csv matrix.csv fixtures.csv

Quick Read

PhysicsMotionComponent has 4 fields. None are written in the baseline — RCP uses sparse authoring, emitting each field only when it differs from the engine default.

Authored as def RealityKitComponent "MotionState" with info:id = "RealityKit.MotionState".

For large components, prefer fixtures.csv for fixture-by-fixture authored rows and matrix.csv for the derived variant matrix.

Introduced USD Block

USDA

def RealityKitComponent "MotionState"
{
    uniform token info:id = "RealityKit.MotionState"
}

Sparse Patch Examples

Each fixture shows the USDA block RCP writes when a single parameter is changed in the inspector.

Angular Velocity.usda

Changes: m_userSetAngularVelocity, m_userSetAngularVelocityVersion

Changed fields: m_userSetAngularVelocity, m_userSetAngularVelocityVersion

USDA

def RealityKitComponent "MotionState"
{
    uniform token info:id = "RealityKit.MotionState"
    float3 m_userSetAngularVelocity = (1, 1, 1)
    uint m_userSetAngularVelocityVersion = 1
}

Linear Velocity.usda

Changes: m_userSetLinearVelocity, m_userSetLinearVelocityVersion

Changed fields: m_userSetLinearVelocity, m_userSetLinearVelocityVersion

USDA

def RealityKitComponent "MotionState"
{
    uniform token info:id = "RealityKit.MotionState"
    float3 m_userSetLinearVelocity = (1, 1, 1)
    uint m_userSetLinearVelocityVersion = 1
}

ALL.usda

Changes: m_userSetAngularVelocity, m_userSetAngularVelocityVersion, m_userSetLinearVelocity + 1 more

Changed fields: m_userSetAngularVelocity, m_userSetAngularVelocityVersion, m_userSetLinearVelocity, m_userSetLinearVelocityVersion

USDA

def RealityKitComponent "MotionState"
{
    uniform token info:id = "RealityKit.MotionState"
    float3 m_userSetAngularVelocity = (1, 1, 1)
    uint m_userSetAngularVelocityVersion = 1
    float3 m_userSetLinearVelocity = (1, 1, 1)
    uint m_userSetLinearVelocityVersion = 1
}

Fields

m_userSetAngularVelocity float3

Baseline: not written — sparse only
Written as: (1, 1, 1)

m_userSetAngularVelocityVersion uint

Baseline: not written — sparse only
Written as: 1

m_userSetLinearVelocity float3

Baseline: not written — sparse only
Written as: (1, 1, 1)

m_userSetLinearVelocityVersion uint

Baseline: not written — sparse only
Written as: 1

Observed Authoring Matrix

4 fixtures × 4 fields

Variant	`m_userSetAngularVelocity`	`m_userSetAngularVelocityVersion`	`m_userSetLinearVelocity`	`m_userSetLinearVelocityVersion`	Interpretation
ALL.usda	`(1, 1, 1)`	`1`	`(1, 1, 1)`	`1`	Changes: m_userSetAngularVelocity, m_userSetAngularVelocityVersion, m_userSetLinearVelocity + 1 more
Angular Velocity.usda	`(1, 1, 1)`	`1`	`omitted`	`omitted`	Changes: m_userSetAngularVelocity, m_userSetAngularVelocityVersion
BASE.usda	`omitted`	`omitted`	`omitted`	`omitted`	Canonical baseline fixture
Linear Velocity.usda	`omitted`	`omitted`	`(1, 1, 1)`	`1`	Changes: m_userSetLinearVelocity, m_userSetLinearVelocityVersion