# Interface: WorldDef

## Properties

### allowSleep?

> `optional` **allowSleep**: `boolean`

[default: true]

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### blockSolve?

> `optional` **blockSolve**: `boolean`

[default: true]

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### continuousPhysics?

> `optional` **continuousPhysics**: `boolean`

[default: true]

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### gravity?

> `optional` **gravity**: [`Vec2Value`](/api/interfaces/Vec2Value)

[default: { x : 0, y : 0}]

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### subStepping?

> `optional` **subStepping**: `boolean`

[default: false]

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### warmStarting?

> `optional` **warmStarting**: `boolean`

[default: true]