# Physics2D > Global settings and helpers for 2D physics. ## Definition * **Type:** Class * **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md) * **Assembly:** UnityEngine.Physics2DModule ```csharp public class Physics2D ``` ## Static Fields | Value | Description | | ----------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [AllLayers](/engine/6000.0/script-reference/unityengine/physics2d/alllayers.md) | Layer mask constant that includes all layers. | | [DefaultRaycastLayers](/engine/6000.0/script-reference/unityengine/physics2d/defaultraycastlayers.md) | Layer mask constant that includes all layers participating in raycasts by default. | | [IgnoreRaycastLayer](/engine/6000.0/script-reference/unityengine/physics2d/ignoreraycastlayer.md) | Layer mask constant for the default layer that ignores raycasts. | | [MaxPolygonShapeVertices](/engine/6000.0/script-reference/unityengine/physics2d/maxpolygonshapevertices.md) | The maximum number of vertices allowed per primitive polygon shape type ([PhysicsShapeType2D.Polygon](/engine/6000.0/script-reference/unityengine/physicsshapetype2d/polygon.md)). (Read Only) | ## Static Properties | Property | Description | | ----------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [angularSleepTolerance](/engine/6000.0/script-reference/unityengine/physics2d/angularsleeptolerance.md) | A Rigidbody cannot sleep if its angular velocity is above this tolerance threshold. | | [autoSyncTransforms](/engine/6000.0/script-reference/unityengine/physics2d/autosynctransforms.md) | Set whether to automatically sync changes to the [Transform](/engine/6000.0/script-reference/unityengine/transform.md) component with the physics engine. | | [baumgarteScale](/engine/6000.0/script-reference/unityengine/physics2d/baumgartescale.md) | The scale factor that controls how fast overlaps are resolved. | | [baumgarteTOIScale](/engine/6000.0/script-reference/unityengine/physics2d/baumgartetoiscale.md) | The scale factor that controls how fast TOI overlaps are resolved. | | [bounceThreshold](/engine/6000.0/script-reference/unityengine/physics2d/bouncethreshold.md) | Any collisions with a relative linear velocity below this threshold will be treated as inelastic so no bounce will occur. | | [callbacksOnDisable](/engine/6000.0/script-reference/unityengine/physics2d/callbacksondisable.md) | Use this to control whether or not the appropriate OnCollisionExit2D or OnTriggerExit2D callbacks should be called when a [Collider2D](/engine/6000.0/script-reference/unityengine/collider2d.md) is disabled. | | [contactThreshold](/engine/6000.0/script-reference/unityengine/physics2d/contactthreshold.md) | A threshold below which a contact is automatically disabled. | | [defaultContactOffset](/engine/6000.0/script-reference/unityengine/physics2d/defaultcontactoffset.md) | The default contact offset of the newly created Colliders. | | [defaultPhysicsScene](/engine/6000.0/script-reference/unityengine/physics2d/defaultphysicsscene.md) | The [PhysicsScene2D](/engine/6000.0/script-reference/unityengine/physicsscene2d.md) automatically created when Unity starts. | | [gravity](/engine/6000.0/script-reference/unityengine/physics2d/gravity.md) | Acceleration due to gravity. | | [jobOptions](/engine/6000.0/script-reference/unityengine/physics2d/joboptions.md) | A set of options that control how physics operates when using the job system to multithread the physics simulation. | | [linearSleepTolerance](/engine/6000.0/script-reference/unityengine/physics2d/linearsleeptolerance.md) | A rigid-body cannot sleep if its linear velocity is above this tolerance. | | [maxAngularCorrection](/engine/6000.0/script-reference/unityengine/physics2d/maxangularcorrection.md) | The maximum angular position correction used when solving constraints. This helps to prevent overshoot. | | [maxLinearCorrection](/engine/6000.0/script-reference/unityengine/physics2d/maxlinearcorrection.md) | The maximum linear position correction used when solving constraints. This helps to prevent overshoot. | | [maxRotationSpeed](/engine/6000.0/script-reference/unityengine/physics2d/maxrotationspeed.md) | The maximum angular speed of a rigid-body per physics update. Increasing this can cause numerical problems. | | [maxSubStepCount](/engine/6000.0/script-reference/unityengine/physics2d/maxsubstepcount.md) | The maximum number of simulation sub-steps allowed per-frame when simulation sub-stepping is enabled. | | [maxTranslationSpeed](/engine/6000.0/script-reference/unityengine/physics2d/maxtranslationspeed.md) | The maximum linear speed of a rigid-body per physics update. Increasing this can cause numerical problems. | | [minSubStepFPS](/engine/6000.0/script-reference/unityengine/physics2d/minsubstepfps.md) | The minimum FPS allowed for a simulation step before sub-stepping will be used. | | [positionIterations](/engine/6000.0/script-reference/unityengine/physics2d/positioniterations.md) | The number of iterations of the physics solver when considering objects' positions. | | [queriesHitTriggers](/engine/6000.0/script-reference/unityengine/physics2d/querieshittriggers.md) | Do raycasts detect Colliders configured as triggers? | | [queriesStartInColliders](/engine/6000.0/script-reference/unityengine/physics2d/queriesstartincolliders.md) | Set the raycasts or linecasts that start inside Colliders to detect or not detect those Colliders. | | [reuseCollisionCallbacks](/engine/6000.0/script-reference/unityengine/physics2d/reusecollisioncallbacks.md) | Determines whether the garbage collector should reuse only a single instance of a Collision2D type for all collision callbacks. | | [simulationLayers](/engine/6000.0/script-reference/unityengine/physics2d/simulationlayers.md) | The [Rigidbody2D](/engine/6000.0/script-reference/unityengine/rigidbody2d.md) and [Collider2D](/engine/6000.0/script-reference/unityengine/collider2d.md) layers to simulate. | | [simulationMode](/engine/6000.0/script-reference/unityengine/physics2d/simulationmode.md) | Controls when Unity executes the 2D physics simulation. | | [timeToSleep](/engine/6000.0/script-reference/unityengine/physics2d/timetosleep.md) | The time in seconds that a rigid-body must be still before it will go to sleep. | | [useSubStepContacts](/engine/6000.0/script-reference/unityengine/physics2d/usesubstepcontacts.md) | Whether to calculate contacts for all simulation sub-steps or only the first sub-step. | | [useSubStepping](/engine/6000.0/script-reference/unityengine/physics2d/usesubstepping.md) | Whether to use simulation sub-stepping during a simulation step. | | [velocityIterations](/engine/6000.0/script-reference/unityengine/physics2d/velocityiterations.md) | The number of iterations of the physics solver when considering objects' velocities. | ## Static Methods | Method | Description | | ----------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------- | | [BoxCast](/engine/6000.0/script-reference/unityengine/physics2d/boxcast.md) | Casts a box against Colliders in the Scene, returning the first Collider to contact with it. | | [BoxCastAll](/engine/6000.0/script-reference/unityengine/physics2d/boxcastall.md) | Casts a box against Colliders in the Scene, returning all Colliders that contact with it. | | [CapsuleCast](/engine/6000.0/script-reference/unityengine/physics2d/capsulecast.md) | Casts a capsule against Colliders in the Scene, returning the first Collider to contact with it. | | [CapsuleCastAll](/engine/6000.0/script-reference/unityengine/physics2d/capsulecastall.md) | Casts a capsule against Colliders in the Scene, returning all Colliders that contact with it. | | [CircleCast](/engine/6000.0/script-reference/unityengine/physics2d/circlecast.md) | Casts a circle against Colliders in the Scene, returning the first Collider to contact with it. | | [CircleCastAll](/engine/6000.0/script-reference/unityengine/physics2d/circlecastall.md) | Casts a circle against Colliders in the Scene, returning all Colliders that contact with it. | | [ClosestPoint](/engine/6000.0/script-reference/unityengine/physics2d/closestpoint.md) | Returns a point on the perimeter of the Collider that is closest to the specified position. | | [Distance](/engine/6000.0/script-reference/unityengine/physics2d/distance.md) | Calculates the minimum distance between two Colliders. | | [GetContacts](/engine/6000.0/script-reference/unityengine/physics2d/getcontacts.md) | Retrieves all Colliders in contact with the Collider. | | [GetIgnoreCollision](/engine/6000.0/script-reference/unityengine/physics2d/getignorecollision.md) | Checks whether the collision detection system will ignore all collisions/triggers between collider1 and collider2 or not. | | [GetIgnoreLayerCollision](/engine/6000.0/script-reference/unityengine/physics2d/getignorelayercollision.md) | Checks whether collisions between the specified layers be ignored or not. | | [GetLayerCollisionMask](/engine/6000.0/script-reference/unityengine/physics2d/getlayercollisionmask.md) | Get the collision layer mask that indicates which layer(s) the specified layer can collide with. | | [GetRayIntersection](/engine/6000.0/script-reference/unityengine/physics2d/getrayintersection.md) | Cast a 3D ray against the 2D Colliders in the Scene. | | [GetRayIntersectionAll](/engine/6000.0/script-reference/unityengine/physics2d/getrayintersectionall.md) | Cast a 3D ray against the 2D Colliders in the Scene. | | [IgnoreCollision](/engine/6000.0/script-reference/unityengine/physics2d/ignorecollision.md) | Makes the collision detection system ignore all collisions/triggers between collider1 and collider2. | | [IgnoreLayerCollision](/engine/6000.0/script-reference/unityengine/physics2d/ignorelayercollision.md) | Choose whether to detect or ignore collisions between a specified pair of layers. | | [IsTouching](/engine/6000.0/script-reference/unityengine/physics2d/istouching.md) | Checks whether the passed Colliders are in contact or not. | | [IsTouchingLayers](/engine/6000.0/script-reference/unityengine/physics2d/istouchinglayers.md) | Checks whether the Collider is touching any Colliders on the specified layerMask or not. | | [Linecast](/engine/6000.0/script-reference/unityengine/physics2d/linecast.md) | Casts a line segment against Colliders in the Scene. | | [LinecastAll](/engine/6000.0/script-reference/unityengine/physics2d/linecastall.md) | Casts a line against Colliders in the Scene. | | [OverlapArea](/engine/6000.0/script-reference/unityengine/physics2d/overlaparea.md) | Checks if a Collider falls within a rectangular area. | | [OverlapAreaAll](/engine/6000.0/script-reference/unityengine/physics2d/overlapareaall.md) | Get a list of all Colliders that fall within a rectangular area. | | [OverlapBox](/engine/6000.0/script-reference/unityengine/physics2d/overlapbox.md) | Checks if a Collider falls within a box area. | | [OverlapBoxAll](/engine/6000.0/script-reference/unityengine/physics2d/overlapboxall.md) | Get a list of all Colliders that fall within a box area. | | [OverlapCapsule](/engine/6000.0/script-reference/unityengine/physics2d/overlapcapsule.md) | Checks if a Collider falls within a capsule area. | | [OverlapCapsuleAll](/engine/6000.0/script-reference/unityengine/physics2d/overlapcapsuleall.md) | Get a list of all Colliders that fall within a capsule area. | | [OverlapCircle](/engine/6000.0/script-reference/unityengine/physics2d/overlapcircle.md) | Checks if a Collider falls within a circular area. | | [OverlapCircleAll](/engine/6000.0/script-reference/unityengine/physics2d/overlapcircleall.md) | Get a list of all Colliders that fall within a circular area. | | [OverlapCollider](/engine/6000.0/script-reference/unityengine/physics2d/overlapcollider.md) | Gets a list of all Colliders that overlap the given Collider. | | [OverlapPoint](/engine/6000.0/script-reference/unityengine/physics2d/overlappoint.md) | Checks if a Collider overlaps a point in space. | | [OverlapPointAll](/engine/6000.0/script-reference/unityengine/physics2d/overlappointall.md) | Get a list of all Colliders that overlap a point in space. | | [Raycast](/engine/6000.0/script-reference/unityengine/physics2d/raycast.md) | Casts a ray against Colliders in the Scene. | | [RaycastAll](/engine/6000.0/script-reference/unityengine/physics2d/raycastall.md) | Casts a ray against Colliders in the Scene, returning all Colliders that contact with it. | | [SetLayerCollisionMask](/engine/6000.0/script-reference/unityengine/physics2d/setlayercollisionmask.md) | Set the collision layer mask that indicates which layer(s) the specified layer can collide with. | | [Simulate](/engine/6000.0/script-reference/unityengine/physics2d/simulate.md) | Simulate physics in the default physics scene. | | [SyncTransforms](/engine/6000.0/script-reference/unityengine/physics2d/synctransforms.md) | Synchronizes. |