# PhysicsCoreSettings2D > PhysicsCore Settings Asset. This contains all the global physics options along with the default values for the following definitions: PhysicsWorldDefinition PhysicsBodyDefinition PhysicsShapeDefinition PhysicsChainDefinition PhysicsDistanceJointDefinition PhysicsFixedJointDefinition PhysicsHingeJointDefinition PhysicsRelativeJointDefinition PhysicsSliderJointDefinition PhysicsWheelJointDefinition ## Definition * **Type:** Class * **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md) * **Assembly:** UnityEngine.PhysicsCore2DModule * **Inherits from:** [ScriptableObject](/engine/6000.5/script-reference/unityengine/scriptableobject.md) ```csharp public sealed class PhysicsCoreSettings2D : ScriptableObject ``` ## Properties | Property | Description | | ------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [alwaysDrawWorlds](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/alwaysdrawworlds.md) | Controls if worlds are always drawn independent of whether rendering is currently active or not as specified by \_renderingMode. When true, world drawing is always active and a [PhysicsEvents.WorldDrawResults](/engine/6000.5/script-reference/unity/u2d/physics/physicsevents/worlddrawresults.md) event is produced containing the [PhysicsWorld.DrawResults](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/drawresults.md). When false, world drawing only occurs depending on the \_renderingMode setting. | | [concurrentSimulations](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/concurrentsimulations.md) | Controls how many simulations can be started in parallel. Each one is started on its own worker and acts as its own main-thread. Workers should ideally be left free for the solver otherwise it may degrade solving performance. The actual quantity of workers used will always be capped to those available on the current device. | | [contactFilterGroupMode](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/contactfiltergroupmode.md) | The mode used for the [PhysicsShape.ContactFilter](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/contactfilter.md) when determining if two [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) can contact. See [PhysicsShape.ContactFilterGroupMode](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/contactfiltergroupmode.md). | | [contactFilterMode](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/contactfiltermode.md) | The mode used for the [PhysicsShape.ContactFilter](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/contactfilter.md) when determining if two [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) can contact. See [PhysicsShape.ContactFilterMode](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/contactfiltermode.md). | | [disableSimulation](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/disablesimulation.md) | Controls the simulation of any [PhysicsWorld](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld.md) temporarily removing simulation overhead. When true, no automatic simulation will occur. When false, normal operation occurs with automatic simulation. | | [lengthUnitsPerMeter](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/lengthunitspermeter.md) | The internal length units per meter. | | [maximumWorlds](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/maximumworlds.md) | Get/Set the maximum number of worlds that can be created. The larger the number of worlds, the more memory that is initially allocated so care must be taken. Setting this value to one will reduce start-up memory usage to a minimum but will not allow any additional worlds to be created. The maximum value must be in the range of 1 to 1024. Any change will only be handled by Exiting Play mode in the Editor or restarting the player build. | | [physicsBodyDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsbodydefinition.md) | Get/Set the [PhysicsBodyDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsbodydefinition.md). | | [physicsChainDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicschaindefinition.md) | Get/Set the [PhysicsChainDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicschaindefinition.md). | | [physicsDistanceJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsdistancejointdefinition.md) | Get/Set the [PhysicsDistanceJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsdistancejointdefinition.md). | | [physicsFixedJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsfixedjointdefinition.md) | Get/Set the [PhysicsFixedJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsfixedjointdefinition.md). | | [physicsHingeJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicshingejointdefinition.md) | Get/Set the [PhysicsHingeJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicshingejointdefinition.md). | | [physicsLayerNames](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicslayernames.md) | A set of 64 "layer" names associated with each bit in a [PhysicsMask](/engine/6000.5/script-reference/unity/u2d/physics/physicsmask.md) when used for contacts and queries. | | [physicsRelativeJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsrelativejointdefinition.md) | Get/Set the [PhysicsRelativeJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsrelativejointdefinition.md). | | [physicsShapeDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsshapedefinition.md) | Get/Set the [PhysicsShapeDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsshapedefinition.md). | | [physicsSliderJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicssliderjointdefinition.md) | Get/Set the [PhysicsSliderJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicssliderjointdefinition.md). | | [physicsWheelJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicswheeljointdefinition.md) | Get/Set the [PhysicsWheelJointDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicswheeljointdefinition.md). | | [physicsWorldDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicsworlddefinition.md) | Get/Set the [PhysicsWorldDefinition](/engine/6000.5/script-reference/unity/u2d/physics/physicsworlddefinition.md). | | [renderingMode](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/renderingmode.md) | Controls drawing and rendering is allowed. | | [transformChangeMode](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/transformchangemode.md) | Defines when changes to [Transform](/engine/6000.5/script-reference/unityengine/transform.md) that has are registered with [PhysicsWorld.RegisterTransformChange](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/registertransformchange.md) are called. NOTE: In the Unity Editor when not in Play Mode, Transform change callbacks are always and only sent at the start of the frame for authoring purposes. See [PhysicsWorld.TransformChangeMode](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/transformchangemode.md). | | [usePhysicsLayers](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/usephysicslayers.md) | Controls if the physics 64-bit layers are used based upon [\_physicsLayerNames](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicslayernames.md) or if not, the standard 32-bit layers based upon [LayerMask](/engine/6000.5/script-reference/unityengine/layermask.md). If a [PhysicsCoreSettings2D](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d.md) asset is assigned then the physics layers ([\_physicsLayerNames](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/physicslayernames.md)) will be used if [\_usePhysicsLayers](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d/usephysicslayers.md) is also active. If no [PhysicsCoreSettings2D](/engine/6000.5/script-reference/unity/u2d/physics/physicscoresettings2d.md) asset is assigned then the global layers (See [LayerMask](/engine/6000.5/script-reference/unityengine/layermask.md)) will be used. | ## Inheritance **Inherited Members:** * [ScriptableObject.CreateInstance(string)](/engine/6000.5/script-reference/unityengine/scriptableobject/createinstance.md#createinstance\(string\)) * [ScriptableObject.CreateInstance(Type)](/engine/6000.5/script-reference/unityengine/scriptableobject/createinstance.md#createinstance\(type\)) * [ScriptableObject.CreateInstance\()](/engine/6000.5/script-reference/unityengine/scriptableobject/createinstance.md) * [Object.GetEntityId()](/engine/6000.5/script-reference/unityengine/object/getentityid.md) * [Object.GetHashCode()](/engine/6000.5/script-reference/unityengine/object/gethashcode.md) * [Object.InstantiateAsync\(T)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Transform, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, ReadOnlySpan\, ReadOnlySpan\)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, Vector3, Quaternion, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, ReadOnlySpan\, ReadOnlySpan\)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Transform, ReadOnlySpan\, ReadOnlySpan\, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, InstantiateParameters, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, InstantiateParameters, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, Vector3, Quaternion, InstantiateParameters, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, Vector3, Quaternion, InstantiateParameters, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.InstantiateAsync\(T, int, ReadOnlySpan\, ReadOnlySpan\, InstantiateParameters, CancellationToken)](/engine/6000.5/script-reference/unityengine/object/instantiateasync.md) * [Object.Instantiate(Object, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object-vector3-quaternion\)) * [Object.Instantiate(Object, Vector3, Quaternion, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object-vector3-quaternion-transform\)) * [Object.Instantiate(Object)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object\)) * [Object.Instantiate(Object, Scene)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object-scene\)) * [Object.Instantiate\(T, InstantiateParameters)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion, InstantiateParameters)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate(Object, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object-transform\)) * [Object.Instantiate(Object, Transform, bool)](/engine/6000.5/script-reference/unityengine/object/instantiate.md#instantiate\(object-transform-bool\)) * [Object.Instantiate\(T)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Vector3, Quaternion, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Transform)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Instantiate\(T, Transform, bool)](/engine/6000.5/script-reference/unityengine/object/instantiate.md) * [Object.Destroy(Object, float)](/engine/6000.5/script-reference/unityengine/object/destroy.md) * [Object.DestroyImmediate(Object, bool)](/engine/6000.5/script-reference/unityengine/object/destroyimmediate.md) * [Object.FindObjectsByType(Type)](/engine/6000.5/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytype\(type\)) * [Object.FindObjectsByType(Type, FindObjectsInactive)](/engine/6000.5/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytype\(type-findobjectsinactive\)) * [Object.DontDestroyOnLoad(Object)](/engine/6000.5/script-reference/unityengine/object/dontdestroyonload.md) * [Object.FindAnyObjectByType\()](/engine/6000.5/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytypet\(\)) * [Object.FindAnyObjectByType\(FindObjectsInactive)](/engine/6000.5/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytypet\(findobjectsinactive\)) * [Object.FindObjectsByType\()](/engine/6000.5/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytypet\(\)) * [Object.FindObjectsByType\(FindObjectsInactive)](/engine/6000.5/script-reference/unityengine/object/findobjectsbytype.md#findobjectsbytypet\(findobjectsinactive\)) * [Object.FindAnyObjectByType(Type)](/engine/6000.5/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytype\(type\)) * [Object.FindAnyObjectByType(Type, FindObjectsInactive)](/engine/6000.5/script-reference/unityengine/object/findanyobjectbytype.md#findanyobjectbytype\(type-findobjectsinactive\)) * [Object.ToString()](/engine/6000.5/script-reference/unityengine/object/tostring.md) * [Object.name](/engine/6000.5/script-reference/unityengine/object/name.md) * [Object.hideFlags](/engine/6000.5/script-reference/unityengine/object/hideflags.md) ### Operators | Operator | Description | | ---------------------------------------------------------------------------------- | ----------------------------------------------------------------------- | | [operator ==](/engine/6000.5/script-reference/unityengine/object/op-equality.md) | Compares two object references to see if they refer to the same object. | | [bool](/engine/6000.5/script-reference/unityengine/object/op-implicit.md) | Determines whether the object exists. | | [operator !=](/engine/6000.5/script-reference/unityengine/object/op-inequality.md) | Compares if two objects refer to a different object. |