Note: This documentation is about writing C# scripts using the LowLevelPhysics2D API. To use 2D physics in the Unity Editor using components like the Rigidbody 2D component, refer to 2D physics instead.
Explore the properties and settings you can use to configure the defaults and global behaviour of the LowLevelPhysics2D API. For more information, refer to Configure global 2D physics settings.
The properties in this section configure the layers Unity uses to detect collisionA collision occurs when the physics engine detects that the colliders of two GameObjects make contact or overlap, when at least one has a Rigidbody component and is in motion. More info
See in Glossary. For more information, refer to Configure collisions between LowLevelPhysics2D API objects.
| Property | Description |
|---|---|
| Physics Layer Names | Sets the names of the 64 layers the PhysicsMask API uses if you enable Use Full Layers. By default, the first layer has the name Default and the other layers have no name. |
| Use Full Layers | Enables the PhysicsMask API using the 64 layers listed under Physics Layer Names. If you disable this property, the PhysicsMask API uses the 32 GameObject layers instead. |
The properties in this section set the default values when you create a new definition object. For the individual sections, refer to the following:
| Property | Description |
|---|---|
| Concurrent Simulations | Sets the number of physics simulations that can run at the same time. The default is 2. |
| Length Units Per Meter | Sets the number of Unity unitsThe unit size used in Unity projects. By default, 1 Unity unit is 1 meter. To use a different scale, set the Scale Factor in the Import Settings when importing assets. See in Glossary that correspond to one meter in the physics simulation. The default is 1. |
| Draw In Build | Draws the debug visualization in a built application. For more information, refer to Draw a debug visualization of objects. |
| Bypass Low Level | Disables the LowLevelPhysics2D API physics system. |