Custom Physics Body Component

By adding a PhysicsBodyAuthoring component to a GameObject in the Editor, you can control how it is simulated at run time.

A PhysicsBodyAuthoring component has different MotionTypes:

• Static body: The physics solver doesn't move the rigid body. Unity treats any transforms applied to the body as though it is teleporting.
• Kinematic body: The physics solver moves the rigid body according to its velocity, but treats it as though it has infinite mass. It generates a collision response with any rigid bodies that lie in its path of motion, but is not affected by them.
• Dynamic body: The physics solver moves the rigid body and handles its collision response with other bodies, based on its physical properties.

The PhysicsBody component has the following properties:

Field	Description
MotionType	Specifies whether the body should be fully physically simulated (dynamic), moved directly (kinematic), or fixed in place (static)
Smoothing	Specifies how this body's motion in its graphics representation should be smoothed when the rendering framerate is greater than the fixed step rate used by physics
Mass	The mass of the body (default is 1.0f)
Linear Damping	This is applied to a body's linear velocity reducing it over time (default is 0.01f)
Angular Damping	This is applied to a body's angular velocity, reducing it over time (default is 0.01f)
Initial Linear Damping	The initial linear velocity of the body in world space (default is {0.0f, 0.0f, 0.0f})
Initial Angular Damping	This represents the initial rotation speed around each axis in the local motion space of the body i.e. around the center of mass default is {0.0f, 0.0f, 0.0f}
Gravity Factor	Scales the amount of gravity to apply to this body, where 1.0f is the default value for -9.8m/s^2
Advanced
World Index	The index of the physics world this body belongs to. Default physics world has index 0
Override Default Mass Distribution	Default mass distribution is based on the shapes associated with this body (default is false)
Custom Tags	Specify a custom tag for your body (default is nothing)
Detailed Static Mesh Collision	Processes contact detection for dynamic objects colliding with static colliders across both the current and next frame. This helps predict and refine collision accuracy.