TransformWriteMode

Description

The method used to Write the body pose to the Transform. See PhysicsWorld.transformWriteMode.

By default, Unity writes the Transform component after it finishes calculating the physics simulation. Set this mode to Interpolate or Extrapolate instead to interpolate positions between simulation steps. PhysicsBody.transformObject is available only in a C# script, not in the Inspector window of a public PhysicsBodyDefinition object.

 // Move a GameObject by creating a dynamic body and writing its Transform.
 using UnityEngine;
 using Unity.U2D.Physics;

 public class MoveGameObject : MonoBehaviour
 {
     public PhysicsWorld world;
     public PhysicsWorldDefinition worldDefinition = PhysicsWorldDefinition.defaultDefinition;

     void Awake()
     {
         // Enable physics bodies updating transforms.
         worldDefinition.transformWriteMode = PhysicsWorld.TransformWriteMode.Fast2D;
         world = PhysicsWorld.Create(worldDefinition);
     }

     void Start()
     {
         // Create a body and shape.
         PhysicsBody circleBody = world.CreateBody();
         CircleGeometry circleGeometry = new CircleGeometry { radius = 2f };
         circleBody.CreateShape(circleGeometry);

         // Set body to dynamic so it falls under gravity.
         circleBody.type = PhysicsBody.BodyType.Dynamic;

         // Enable this physics body updating transforms.
         circleBody.transformWriteMode = PhysicsBody.TransformWriteMode.Current;

         // Set the updated transform as the transform of this GameObject.
         circleBody.transformObject = transform;
     }
 }

Properties