RigidbodyConstraints
Use these flags to constrain motion of Rigidbodies.
Read time 2 minutesLast updated 7 days ago
Definition
- Type: Enum
- Namespace: UnityEngine
- Assembly: UnityEngine.PhysicsModule
public enum RigidbodyConstraints
Remarks
Additional Resources: Rigidbody.constraints. This enables you to freeze positions and rotations on all axes.
Examples
//This example shows how RigidbodyConstraints is used to freeze the position and rotation of a Rigidbody in the z axis at start-up.//It also shows what happens when these constraints are removed, when you press the space key//Attach this to a GameObject with a Rigidbody to see it in actionusing UnityEngine;public class RigidBodyConstraitsExample : MonoBehaviour{ Rigidbody m_Rigidbody; Vector3 m_ZAxis; void Start() { m_Rigidbody = GetComponent<Rigidbody>(); //This locks the RigidBody so that it does not move or rotate in the z axis (can be seen in Inspector). m_Rigidbody.constraints = RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezeRotationZ; //Set up vector for moving the Rigidbody in the z axis m_ZAxis = new Vector3(0, 0, 5); } void Update() { //Press space to remove the constraints on the RigidBody if (Input.GetKeyDown(KeyCode.Space)) { //Remove all constraints m_Rigidbody.constraints = RigidbodyConstraints.None; } //Press the right arrow key to move positively in the z axis if the constraints are removed if (Input.GetKeyDown(KeyCode.RightArrow)) { //If the constraints are removed, the Rigidbody moves along the z axis //If the constraints are there, no movement occurs m_Rigidbody.velocity = m_ZAxis; } //Press the left arrow key to move negatively in the z axis if the constraints are removed if (Input.GetKeyDown(KeyCode.LeftArrow)) { m_Rigidbody.velocity = -m_ZAxis; } }}
Fields
Value | Description |
|---|---|
| FreezeAll | Freeze rotation and motion along all axes. |
| FreezePosition | Freeze motion along all axes. |
| FreezePositionX | Freeze motion along the X-axis. |
| FreezePositionY | Freeze motion along the Y-axis. |
| FreezePositionZ | Freeze motion along the Z-axis. |
| FreezeRotation | Freeze rotation along all axes. |
| FreezeRotationX | Freeze rotation along the X-axis. |
| FreezeRotationY | Freeze rotation along the Y-axis. |
| FreezeRotationZ | Freeze rotation along the Z-axis. |
| None | No constraints. |