rigidbody.velocity problem

Questions & Answers
1

Hey I was wondering why this line of coding is not working. I am getting the following error: “Cannot modify a value type return value of `UnityEngine.Rigidbody.velocity’. Consider storing the value in a temporary variable”. Anybody know what I can do?

Update: When the rigidbody.velocity line variable is above the horizontalMovement, than I get very jerky results but the stopping works. If I do it vice versa, movement works fine but stopping doesn’t.

//Checks how fast player is moving
	horizontalMovement = new Vector2(rigidbody.velocity.x, rigidbody.velocity.z);
	rigidbody.velocity = new Vector3(horizontalMovement.x, rigidbody.velocity.y, horizontalMovement.y);
		
	//If movement exceeds Max Walk Speed
	if(horizontalMovement.magnitude > maxWalkSpeed)
		{
		//Normalize it
		horizontalMovement = horizontalMovement.normalized;
		//Reset it to Max Walk Speed
		horizontalMovement *= maxWalkSpeed;
		}
	
	if(Input.GetAxis("Horizontal") == 0 && Input.GetAxis("Vertical") == 0 && grounded == true)
		{
			Vector3 velocity = rigidbody.velocity;
			velocity.x = Mathf.SmoothDamp(rigidbody.velocity.x, 0, ref walkDeaccelerationVolx, walkDeacceleration);
			velocity.z = Mathf.SmoothDamp(rigidbody.velocity.z, 0, ref walkDeaccelerationVolz, walkDeacceleration);
			rigidbody.velocity = velocity;
		}
2

In C# you have to do:

Vector3 velocity = rigidbody.velocity;
velocity.x = Mathf.SmoothDamp(rigidbody.velocity.x, 0, ref walkDeaccelerationVolx, walkDeacceleration);
velocity.z = Mathf.SmoothDamp(rigidbody.velocity.z, 0, ref walkDeaccelerationVolz, walkDeacceleration);
rigidbody.velocity = velocity;

Note typing the error message along the word “Unity3d” into Google will get you lots of hits/solutions for most Unity errors.