Can't move gameObject using rigidbody.MovePosition()

Hi guys, I'm trying to create a player controller by using rigidbodies.

void Movement()
{
float xInput = Input.GetAxis("Horizontal") * playerSpeed * Time.deltaTime;
float zInput = Input.GetAxis("Vertical") * playerSpeed * Time.deltaTime;

Vector3 zCurrentPosition = transform.position + (transform.forward * zInput);
Vector3 xCurrentPosition = transform.position + (transform.right * xInput);

rb.MovePosition(zCurrentPosition); //forward Movement
rb.MovePosition(xCurrentPosition); //side Movement
}
I don't quite understand why I can get one Input to work at a time, but not both inputs. If I were to remove rb.MovePosition(xCurrentPosition) then rb.MovePosition(zCurrentPosition) would be able to work. But adding both lines of code makes rb.MovePosition(zCurrentPosition) unable to work.

 

When you're doing this:

Code (csharp):

1. rb.MovePosition(zCurrentPosition);

You're setting the position of the rigidbody to zCurrentPosition.
When on the very next line you do this:

Code (csharp):

1. rb.MovePosition(zCurrentPosition);

You're also directly setting the position, overwriting the result of the last line of code.

What you want too do is to accumulate the movement into one variable:

Code (csharp):

1. // instead of:
2. Vector3 zCurrentPosition = transform.position + (transform.forward * zInput);
3. Vector3 xCurrentPosition = transform.position + (transform.right * xInput);
4.  
5. //Do
6. Vector3 newPosition = transform.position + (transform.forward * zInput) + (transform.right * xInput);
7.  
8. //Instead of
9. rb.MovePosition(zCurrentPosition); //forward Movement
10. rb.MovePosition(xCurrentPosition); //side Movement
11.  
12. //Do:
13. rb.MovePosition(newPosition);

 

Wow this helped alot! thank you kind sir!