Using both Input.GetAxis and Input.GetAxisRaw

Question

Hi all,

Currently, I am trying to use both GetAxisRaw (for ground movement) and GetAxis (for air movement) in my game. The reason I have configured it like this is because when I jump in my game with horizontal movement for example, I want the momentum to keep the player going.

If I use GetAxisRaw for this, the value changes from 1 to 0 instantly and the player stops moving as soon as I let go of the button.

The code is as follows:

 if (controller.isGrounded)
 {
      horizontal = Input.GetAxisRaw("Horizontal");
      vertical = Input.GetAxisRaw("Vertical");
 
 }
 else if (!controller.isGrounded)
 {
     horizontal += Input.GetAxis("Horizontal");
     vertical += Input.GetAxis("Vertical");
 }

This works fine and gives me the desired affect. The problem is when my player is grounded and starts running, if I'm holding down two keys (W + A for example), it appears as though the GetAxis value is increasing because if I let go of one of the keys (A in this case) and then jump, my player jump diagonally instead of forward.

I can see in the inspector that both horizontal and vertical values are at 1 or 0 in the inspector, but as soon as I jump, the value changes to a float range equal to how long I was holding the button, leading to diagonal jumping.

Does anyone know why the axis value is increasing even when I'm grounded? Or how I can prevent this problem? I hope I explained it well, let me know if I can provide any further information.

Regards Jason

Answer 1

Just in case anyone was facing a similar issue, I found the following post on the unity forums which helped alot : https://forum.unity.com/threads/fps-character-controller-momentum-solution.894523/

With this, I was able to achieve my desired affect by removing the GetAxis call and storing air movement in a separate vector

 //Checking for horizontal and vertical inputs
         float horizontal = Input.GetAxisRaw("Horizontal");
         float vertical = Input.GetAxisRaw("Vertical");

     input = new Vector3(horizontal, 0.0f, vertical);
     Vector3 forward = Vector3.Scale(mainCam.transform.forward, new Vector3(1, 0, 1)).normalized;
     input = (vertical * forward + horizontal * mainCam.transform.right).normalized;

     if(controller.isGrounded)
     {
         if (input.x != 0)
         {
             move.x += input.x * playerSpeed;
         }
         else
         {
             move.x = 0;
         }

         if(input.z != 0) 
         {
             move.z += input.z * playerSpeed;
         }
         else
         {
             move.z = 0;
         }
     }
     else
     {
         move.x += input.x * (playerSpeed / 2);
         move.z += input.z * (playerSpeed / 2);
     }
     move = Vector3.ClampMagnitude(move, playerSpeed);

     controller.Move(move * Time.deltaTime);
     playerVelocity.y += gravityValue * Time.deltaTime;
     controller.Move(playerVelocity * Time.deltaTime);

Cheers

Using both Input.GetAxis and Input.GetAxisRaw

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