Question How do I make sure character appears to move at same speed vertically and horizontally?

I am making an isometric game in the style of Hades, I am struggling to get my character to move in "screen space", meaning I want it to appear to move at same speed vertically and horizontally. Atm vertically appears much slower.

Code (CSharp):

1. private void Update()
2.     {
3.         float horizontalInput = 0;
4.         float verticalInput = 0;
5.  
6.         if (Input.GetKey(KeyCode.W)) verticalInput = 1;
7.         if (Input.GetKey(KeyCode.S)) verticalInput = -1;
8.         if (Input.GetKey(KeyCode.D)) horizontalInput = 1;
9.         if (Input.GetKey(KeyCode.A)) horizontalInput = -1;
10.  
11.         // Get the camera's forward and right vectors in screen space
12.         Vector3 cameraForward = mainCamera.transform.forward;
13.         Vector3 cameraRight = mainCamera.transform.right;
14.  
15.         cameraForward.y = 0f; // Ignore vertical component
16.         cameraRight.y = 0f; // Ignore horizontal component
17.  
18.         // Normalize the camera vectors
19.         cameraForward.Normalize();
20.         cameraRight.Normalize();
21.  
22.         Vector3 move = (cameraForward * verticalInput) + (cameraRight * horizontalInput);
23.         move.Normalize();
24.  
25.         characterController.Move(move * Time.deltaTime * speed);
26.     }

 

First of all, you could use input axis to make the whole input part a lot more convenient to work with:

Code (CSharp):

1. float h = Input.GetAxis("Horizontal");
2. float v = Input.GetAxis("Vertical");

You can also turn it into an input vector and normalize that to get a consistant vector length, independant of the inputs. Right now you can independantly move at 1 vertically and 1 horizontally, which may or may not be what you want. Edit: Well you normalized the move vector afterwards tho

Code (CSharp):

1. Vector2 input = new Vector2(h, v).normalized();

With that out of the way, i dont think it's a good idea to base your movement directons on the camera perspective. Is there any reason the game should not play the same, independant of how you look at it? I would simply base the movement direction on the forward and right of the object itself. You can then, if you need to, scale the movement accordingly depending on the camera perspective, to adjust for how the movement speed "feels".

 

Not sure why its odd, its how Hades does it.

I tried scaling it with something like this, but gave me same "issue" :

Code (CSharp):

1.  float cameraAngle = Vector3.Angle(mainCamera.transform.forward, Vector3.up);
2. movementScale = Mathf.Cos(cameraAngle * Mathf.Deg2Rad);

 

Its exactly what I want, I do not want the acceleration that comes with using the axis directly.

 

https://docs.unity3d.com/ScriptReference/Input.GetAxisRaw.html