Diagonal Movement

Questions & Answers
1

Hello guys, I’m with one doubt, related to the diagonal movement, I’ve searched for questions like this, but the diagonal script movement is already made, so as a beginner I have a doubt about how can i do the diagonal movement, I’m using a script like this to make the movement of anything:

void Update() {
    if(Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow)) {  
	transform.Translate(Vector3.forward*SpeedZ);  	
    }  
    else if(Input.GetKey(KeyCode.S)||Input.GetKey(KeyCode.DownArrow)) {  
	transform.Translate(Vector3.back*SpeedZ);  
    }
    else if(Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow)) {  
	transform.Translate(Vector3.left*SpeedX);  
    }    
    else if(Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow)) {    
	transform.Translate(Vector3.right*SpeedX);  
    }  
}

So the diagonal movement is described by the drawing that I’ve made

[17209-diagonal+movement.png|17209]

The Cartesian plane that I’ve made, representing the vectors of the movement, and the vectors of the diagonal movement, so my question is, how can I do it? I’ve thought in divide by e.g the vectors W by D to achieve the diagonal movement forward right, something like that:

Vector2 diagonal = W_Movement/D_Movement;

The W_Movement is a Vector, so I don’t know if this is right, I want to understand how it works in the Cartesian plane, and if my propose it’s right!

2

The way to get a diagonal is to add the two vectors together. You will want to normalize the result. If you give up on independent speed for x and z, you can rework you code as follows:

var speed = 2.0;

function Update() {
	var v3 : Vector3;
	
if(Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow)) {  
    v3 += Vector3.forward;  
    }  
    if(Input.GetKey(KeyCode.S)||Input.GetKey(KeyCode.DownArrow)) {  
    v3 += Vector3.back;  
    }
    if(Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow)) {  
    v3 += Vector3.left;  
    }    
    else if(Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow)) {    
    v3 += Vector3.right; 
    }  
    
    transform.Translate(speed * v3.normalized * Time.deltaTime);	
}

FYI: this code can be written much simpler with Input.GetAxis(). The ‘Horizontal’ and ‘Vertical’ axes are already setup and include the keys you are using. Example:

var speed = 2.0;

function Update() {
	var v3 = Vector3(Input.GetAxisRaw("Horizontal"), 0.0, Input.GetAxisRaw("Vertical"));
    transform.Translate(speed * v3.normalized * Time.deltaTime);	
}

Note if you replace ‘GetAxisRaw’ with ‘GetAxis’ in the two places it is used, your object will have a bit of momentum carry through.