CODEWITHSUNDEEP
c#unity-game-engine
user11458208
user11458208

Reputation:

Detect which direction the camera is facing?

I want to detect if the camera if facing Left/Right/Forward/Back. I have started with a script but it only points to the right side. How do I determine the axis at which the camera faces?

void Update () 
    {
        Vector3 dir = Camera.main.transform.forward;
        float absX = Mathf.Abs (dir.x);
        float absY = Mathf.Abs (dir.y);
        float absZ = Mathf.Abs (dir.z);

        if (absX > absY && absX > absZ) 
        {
            if (absX > 0f)
            {
                Debug.Log("RIGHT");
            }
            
            else 
            {
                Debug.Log("LEFT");
            }
        }

Upvotes: 0

Views: 163

Answers (1)

derHugo
derHugo

Reputation: 90580

Well an absolute value in mathematics and used by you in

absX = Mathf.Abs (dir.x);

will always be a positive value.

What you rather want to use would be the original dir.x

// in general you should not use Camera.main repeatedly!
// if possible already reference it here
[SerializeField] private Camera _camera;

// Otherwise get it ONCE on runtime
private void Awake()
{
    if(!_camera) _camera = Camera.main;
}

void Update () 
{
    Vector3 dir = _camera.transform.forward;
    float absX = Mathf.Abs (dir.x);
    float absY = Mathf.Abs (dir.y);
    float absZ = Mathf.Abs (dir.z);

    if (absX > absY && absX > absZ) 
    {
        if (dir.x >= 0f)
        {
            Debug.Log("RIGHT");
        }
        else
        {
            Debug.Log("LEFT");
        }
    } 
    else if(absY > absZ) // absY > abs X is already implicit
    {
        if (dir.y >= 0f)
        {
            Debug.Log("UP");
        }
        else
        {
            Debug.Log("DOWN");
        }
    }
    else // both absZ > absY && absZ > absX are implicit
    {
        if (dir.z >= 0f)
        {
            Debug.Log("FORWARD");
        }
        else
        {
            Debug.Log("BACKWARD");
        }
    }
}

Upvotes: 1

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