无论局部角度如何，在全局 XZ 平面上移动相机（Unity）

Question

I am scripting the movement of the main camera on the XZ axis. The camera should move horizontally (forward, back, right, left) when the cursor approaches one of the corresponding screen edges. The right-left movement works perfectecly;

To the left

To the right

on the other hand, moving the camera back-forward on its z axis does not work since the camera is slightly rotated.

Camera tilt

Therefore, when you try to move it forward horizontally, it instead gets closer to the objects.

Closer when it should move forward

Away when it should move back

      if (Input.mousePosition.y >= Screen.height - brdThcknss)
            { //this line is to be replaced
                //transform.Translate(Vector3.forward * Time.deltaTime * panSpeed);
            }
            if (Input.mousePosition.y <= brdThcknss)
            {//this line is to be replaced
                //transform.Translate(Vector3.back * Time.deltaTime * panSpeed);
            }
            if (Input.mousePosition.x >= Screen.width - brdThcknss)
            {
                transform.Translate(Vector3.right * Time.deltaTime * panSpeed);
            }
            if (Input.mousePosition.x <= brdThcknss)
            {
                transform.Translate(Vector3.left * Time.deltaTime * panSpeed);
            }

It is also necessary to mention that the camera should move througout the XZ plane of the world regardless of the angle of the camera (the camera orbits). What could I replace the commented lines for so that the camera performs the desired movement?

Answer 1

AresCaelum's comment is likely correct, but if you'd like to avoid the Translate function altogether, you could simply assign a new Vector3 to the object's position.

Something like:

transform.position = new Vector3(newX, transform.position.y, newZ);

it could also be done on the localPosition like

transform.localposition = new Vector3(x,y,z);

If you want to avoid creating a new Vector3 every time you're running this code, you could simply have a Vector3 variable (let's call it 'pos') and do

Vector3 pos = Vector3.zero;

void Start()
{
   pos.y = whateverYValueYouWant;
}

void Update()
{
    pos.x = newX;
    pos.z = newZ;
    transform.position = pos;
}