Question by WalidKhairy · May 24, 2015 at 02:59 PM · camera rotation movement translate worldspace

[Solved] Translating Camera on only X, Z axis on World Space, no matter what is the rotation

I'm using a panning script for a top down camera, with a default localEulerAngles of (90, 0, 0) & it works fine in this default case

 void Update(){
     if(Input.GetMouseButtonDown(0))
     {
         mouseOrigin = Input.mousePosition;
         isPanning = true;
     }
     
     if (!Input.GetMouseButton(0)) 
              isPanning=false;
     
     if (isPanning)
     {
              Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - mouseOrigin);
              Vector3 move = new Vector3(pos.x * panSpeed * -1, 0, pos.y * panSpeed * -1);
              transform.Translate(move, Space.World);
     }
 }

so dragging form up to down screen, makes the camera goes forward from left to right the screen, makes it translate to the left and so on for Down & right directions

the problem is once the camera being rotated in the y axis, the panning actions change, so the dragging up makes the camera goes right instead of forward, and dragging to the left makes the camera goes forward .. that's because i'm using Space.World

I tried using Space.Self, but when the camera being rotated in the x axis, Forward & Backward work as Up & Down.

I want to translate camera with touch, in X & Z axis, without caring about the camera rotation

Any one can help ? alt text

panning.png (79.0 kB)

Add comment · Show 3

Side · May 24, 2015 at 03:51 PM 1

@WalidKhairy Change it's position directly instead of using Translate().

 transform.position += move;

Did it work?

WalidKhairy · May 24, 2015 at 06:06 PM 0

@Side Ok, That solves the movement whatever the rotation around x is. i have to change Vector move to:

 Vector3 move = new Vector3(pos.y * panSpeed, 0, pos.x * panSpeed * -1);
 transform.position += move;

then it works BUT, when the camera is being rotated around Y axis, moving Forward & backward swapped with right & left !! Now what?

WalidKhairy · May 25, 2015 at 11:44 AM 0

@Side ... ok, i figured it out I had to handle the case of rotation around Y axis, manually

     float ang = Camera.main.transform.localEulerAngles.y;
     // move vector ( forward/backward , up/down , right/left );
     if(ang >= 225 && ang < 315)
         move = new Vector3(pos.y * panSpeed, 0, pos.x * panSpeed * -1);
     else if(ang >= 45 && ang < 135)
         move = new Vector3(pos.y * panSpeed * -1, 0, pos.x * panSpeed);
     else if(ang >= 135 && ang < 315)
         move = new Vector3(pos.x * panSpeed, 0, pos.y * panSpeed);
     else if((ang >= 315 && ang < 360) || (ang >=0 && ang < 45))
         move = new Vector3(pos.x * panSpeed * -1, 0, pos.y * panSpeed * -1);
     
     transform.position += move;

Now it works fine

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[Solved] Translating Camera on only X, Z axis on World Space, no matter what is the rotation

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