Detect Mouse in right side or left side For Player?

Question

Hello, i use this code to detect Moues Position

  mouse = new Vector2(Input.mousePosition.x, Screen.height - Input.mousePosition.y);
  
 if(mouse.x < Screen.width / 2)
 {
 print("Mouse is on left side of screen.");
 }
  
 if(mouse.x > Screen.width / 2)
 {
 print("Mouse is on right side of screen.");
 }

but there is 1 problem

this code is detect the mouse if right side or left side for the Camera

but i need to detect the mouse if right side or left side for the Player,

because player can move, while camera is static [not moving with player]

alt text

Answer 1

Best Answer

Answer by whydoidoit · Feb 15, 2014 at 01:44 PM

You want to use Camera.WorldToScreenPoint to convert the coordinate of the player to the screen and then work out if the mouse is left or right of the player.

    var playerScreenPoint = Camera.main.WorldToScreenPoint(player.transform.position);

     if(mouse.x < playerScreenPoint.x) {
         ... 
     } else {
        ....
     }

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D3m0nE · Feb 15, 2014 at 01:48 PM 0

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Thank you :) thats working fine

whydoidoit · Feb 15, 2014 at 01:49 PM 0

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No problem :)

Answer 2

Answer by erick_weil · Feb 15, 2014 at 12:04 PM

place a plane as background to your scene, and change the name of player to player ant try out this:

 mouse = Vector2(Input.mousePosition.x,Input.mousePosition.y);
 var player : Vector3 = GameObject.Find("player").transform.position;
 var ray : Ray;
 ray = Camera.main.ScreenPointToRay(mouse);
 var hit : RaycastHit;
 
     if(Physics.Raycast(ray,hit,500))
     {
     //drawray only to visualize
     Debug.DrawRay(Camera.main.transform.position,ray.direction*hit.distance,Color.green);
     if(hit.point.x < player.x)
     print("Mouse is on left side of player.");
     else
     print("Mouse is on right side of player.");
     }

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D3m0nE · Feb 15, 2014 at 01:15 PM 0

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works fine . thanks but is there way without using plane as background?

erick_weil · Feb 15, 2014 at 01:36 PM 1

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why?, any collider will work, and if you disable the Mesh renderer in the plane you will get same results.

if have problems by the other objects in the front, if your camera is ortographic, just put the plane very very near from the camera. but if is not, I dont know how you solve this

D3m0nE · Feb 15, 2014 at 01:47 PM 0

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okey. :) thanks for help

Detect Mouse in right side or left side For Player?

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