Physics.Raycast

Syntax :

static function Raycast (origin : Vector3, direction : Vector3, distance : float = Mathf.Infinity, layerMask : int = kDefaultRaycastLayers) : bool

Parameters


origin	The starting point of the ray in world coordinates.
direction	The direction of the ray.
distance	The length of the ray
layerMask	A Layer mask that is used to selectively ignore colliders when casting a ray.

Returns

bool - True when the ray intersects any collider, otherwise false.

Description

Casts a ray against all colliders in the scene.

Use in Game :

First we need to declare it like this in our Script .

void Update ()
{
  ray = Camera.main.ScreenPointToRay(Input.mousePosition);
  if(Physics.Raycast(ray, out hit)&& Input.GetButtonDown("Fire1"))
  {
    Debug.Log(hit.collider.tag);
    if(PreviousClick == 0)
     {
      if(hit.collider.tag == "Character")
       {
        Debug.Log("in if " + hit.collider.tag);
        PreviousClick = 1;
        sourceTag = hit.collider.name;
    x_currPos =(int(hit.collider.gameObject.transform.position.x / tileSizeAdjustment);
    y_currPos = (int)(hit.collider.gameObject.transform.position.y / tileSizeAdjustment);
        hit.collider.gameObject.renderer.material.color = Color.red;
        //hit.collider.gameObject.renderer.material.color = Color.green;
         Debug.Log(sourceTag);
          }
          else if(hit.collider.tag == "PlaceHolder")
       {
          Debug.Log("Can't Move object ov there");
          return;
       }
   }
}