c# - Change Material of one game object only using Ray cast and Mouse click -


i created following code see game object click cant find how change material of object click only, changes material of objects have script.

//public  public int tilegroup = 0; //indicates tile group number.  //private  public rigidbody myrigidbody; public renderer myrenderer; public material tiledefaultmaterial; public material tileselectedmaterial; public material tilesamegroupmaterial;  void start () {     myrigidbody = getcomponent<rigidbody> ();     myrenderer = getcomponent<renderer> ();     tiledefaultmaterial = resources.load ("tiledefault", typeof(material)) material;     tileselectedmaterial = resources.load ("tileselected", typeof(material)) material;     tilesamegroupmaterial = resources.load ("tilesamegroup", typeof(material)) material; }  void update () {     if (input.getmousebuttondown (0)) {         tileclick ();     } }  void tileclick (){      raycasthit hitinfo = new raycasthit ();     bool hit = physics.raycast (camera.main.screenpointtoray (input.mouseposition), out hitinfo);      if (hit) {         debug.log ("hit: " + hitinfo.transform.gameobject.name);     }      if (hitinfo.transform.gameobject.tag == "tile") {         debug.log ("hit tile!");         myrenderer.material = tileselectedmaterial;     } else {         debug.log ("hit empty space!");     } }

as running 

void update() {     if(input.getmousebuttondown(0))     {         tileclick();     } }

whenever click (no matter where), input.getmousebutton(0) true in instances of scripts. end changing color of objects. instead can try onmousedown() method.

void onmousedown()  {     tileclick(); }

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