Touch to Shoot

TouchToShoot.cs

using UnityEngine;

public class TouchToShoot : MonoBehaviour {

    public Material hitMaterial;

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {

        if (Input.GetMouseButtonDown(0))
        {
            var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hitInfo;
            if (Physics.Raycast(ray, out hitInfo))
            {
                var rig = hitInfo.collider.GetComponent<Rigidbody>();
                if(rig != null)
                {
                    rig.GetComponent<MeshRenderer>().material = hitMaterial;
                    rig.AddForceAtPosition(ray.direction * 50f, hitInfo.point, ForceMode.VelocityChange);
                }
            }
        }

	}
}