private void OnCollisionStay2D(Collision2D collision)
 {
     if (collision.gameObject.CompareTag("Ground"))
     {
         deformerMesh = collision.gameObject.GetComponent <VertexModifier>();
         if (deformerMesh == null)
         {
             return;
         }
         foreach (var contact in collision.contacts)
         {
             deformerMesh.AddDepression(contact.point, collisionRadius);
         }
     }
 }
 private void Awake()
 {
     deformerMesh = FindObjectOfType <VertexModifier>();
 }