Show/Hide nodes

function showNode(view,node) {
  node.show(true);
  var parent=node.parent;
  while(parent) // traverse scene to the root node and hide all objects except parent of our node
 	  {	  
	 	  // hide object attached to parent node
	 	  if(parent.object)parent.setState(iv.NS_VIS_CHILDREN,iv.NS_VIS_THIS|iv.NS_VIS_CHILDREN);
	 	  else parent.show(true);
	 	  var n=parent.firstChild;
	 	  while(n)
	 	  {
	 	  // skip lights
	             if((n!=node) && (!(n.object && n.object instanceof iv.light)))n.show(false);
	 	     n=n.next;
	 	  }
	 	  node=parent;
	 	  parent=parent.parent;
	  }
if(view)view.invalidate(iv.INV_STRUCTURE);// update shadows
}

// test function
function testShow()
{
  var a=view3d.searchNode("Object_A")
  if(a)showNode(view3d,a);
}