Mouse Picking - stuck (newbie)

Scripting Issues
#1 
'''
Camera Module
'''
#inherited from the parent module:
#import math
#import pandac.PandaModules as panda

global picker, handler, pickerNode, pickerRay

def init():
		global picker, handler, pickerNode, pickerRay
		picker = panda.CollisionTraverser()
		handler = panda.CollisionHandlerQueue()
		pickerNode = panda.CollisionNode('mouseRay')
		pickerNode.setFromCollideMask(panda.BitMask32.bit(1))
		camera.attachNewNode(pickerNode)
		pickerRay = panda.CollisionRay()	       #Make our ray
		pickerNode.addSolid(pickerRay)      #Add it to the collision node
		picker.addCollider(pickerNode, handler)
		
		taskMgr.add(pick, 'picker')

def pick(task):
	if base.mouseWatcherNode.hasMouse():
		mpos = mpos = base.mouseWatcherNode.getMouse()
		
		global pickerRay
		pickerRay.setFromLens(base.camNode, mpos.getX(), mpos.getY())
		
		global picker
		picker.traverse(render)
		if handler.getNumEntries() > 0:
			print 'hit!'
			handler.sortEntries()
			handler.getEntry(0).getIntoNode().hide()
	
	return Task.cont

This is what I have, as a sort of ‘picking’ module for my game.
(note that most modules have been imported in the ‘parent’ module)

I can’t seem to find any tutorials on this, so I have some questions:

  1. have i forgotten anything?
  2. I think I need to add stuff to my nodes, what?
  3. anyone know of any tutorials on this?
#2

How about the “FeatureTutorials–Picking” sample program that is distributed with Panda? Or how about this page in the manual?

David

#3

that tutorial is mostly what I got my code from, but it’s just an example. I think I should get there with your second link, thanks for that one.