WorldViz User Forum - 3D cursor with FlockOfBirds

Here is a sample script that does what you want. It uses physics shapes to check if models are colliding. If they are, it sets up a "grab" link between the models.

Code:

import viz

viz.go()

viz.clearcolor(viz.SKYBLUE)

viz.MainView.setPosition([0,0,-3])



viz.phys.enable()



logo = viz.add('logo.wrl', pos=[1,0,0])

logo.collideMesh()

marker = viz.add('marker.wrl', pos=[-1,0,0])

marker.collideMesh()

duck = viz.add('duck.cfg', pos=[0,1,0])

duck.collideMesh()



#Add the object that will do the grabbing

hand = viz.add( 'hand.cfg' )

hand.setScale([3,3,3])

hand.translate( 0, 0, 0 )

hand.collideMesh()



grabLink = None #The handle to the link object



#Grab or let go of the ball

def tryGrab():

        global grabLink

        nodes = viz.phys.intersectNode(hand)

        if len(nodes) > 0: #if list is not empty

                grabLink = viz.grab( hand, nodes[0] )

                

def drop():

        global grabLink

        grabLink.remove()

        grabLink = None



def grabOrDrop():

        if grabLink:

                drop()

        else:

                tryGrab()

                

vizact.onkeydown(' ',grabOrDrop)





#Setup keyboard control of hand

vizact.whilekeydown(viz.KEY_UP,hand.translate,0,vizact.elapsed(1),0,viz.RELATIVE_WORLD)

vizact.whilekeydown(viz.KEY_DOWN,hand.translate,0,vizact.elapsed(-1),0,viz.RELATIVE_WORLD)

vizact.whilekeydown(viz.KEY_RIGHT,hand.translate,vizact.elapsed(1),0,0,viz.RELATIVE_WORLD)

vizact.whilekeydown(viz.KEY_LEFT,hand.translate,vizact.elapsed(-1),0,0,viz.RELATIVE_WORLD)



vizact.whilekeydown('w',hand.rotate,1,0,0,vizact.elapsed(90),viz.RELATIVE_WORLD)

vizact.whilekeydown('s',hand.rotate,1,0,0,vizact.elapsed(-90),viz.RELATIVE_WORLD)

vizact.whilekeydown('d',hand.rotate,0,1,0,vizact.elapsed(90),viz.RELATIVE_WORLD)

vizact.whilekeydown('a',hand.rotate,0,1,0,vizact.elapsed(-90),viz.RELATIVE_WORLD)