WorldViz User Forum - Moving/grabbing 3D objects

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- - Moving/grabbing 3D objects (https://forum.worldviz.com/showthread.php?t=3975)

Moving/grabbing 3D objects

Hi,

Is there any kind of example (something to start from) to move&grab objects from a place to another with the mouse, like in the following video:

http://www.youtube.com/watch?v=7qHPwqSsFZU

Best regards,

Alex.

how to grab and move objects using mouse

Can anyone please help me on how i can grab and move objects in vizard 4 using mouse.

Waiting for a reply.Thanks a ton in advance.

Regards

Amith

You can use the viz.grab command to grab objects:

Code:

import viz

import vizact

import viztracker



viz.setMultiSample(4)

viz.fov(60)

viz.go()



viz.addChild('ground.osgb')

viz.clearcolor(viz.GRAY)



#Add the object that will do the grabbing

hand = viz.addChild('marker.wrl')



#link the hand to a 3D mousetracker

mouseTracker = viztracker.MouseTracker()

mouseTracker.scroll(-8)

viz.link(mouseTracker,hand)



#turn off mouse navigation and hide cursor

viz.mouse(viz.OFF)

viz.mouse.setVisible(viz.OFF)



#Add the object that the marker will grab

ball = viz.addChild( 'basketball.osgb',pos=[0.5,1.8,2.5],scale=[2,2,2])



link = None #The handle to the link object

def grabBall():

        global link

        link = viz.grab( hand, ball )

                

def releaseBall():

        global link

        link.remove()

        link = None

        

vizact.onmousedown(viz.MOUSEBUTTON_LEFT,grabBall)

vizact.onmouseup(viz.MOUSEBUTTON_LEFT,releaseBall)

If you want a hand model that's animated when it grabs take a look at Grabbing with viztracker. That requires a configuration file that you create using the viztrackersetup utility. Make sure have Keybd w/ Mouse Hands set for tracker type, as shown in the image.

Thank you so much for the reply.

Do you have any idea about how i can do the similar thing using a Wii.

Thanks a ton in advance.

There's documentation for the wiimote plug-in the Vizard Help. Also if you search for wiimote in these forums you'll find some example code. You can use vizact.onupdate or vizact.ontimer to register a callback function that gets called every frame. Within your function you can update the hand position based on wiimote data.