WorldViz User Forum - What a drag?

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- - What a drag? (https://forum.worldviz.com/showthread.php?t=996)

Jerry

02-06-2007 10:09 AM

What a drag?

What is viz.drag() supposed to do? When I run

duck = viz.add('duck.wrl')
duck.translate(0,1.5,4)
viz.grab(viz.Mouse,duck)

the duck moves with the mouse but doesn't stay under the cursor
as one might expect if it were being dragged.

PS - Is Vizard compatible with Vista?

Jerry

02-06-2007 10:10 AM

I meant viz.grab()

farshizzo

02-06-2007 10:19 AM

The viz.grab() command is not meant to be used for dragging objects with the mouse. Look at the tutorial_grab.py script in the [Vizard30]\tutorial\link directory for an example. It's mostly used when you are doing some sort of hand tracking and you want to simulate grabbing an object.

Gladsomebeast

02-07-2007 09:07 AM

viz.grab() with the mouse makes sense if the object you are grabbing is on the screen.

Code:

import viz

viz.go()





screenText = viz.addText('GrabME', viz.SCREEN)

s = 1

screenText.scale(s,s,s)

screenText.setPosition(.5, .5)



grabLink = None



def onMouseDown(button):

        global grabLink

        if grabLink:

                #in case we missed mouse up event

                grabLink.remove()

        grabLink = viz.grab( viz.Mouse, screenText )



viz.callback(viz.MOUSEDOWN_EVENT,onMouseDown)





def onMouseUp(button):

        global grabLink

        grabLink.remove()

        grabLink = None



viz.callback(viz.MOUSEUP_EVENT,onMouseUp)

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