WorldViz User Forum - getVisible unexpected behaviour

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- - getVisible unexpected behaviour (https://forum.worldviz.com/showthread.php?t=4013)

getVisible unexpected behaviour

I wanted to use the visibility of a object to execute (or not) certain code in a vizAction to my surprise all object returned getVisible() is True while I knew that the certain parent object where invisible. A simple test confirmed that child object don't return the correct visibility value

Code:

groupA = viz.addGroup()

groupB = viz.addGroup(parent = groupA)



groupA.visible(viz.OFF)

print groupB.getVisible()



>>> True

Is this a bug or by design and in case of the second reason is there a function that will give the result I need?

This is by design. The node.getVisible() command returns the visible flag of the node. It does not take into account the visible flag of any parents.

You can use the node.getParents() command to determine the visibility state taking into account all parent nodes. Example:

Code:

import viz

import vizact

viz.go()



group1 = viz.addGroup()

group2 = viz.addGroup(parent=group1)

ball = viz.addChild('beachball.osgb',parent=group2,pos=(0,1.8,2))



label = viz.addText('',parent=viz.ORTHO,fontSize=50,pos=(10,10,0))



def isNodeActuallyVisible(node):

        if not node.getVisible():

                return False

        parents = node.getParents()

        if parents:

                return any(isNodeActuallyVisible(p) for p in parents)

        return True



def UpdateLabel():

        if isNodeActuallyVisible(ball):

                label.message('visible')

        else:

                label.message('not visible')

vizact.ontimer(0,UpdateLabel)



vizact.onkeydown('1',group1.visible,viz.TOGGLE)

vizact.onkeydown('2',group2.visible,viz.TOGGLE)

vizact.onkeydown('3',ball.visible,viz.TOGGLE)