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  #1  
Old 01-30-2012, 11:55 AM
Enlil Enlil is offline
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Join Date: May 2008
Posts: 61
Using a texquad to cover a window

Hello,

I was using texquads to blank out a window I made with viz.add(viz.Window) in Vizard 3, but it looks to me like the way texquads work with windows has changed in Vizard 4 (it appears the texquad is in effect behind instead of in front of the window).

So, is there a way to either attach a texquad to a window or is there a better way to fade to black?

Thanks,
Christian
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  #2  
Old 01-30-2012, 02:37 PM
farshizzo farshizzo is offline
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Join Date: Mar 2003
Posts: 2,849
Can you post some sample code? The following script shows one way to use a quad to fade the scene in/out:
Code:
import viz
import vizact
viz.go()

viz.addChild('gallery.osgb')

fadeQuad = viz.addTexQuad(parent=viz.ORTHO)
fadeQuad.setScale([5000,5000,1])
fadeQuad.color(viz.BLACK)
fadeQuad.alpha(0)
fadeQuad.alignment(viz.ALIGN_LEFT_BOTTOM)
fadeQuad.visible(0)

fadeOut = vizact.sequence( vizact.method.visible(1), vizact.fadeTo(1.0,speed=1.0) )
fadeIn = vizact.sequence( vizact.fadeTo(0.0,speed=1.0), vizact.method.visible(0) )

vizact.onkeydown(' ', fadeQuad.runAction, vizact.choice([fadeOut,fadeIn]) )
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  #3  
Old 02-01-2012, 08:20 AM
Enlil Enlil is offline
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Join Date: May 2008
Posts: 61
Sure! I should have done that in the first place. My problem is not covering the whole screen - that still works. It is when I try to cover a sub-window I have a problem, as shown in the following code:
Code:
import viz
viz.go()
env = viz.add('tankmaze.wrl')

UpperRightWindow = viz.add(viz.WINDOW)
# NEED TO TEST REPLACING THESE COMMANDS FOR VIZARD 4
UpperRightWindow.setPosition(0.5, 1.0)
UpperRightWindow.setSize(0.5, 0.5)
UpperRightWindow.visible(0,viz.SCREEN)
'''
quad = viz.addTexQuad(parent=viz.ORTHO, scale=[12.0, 10.0, 10.0],color=viz.BLACK)
quad.alpha(.5)
'''
vq = ViewQuad()    
#quad = viz.add(viz.TEXQUAD)
lake = viz.add('lake3.jpg')
#quad.billboard(viz.BILLBOARD_YAXIS)
#blackScreen = viz.addTexQuad(parent=viz.SCREEN,scale=[100.0]*3,color=viz.BLACK)
blackScreen = viz.addTexQuad(parent=viz.SCREEN,scale=[12.0, 10.0, 10.0],color=viz.BLACK)
blackScreen.setPosition([.5, .5, 0])
blackScreen.texture(lake)
blackScreen.alpha(0.0)

vizact.onkeydown(' ',blackScreen.runAction,vizact.fadeTo(1.0,time=2.0))
The quad covers the screen, but not the window. Normally I am only trying to cover the subwindow, but this shows the difference better.

Thanks,

Christian
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  #4  
Old 02-01-2012, 09:48 AM
Jeff Jeff is offline
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Join Date: Aug 2008
Posts: 2,455
When the parent of the quad is viz.ORTHO you can specify the subwindow to add the quad to with the scene argument:

Code:
import viz
viz.go()

viz.addChild('gallery.osgb')

subWindow = viz.addWindow()
blackScreen = viz.addTexQuad(parent=viz.ORTHO,scene=subWindow,scale=[500]*3,color=viz.BLACK)
blackScreen.alpha(0.0)

vizact.onkeydown(' ',blackScreen.runAction,vizact.fadeTo(1.0,time=2.0))
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  #5  
Old 02-07-2012, 03:13 PM
Enlil Enlil is offline
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Join Date: May 2008
Posts: 61
Thanks, that was just what I needed.

Christian
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