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  #1  
Old 03-17-2008, 04:08 AM
dan12345 dan12345 is offline
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Join Date: Jan 2008
Posts: 58
Question regarding GUI sliders

Hello - i want to add several GUI sliders to my program - inspired by
the slider tutorial.
The problem is that i want each slider to perform different functionality -
and there is no identification for each slider.
Anyway to fix this? does a slider obj have maybe an identity function?
Thanks,
Dan
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  #2  
Old 03-17-2008, 09:49 AM
realvision realvision is offline
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Join Date: Mar 2008
Posts: 11
Lightbulb 2nd question - IS vertical slider possible?

Hi all,
As I am slowly learning the very basics, I would really like some help to know the following...

is it possible to display a gui slider vertically?

I have displayed one horizontally and after much fiddling around (I dont know python, still learning slowly) I managed to do what i want , i.e i wanted to display an object and scale it bigger and smaller with a slider with this code
def myslider(obj, pos):
bed.setScale( .01*pos, .01*pos, .01*pos )

viz.callback(viz.SLIDER_EVENT,myslider)

However, can I add:

1) a vertical slider so that the object can be moved up and down? if so what would the code look like?

2) I wanted to use a live webcam as the background image. there is a tutorial that maps the webcam as a texture to a quad.
Can the live webcam image just be mapped as the "background" just like you can clear the background to a basic color, can it be "cleared" to the webcam image?

I tried unsuccessfully to map the webcam live image to the skydome, but that just distorts the webcam image

Thanks in advance!
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  #3  
Old 03-17-2008, 10:41 AM
farshizzo farshizzo is offline
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Join Date: Mar 2003
Posts: 2,849
The identity of a slider object is the object itself. Have a look at the docs for viz.SLIDER_EVENT, it explains how to determine which slider has changed. You can also use vizact.onslider for setting up callbacks for individual slider changes. Here is some sample code:
Code:
import viz
viz.go()

slider1 = viz.addSlider(pos=(0.5,0.1,0))
slider2 = viz.addSlider(pos=(0.5,0.2,0))

def Slider1Change(pos):
	print 'Slider 1 pos',pos
vizact.onslider(slider1,Slider1Change)

def Slider2Change(pos):
	print 'Slider 2 pos',pos
vizact.onslider(slider2,Slider2Change)
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  #4  
Old 03-17-2008, 10:58 AM
farshizzo farshizzo is offline
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Join Date: Mar 2003
Posts: 2,849
Quote:
1) a vertical slider so that the object can be moved up and down? if so what would the code look like?
You can make a slider vertical by rotating it 90 degrees along the z-axis. Here is what the code would look like:
Code:
slider.setEuler(0,0,90)
Quote:
2) I wanted to use a live webcam as the background image. there is a tutorial that maps the webcam as a texture to a quad.
Can the live webcam image just be mapped as the "background" just like you can clear the background to a basic color, can it be "cleared" to the webcam image?
Here is some sample code showing how to have a texture show up as the background:
Code:
import viz
viz.go()

viz.add('tut_ground.wrl')


tex = viz.add('ball.jpg')

def setBackgroundTexture(tex):
	background = viz.addRenderNode()
	background.setHUD(0,100,0,100,True)
	background.setOrder(viz.PRE_RENDER)
	background.texture(tex)
	viz.MainWindow.setClearMask(viz.GL_DEPTH_BUFFER_BIT)
	
setBackgroundTexture(tex)
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  #5  
Old 03-19-2008, 05:23 AM
realvision realvision is offline
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Join Date: Mar 2008
Posts: 11
Thank you for the code Farshizzo.
I do think I need to read a lot more! I was thinking adding a texture as background would be a one line code :-)

I tried out your example and it does work, but I have no clue as to how to make the live camera appear as the backgorund. Simply substituting 'cam' in place of tex in the above example does not do it

Regards
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  #6  
Old 03-19-2008, 10:28 AM
realvision realvision is offline
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Join Date: Mar 2008
Posts: 11
P.s I just had to at least buy a Lite lisence while i keep asking so many questions.
So I did
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  #7  
Old 03-19-2008, 11:25 AM
farshizzo farshizzo is offline
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Join Date: Mar 2003
Posts: 2,849
I replaced the ball texture with a webcam texture and it worked fine for me. Here is the code:
Code:
import viz
viz.go()

viz.add('tut_ground.wrl')

video = viz.add('VideoCamera.dle')
webcam = video.addWebcam()

def setBackgroundTexture(tex):
	background = viz.addRenderNode()
	background.setHUD(0,100,0,100,True)
	background.setOrder(viz.PRE_RENDER)
	background.texture(tex)
	viz.MainWindow.setClearMask(viz.GL_DEPTH_BUFFER_BIT)
	
setBackgroundTexture(webcam)
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  #8  
Old 03-19-2008, 12:47 PM
realvision realvision is offline
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Join Date: Mar 2008
Posts: 11
works! I was adding an un nessary line.
Thanks farshizzo!
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