Question regarding GUI sliders

[realvision]

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!

[farshizzo]

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:

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)

[farshizzo]

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:

slider.setEuler(0,0,90)

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:

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)