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  #1  
Old 06-04-2010, 05:32 AM
4711 4711 is offline
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Join Date: Jan 2010
Posts: 15
Simple Joystick Question

Hi all,

I have a question concerning the joystick buttons which is probably rather easy to be answered: How can I make my script to wait for the user to press one of the two buttons of a connected joystick.

My guess was:
Code:
import viz
import vizjoy
import viztask

viz.go()

joystick = vizjoy.add()

def WaitForButtonPress():
	yield viztask.waitButtonDown(None)
	print "Done."
	viz.quit()
	
viztask.schedule( WaitForButtonPress() )
It works fine if one replaces the "Button" by "Key" in the yield-expression, so I would have expected it to run for the joystick buttons as well. However, it does not, so what works?
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  #2  
Old 06-04-2010, 12:50 PM
Jeff Jeff is offline
WorldViz Team Member
 
Join Date: Aug 2008
Posts: 2,448
The viztask.waitButtonDown command waits for a GUI button object to be pressed. To wait for a joystick button press in your task function you can create a custom condition. The task function in the following example waits for either buttons 1 or 2 to be pressed before it continues:
Code:
import viz
import viztask
import vizjoy

viz.go()
joystick = vizjoy.add()

def buttonTask():
	
	d = viz.Data()
	waitButton1 = waitJoyButtonDown(joystick,1)
	waitButton2 = waitJoyButtonDown(joystick,2)
	
	yield viztask.waitAny([waitButton1,waitButton2],d)
	
	if d.condition is waitButton1:
		print 'button 1 was pressed'
	else:
		print 'button 2 was pressed'
		
	viz.quit()	

class waitJoyButtonDown( viztask.Condition ):
    def __init__( self, joy, button ):
        self._joy = joy
        self._button = button
   
    def update( self ):
        return self._joy.isButtonDown(self._button)

viztask.schedule( buttonTask() )
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  #3  
Old 06-07-2010, 07:06 AM
4711 4711 is offline
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Join Date: Jan 2010
Posts: 15
Hi Jeff,

thanks for the clarification on the viztask.waitButtonDown command and also for your code which works fine for me!
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