WorldViz User Forum - changing the gain of a joystick during a program

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changing the gain of a joystick during a program

Hi,

I want to change the gain of the joystick by altering the scalar constant (in this case MOVE_SPEED)- so effectively the speed will alter - at a certain point in my program (22secs in). Here's what I have so far:

Code:

def UpdateJoystick1():

    #Get the joystick position

    x,y,z = joy.getPosition()

    

    #Move the viewpoint forward/backward based on y-axis value

    if abs(y) > 0.0001: #Make sure value is above a certain threshold

        viz.MainView.move(0,0,-y*MOVE_SPEED,viz.BODY_ORI)

    #Move the viewpoint left/right based on x-axis value

    if abs(x) > 0.001: #Make sure value is above a certain threshold

        viz.MainView.move(x*0.1,0,0,viz.BODY_ORI)

    #Turn the viewpoint left/right based on twist value

    #if abs(twist) > 0.001: #Make sure value is above a certain threshold

    #    viz.MainView.rotate(0,1,0,twist,viz.BODY_ORI,viz.RELATIVE_WORLD)





#UpdateJoystick every frame

vizact.ontimer(0,UpdateJoystick1)





def UpdateJoystick2():

    #Get the joystick position

    x,y,z = joy.getPosition()

    

    #Move the viewpoint forward/backward based on y-axis value

    if abs(y) > 0.0001: #Make sure value is above a certain threshold

        viz.MainView.move(0,0,-y*MOVE_SPEED2,viz.BODY_ORI)

    #Move the viewpoint left/right based on x-axis value

    if abs(x) > 0.001: #Make sure value is above a certain threshold

        viz.MainView.move(x*0.1,0,0,viz.BODY_ORI)

    #Turn the viewpoint left/right based on twist value

    #if abs(twist) > 0.001: #Make sure value is above a certain threshold

    #    viz.MainView.rotate(0,1,0,twist,viz.BODY_ORI,viz.RELATIVE_WORLD)





#UpdateJoystick every frame

vizact.ontimer2(22,0,UpdateJoystick2)

but it doesn't seem to make a difference at all - is it because it just comes on at the 22 sec point and then reverts back to the original joystick code? Would I need to insert starttimer and killtimer statements to initiate the two sections?
Any help - as usual - will be greatly appreciated!

UpdateJoystick1 is being called every frame. UpdateJoystick2 is only called once after 22 seconds. I don't think you need two different functions here. You could just change the value of MOVE_SPEED after 22 seconds.

I tried using this code

Code:

def UpdateJoystick1():

    #Get the joystick position

    x,y,z = joy.getPosition()

    

    #Move the viewpoint forward/backward based on y-axis value

    if abs(y) > 0.0001: #Make sure value is above a certain threshold

        viz.MainView.move(0,0,-y*MOVE_SPEED,viz.BODY_ORI)

    #Move the viewpoint left/right based on x-axis value

    if abs(x) > 0.001: #Make sure value is above a certain threshold

        viz.MainView.move(x*0.1,0,0,viz.BODY_ORI)

    #Turn the viewpoint left/right based on twist value

    #if abs(twist) > 0.001: #Make sure value is above a certain threshold

    #    viz.MainView.rotate(0,1,0,twist,viz.BODY_ORI,viz.RELATIVE_WORLD)





#UpdateJoystick every frame

vizact.ontimer(0,UpdateJoystick1)



def MOVE_SPEEDCH():

        MOVE_SPEED=0

vizact.ontimer(22,MOVE_SPEEDCH)

but it still made no difference - I'm sorry I must be coming across as really dense - it's been a long week and it's only Wednesday!

You need to declare the MOVE_SPEED variable as global in your MOVE_SPEEDCH function.

Code:

def MOVE_SPEEDCH():

        global MOVE_SPEED

        MOVE_SPEED=0

vizact.ontimer(22,MOVE_SPEEDCH)

The Python Tips page in the docs explains when you need to use the global keyword.

Thank you poppet - you're a star - works beautifully!